AMSAT-BB March 2021

121 participants
172 discussions

Re: LVB Tracker firmware with multiple calibration points?

by randyw4412＠aol.com

How do I unsurcribe? On Sunday, March 21, 2021 alex <alex(a)kr1st.com> wrote: Hi Jarda, Thank you for your note and sharing your thoughts. Your assumptions are correct. Even though the circuit of the controller of the G-450XL (which rather different than the G450(A) and the G5500 btw) makes it less suitable to control it with a LVB type tracker, it is rather clever in that it compensates for an aging potentiometer inside the rotor. Indeed it uses a DC motor to display the direction. I did look at those manuals before and that's how I noticed the differences. Actually, the board inside the G-450XL controller identifies it as a KP-650XL. The potentiometer in the rotator and the one in the controller are part of a bridge circuit. When the rotator moves and the value of the pot meter in the rotator changes, the bridge gets unbalanced and a voltage gets generated that will drive the motor in the controllor until the pot meter in the controller balances the bridge again. So it's a synchronous system. I did add an opamp circuit between where I pick off the indicator voltage from the pot meter inside the controller and the tracker. That did not make things linear. I think it's the two transistors near the bridge that start to play a role once the rotator passes 180 degrees that make things non-linear. I'm not even sure why they are there. The condition you mentioned is indeed occuring. The voltage varies from 1.54-4.44 for 0-360 degrees. I have a PIC programmer and a few extra PIC's on order. I think if I can manage to add calibration points for every 30 degrees it will work OK. 73, --Alex KR1ST On 2021-03-20 08:59, ok2gz wrote: Hi Alex, I guess that Your trouble with LVB tracker is made by the circuity of G450 azimuth sensor and connection between G450 and LVB. LVB tracker was developed for G5500 rotator, which (as I guess) has different internal circuity. I Guess also, that g450 Azimuth rotaror uses DC motor in the control box to show position in the scale 0-360 degrees and internal circuity serves for liear driving DC motor inside (as position indicator). Manual for GS232 says, that Yaesu tracker GS232 (similar to LVB) works with : G800,G1000,G2800 G400,G500,G550 G5400,G5500, G5600 rotators.. Please look for three manuals (pdf files on the web): 1. Your G450 2. G5500 3. GS232 Yeaesu satellite tracker, where is lot of importatn informations G5500 has sensor constructed with 500 ohm potentiometer feeded by 6V source and regulated by OZ amplifier into the 0-5V limit. For good linearity is very important, that potentiometer - sensor cannot be loaded with low impedance - reason for use the OZ amplifier ( high input impedance for potentiometer, low output impedance for AD converter input!). Otherwise the linearity will go down. LVB tracker expect, that input voltage from sensor is in interval 0 - 5V for azimuth 0 to 360 degrees (or 450 degrees with G5500). LVB uses 8bit PIC microcontroller with 10 bit AD converter - 1024 positions for 0-5V (with 5V AD reference voltage used in LVB). When occur condition: AZ = 0 degrees : 1.5V signal AZ = 360 degrees : 4.0 V signal then You get smaller resolution (half against 0-5V) And yet - without calibration it is quite wrong. LVB also expect to make the calibration, which is very well described by G6LVB and also in GS232 manual. During power-up You must press the button, the LVB internal code of PIC16F876 skip into the calibration procedure. Then You get on LCD display exact hints what to do - as described by G6LVB. Yet exist commands for calibration via the serial port terminal. They were developed by G6LVB and does not fit description in GS232 manual.. I hope it can help You with Your rotator. 73 Jarda ok2gz | | Virus-free. www.avg.com | ----------------------------------------------------------- Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org ----------------------------------------------------------- Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

1 year, 6 months

LVB Tracker firmware with multiple calibration points?

by ok2gz

Hi Alex, I guess that Your trouble with LVB tracker is made by the circuity of G450 azimuth sensor and connection between G450 and LVB. LVB tracker was developed for G5500 rotator, which (as I guess) has different internal circuity. I Guess also, that g450 Azimuth rotaror uses DC motor in the control box to show position in the scale 0-360 degrees and internal circuity serves for liear driving DC motor inside (as position indicator). Manual for GS232 says, that Yaesu tracker GS232 (similar to LVB) works with : G800,G1000,G2800 G400,G500,G550 G5400,G5500, G5600 rotators.. Please look for three manuals (pdf files on the web): 1. Your G450 2. G5500 3. GS232 Yeaesu satellite tracker, where is lot of importatn informations G5500 has sensor constructed with 500 ohm potentiometer feeded by 6V source and regulated by OZ amplifier into the 0-5V limit. For good linearity is very important, that potentiometer - sensor cannot be loaded with low impedance - reason for use the OZ amplifier ( high input impedance for potentiometer, low output impedance for AD converter input!). Otherwise the linearity will go down. LVB tracker expect, that input voltage from sensor is in interval 0 - 5V for azimuth 0 to 360 degrees (or 450 degrees with G5500). LVB uses 8bit PIC microcontroller with 10 bit AD converter - 1024 positions for 0-5V (with 5V AD reference voltage used in LVB). When occur condition: AZ = 0 degrees : 1.5V signal AZ = 360 degrees : 4.0 V signal then You get smaller resolution (half against 0-5V) And yet - without calibration it is quite wrong. LVB also expect to make the calibration, which is very well described by G6LVB and also in GS232 manual. During power-up You must press the button, the LVB internal code of PIC16F876 skip into the calibration procedure. Then You get on LCD display exact hints what to do - as described by G6LVB. Yet exist commands for calibration via the serial port terminal. They were developed by G6LVB and does not fit description in GS232 manual.. I hope it can help You with Your rotator. 73 Jarda ok2gz -- This email has been checked for viruses by AVG. https://www.avg.com

1 year, 6 months

Upcoming ARISS Contact Schedule as of 2021-03-21 17:30 UTC

by aj9n＠aol.com

Upcoming ARISS Contact Schedule as of 2021-03-21 17:30 UTC Quick list of scheduled contacts and events: The next contacts are probably going to be via the Kenwood TM-D710E radio located in the Service Module. You may or may not notice a difference in signal when compared to the Kenwood TM-710GA that is in the Columbus module. Oakwood School, Morgan Hill, CA, Multi-point Telebridge via IK1SLD The ISS callsign is presently scheduled to be OR4ISS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled astronaut is Shannon Walker KD5DXB Contact is go for: Mon 2021-03-22 18:27:49 UTC 66 deg Watch for livestream at: https://www.youtube.com/watch?v=Vg8ni7Gq6Z0 or https://www.youtube.com/arisslive (***) The School of Information Technology & Mathematical Sciences, Southern Hemisphere Space Studies Program 2021, Mawson Lakes, SA, Australia, telebridge via NA7V The ISS callsign is presently scheduled to be NA1SS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled astronaut is Shannon Walker KD5DXB Contact is go for: Wed 2021-03-24 07:51:16 UTC 45 deg ************************************************************************************************************* The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The latest list of frequencies in use can be found at https://www.ariss.org/contact-the-iss.html ######################################################################################################################################## A multi-point telebridge contact means that each student will be on the telebridge from their own home. **************************************************************************************************************************************** ARISS is very aware of the impact that COVID-19 is having on schools and the public in general. As such, we may have last minute cancellations or postponements of school contacts. As always, I will try to provide everyone with near-real-time updates. Watch for future COVID-19 related announcements at https://www.ariss.org/ The following schools have now been postponed or cancelled due to COVID-19: Postponed: No new schools Cancelled: No new schools **************************************************************************************************************************************** Note, all times are approximate. It is recommended that you do your own orbital prediction or start listening about 10 minutes before the listed time. All dates and times listed follow International Standard ISO 8601 date and time format YYYY-MM-DD HH:MM:SS The complete schedule page has been updated as of 2021-03-21 17:30 UTC. (***) Here you will find a listing of all scheduled school contacts, and questions, other ISS related websites, IRLP and Echolink websites, and instructions for any contact that may be streamed live. https://www.amsat.org/amsat/ariss/news/arissnews.rtf https://www.amsat.org/amsat/ariss/news/arissnews.txt The successful school list has been updated as of 2021-03-18 01:00 UTC. https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf The ARISS webpage is at https://www.ariss.org/ Note that there are links to other ARISS websites from this site. The main page for Applying to Host a Scheduled Contact may be found at https://www.ariss.org/apply-to-host-an-ariss-contact.html +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ARISS Contact Applications (United States) New Proposal Window is February 15th, 2021 to March 31st, 2021 The Amateur Radio on the International Space Station (ARISS) Program is seeking formal and informal education institutions and organizations, individually or working together, to host an Amateur Radio contact with a crew member on board the ISS. ARISS anticipates that the contact would be held between January 1, 2022 and June 30, 2022. Crew scheduling and ISS orbits will determine the exact contact dates. To maximize these radio contact opportunities, ARISS is looking for organizations that will draw large numbers of participants and integrate the contact into a well-developed education plan. The deadline to submit a proposal is March 31st, 2021. Proposal information and more details such as expectations, proposal guidelines and the proposal form can be found at www.ariss.org. An ARISS Introductory Webinar session will be held on February 25th, 2021 at 8 PM ET. The Eventbrite link to sign up is: https://ariss-proposal-webinar-spring-2021.eventbrite.com The Opportunity Crew members aboard the International Space Station will participate in scheduled Amateur Radio contacts. These radio contacts are approximately 10 minutes in length and allow students to interact with the astronauts through a question-and-answer session. An ARISS contact is a voice-only communication opportunity via Amateur Radio between astronauts and cosmonauts aboard the space station and classrooms and communities. ARISS contacts afford education audiences the opportunity to learn firsthand from astronauts what it is like to live and work in space and to learn about space research conducted on the ISS. Students also will have an opportunity to learn about satellite communication, wireless technology, and radio science. Because of the nature of human spaceflight and the complexity of scheduling activities aboard the ISS, organizations must demonstrate flexibility to accommodate changes in dates and times of the radio contact. Amateur Radio organizations around the world with the support of NASA and space agencies in Russia, Canada, Japan and Europe present educational organizations with this opportunity. The ham radio organizations’ volunteer efforts provide the equipment and operational support to enable communication between crew on the ISS and students around the world using Amateur Radio. Please direct any questions to ariss.us.education(a)gmail.com. For future proposal information and more details such as expectations, proposal guidelines and proposal form, and dates and times of Information Webinars, go to www.ariss.org. About ARISS: Amateur Radio on the International Space Station (ARISS) is a cooperative venture of international amateur radio societies and the space agencies that support the International Space Station (ISS). In the United States, sponsors are the Radio Amateur Satellite Corporation (AMSAT), the American Radio Relay League (ARRL), the ISS National Lab and National Aeronautics and Space Administration (NASA). The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEAM) topics by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or public forms. Before and during these radio contacts, students, educators, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ARISS Contact Applications (Europe, Africa and the Middle East) Schools and Youth organizations in Europe, Africa and the Middle East interested in setting up an ARISS radio contact with an astronaut on board the International Space Station are invited to submit an application from September to October and from February to April. Please refer to details and the application form at www.ariss-eu.org/school-contacts. Applications should be addressed by email to: school.selection.manager(a)ariss-eu.org ARISS Contact Applications (Canada, Central and South America, Asia and Australia and Russia) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Organizations outside the United States can apply for an ARISS contact by filling out an application. Please direct questions to the appropriate regional representative listed below. If your country is not specifically listed, send your questions to the nearest ARISS Region listed. If you are unsure which address to use, please send your question to the ARISS-Canada representative; they will forward your question to the appropriate coordinator. For the application, go to: https://www.ariss.org/ariss-application.html. ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD email to: ve3tbd(a)gmail.com ARISS-Japan, Asia, Pacific and Australia: Satoshi Yasuda, 7M3TJZ email to: ariss(a)iaru-r3.org, Japan Amateur Radio League (JARL) https://www.jarl.org/ ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) https://srr.ru/ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ARISS is always glad to receive listener reports for the above contacts. ARISS thanks everyone in advance for their assistance. Feel free to send your reports to aj9n(a)amsat.org or aj9n(a)aol.com. Listen for the ISS on the downlink of 145.8Ø MHz unless otherwise noted. ******************************************************************************* All ARISS contacts are made via the Kenwood radio unless otherwise noted. ******************************************************************************* Several of you have sent me emails asking about the RAC ARISS website and not being able to get in. That has now been changed to https://www.ariss.org/ Note that there are links to other ARISS websites from this site. **************************************************************************** Looking for something new to do? How about receiving DATV from the ISS? Please note that the HamTV system has been brought back to earth for troubleshooting. Please monitor ARISS-EU or ARISS-ON for the very latest news on the troubleshooting efforts. If interested, then please go to the ARISS-EU website for complete details. Look for the buttons indicating Ham Video. http://www.ariss-eu.org/ If you need some assistance, ARISS mentor Kerry N6IZW, might be able to provide some insight. Contact Kerry at kbanke(a)sbcglobal.net The HamTV webpage: https://www.amsat-on.be/hamtv-summary/ **************************************************************************** ARISS congratulations the following mentors who have now mentored over 100 schools: Sergey RV3DR with 141 Francesco IKØWGF with 140 Satoshi 7M3TJZ with 140 Gaston ON4WF with 123 **************************************************************************** The webpages listed below were all reviewed for accuracy. Out of date webpages were removed, and new ones have been added. If there are additional ARISS websites I need to know about, please let me know. Total number of ARISS ISS to earth school events is 1427. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1360. Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is 48. Please feel free to contact me if more detailed statistics are needed. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ The following US states and entities have never had an ARISS contact: South Dakota, American Samoa, Guam, Northern Marianas Islands, and the Virgin Islands. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ QSL information may be found at: https://www.ariss.org/qsl-cards.html ISS callsigns: DPØISS, IRØISS, NA1SS, OR4ISS, RSØISS **************************************************************************** Frequency chart for packet, voice, and crossband repeater modes showing Doppler correction as of 2005-07-29 04:00 UTC https://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correcti… Check out the Zoho reports of the ARISS contacts https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415 **************************************************************************** Exp. 63 now on orbit Kate Rubins KG5FYJ Sergey Ryzhikov Sergey Kud-Sverchkov SpaceX-Crew 1 on orbit Victor Glover KI5BKC Mike Hopkins KF5LJG Soichi Noguchi KD5TVP Shannon Walker KD5DXB **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

1 year, 6 months

Re: Ambassador Talk?

by Bill Acito

I think Clint was asking if there was a separate email reflector from amsat-bb. Not that I have ever heard of. b Bill ACITO | W1PA

1 year, 6 months

Award

by Bob Liddy (K8BL)

Richard (KC3EF), You are eligible for the AMSAT Communicators Award for making yourfirst SAT QSO. I have a recording of it from the rove the other day atEM50/51 on CAS-4A. I'll send you an MP3 if I can figure out how. GL/73, Bob K8BL AMSAT Satellite Communicators Club – AMSAT | | | | | | | | | | | AMSAT Satellite Communicators Club – AMSAT | | |

1 year, 6 months

Launch of STECCO satellite

by Fabrizio Carrai

In July 2020 AMSAT Italy and the School of Aerospace Engineering (SIA) of the University "La Sapienza" in Rome, represented respectively by Dr. Emanuele D'Andria and Dr. Paolo Teofilatto, signed an agreement to collaborate in a synergic way to achieve common objectives including the development of satellites and the study of related disciplines in the space field. And it is within this agreement that was born the collaboration for the development of the *STECCO* satellite, acronym for Space Travelling Egg-Controlled Catadioptric Object. The satellite aims to test an innovative attitude control device and at the same time to implement an amateur radio digipeater. The repeater will be always active simultaneously with the other functions of the satellite. *STECCO* will operate both in uplink and downlink at the frequency of 435.800 Mhz, 9600 baud FSK modulation, G3RUH coding, AX.25 protocol. Beacon and telemetry info are available on the project web site [1] *STECCO* will be launched together with other satellites on March 20, 2021 at 6:07 am GMT from the Bajkonur cosmodrome, Kazakistan, on a Soyuz-2 rocket, in heliosynchronous orbit. Preliminary TLEs calculated on the estimated launch parameters are available on the same project web site. [1] The amateur radio community is also invited to share the satellite telemetry sending the data to the AMSAT Italia secretariat [segreteria] at [ amsat.it]. IARU coordination info are available at http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=782 [1] https://sites.google.com/uniroma1.it/stecco-sia/radio-amateurs?authuser=0 -- *Fabrizio IU5GEZ on behalf of AMSAT Italia*

1 year, 6 months

Ambassador Talk?

by Clint Bradford

Is there an AMSAT message system just for Ambassadors - where we can discuss presentations and exchange ideas? Clint K6LCS Sent from my iPhone

1 year, 6 months

ANS-080 AMSAT News Service Weekly Bulletins

by Paul Stoetzer

AMSAT NEWS SERVICE ANS-080 The AMSAT News Service bulletins are a free, weekly news and information service of AMSAT, The Radio Amateur Satellite Corporation. ANS publishes news related to Amateur Radio in Space including reports on the activities of a worldwide group of Amateur Radio operators who share an active interest in designing, building, launching and communicating through analog and digital Amateur Radio satellites. The news feed on http://www.amsat.org publishes news of Amateur Radio in Space as soon as our volunteers can post it. Please send any amateur satellite news or reports to: ans-editor(a)amsat.org You can sign up for free e-mail delivery of the AMSAT News Service Bulletins via the ANS List; to join this list see: https://mailman.amsat.org/postorius/lists/ans.amsat.org/ In this edition: * January/February 2021 Issue of The AMSAT Journal Now Available * Apogee View - January/February 2021 * AMSAT Vice President - Engineering Jerry Buxton, N0JY, Presents at JAMSAT Symposium * ARISS Columbus Radio Station Once Again Operational! * Houston AMSAT Net #1400 and 28 Years * Soyuz Launch Carrying Several Amateur Radio Payloads Delayed * Changes to AMSAT TLE Distribution for March 18, 2021 * ARISS News * Upcoming Satellite Operations * Hamfests, Conventions, Maker Faires, and Other Events * Satellite Shorts From All Over AMSAT News Service Bulletin 080.01 To: All RADIO AMATEURS From: Radio Amateur Satellite Corporation 712 H Street NE Suite 1653 Washington, DC 20002 DATE 2021 Mar 21 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Join the 2021 President's Club! Score your 2" 4-Color Accent Commemorative Coin with Polished Gold Finish, Full Color Certificate and Embroidered "Remove Before Flight" Key Tag By donating today at https://www.amsat.org/join-the-amsat-presidents-club/ You won't want to miss it! -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- January/February 2021 Issue of The AMSAT Journal Now Available The January/February 2021 issue of The AMSAT Journal is now available to AMSAT members on AMSAT’s Member Portal. The AMSAT Journal is a bi-monthly digital magazine for amateur radio in space enthusiasts, published by the Radio Amateur Satellite Corporation (AMSAT). Each issue is your source for hardware and software projects, technical tips, STEM initiatives, operational activities, and news from around the world. Inside the Current Issue: * Apogee View – Robert Bankston, KE4AL * For Beginners — Amateur Radio Satellite Primer IX – Keith Baker, KB1SF/VA3KSF * The Yolinda Lindenblad: A Wideband Omnidirectional Circularly-polarized Antenna – Lapo Pieri, IK5NAX * Martha Saragovitz Retires – Keith Baker, KB1SF/VA3KSF & Joe Kornowski, KB6IGK AMSAT members can access the Journal at https://launch.amsat.org/The_AMSAT_Journal. Not a member? Join today at https://launch.amsat.org/ [ANS thanks AMSAT for the above information] --------------------------------------------------------------------- Apogee View - January/February 2021 These past two months have certainly been an emotional rollercoaster, with the launch and then silence from RadFxSat-2 (Fox-1E). Getting a front row seat at Virgin Orbit’s virtual launch event was a thrilling event for me. I only wish they would have allowed us to share that opportunity with all of you. The excitement of another AMSAT satellite in space, however, faded quickly, with each passing orbit and no beacon reception report. As disheartening as this was, I was never more proud of our Engineering and Operations teams, working together in an attempt to command RadFxSat-2. While all this was going on, Brad Schumacher, W5SAT, reported hearing his own CW signal through RadFxSat-2’s transponder, on January 27th. Our Engineering and Operations team were able to duplicate Brad’s efforts and confirm that RadFxSat-2’s transponder was partially functioning, although at an extremely reduced power. Having satisfied the requirements for OSCAR designation, RadFxSat-2 (Fox-1E) was designated AMSAT-OSCAR 109 (AO-109). Our attempts to determine what is keeping AO-109 from functioning properly continues to this day. Receiving the beacon is still our top priority, as one frame of telemetry will give us a much needed look on the health of each subsystem. We know the signal is going to be weak and will require a big antenna system to hear it. Any assistance you can provide would be greatly appreciated; however, we continue to ask that amateur satellite operators not attempt to use the transponder until further notice, as this may draw available power away from the beacon. I want to personally thank all of our volunteers on the engineering and operations team for all of their hard work, our friends at Vanderbilt University’s Institute for Space and Defense Electronics for sharing this dream with us, and each of you for your patience and understanding as we seek to overcome this challenge. Will There Be a Fox-2? AO-109 (RadFxSat-2/Fox-1E) marks the last of the planned Fox-1 series of CubeSats. At the same time, while SO-50 continues to operate in LEO, AMSAT finds itself without a continuously operational FM-mode satellite in space. Since AO-51, the so-called “EasySats,” have been the most popular amateur satellites. AO-85, AO-91, and AO-92 have proven that offering an easy-to-use and easily accessible satellite, requiring only a handheld transceiver and a small, handheld directional beam, is essential both for those just getting started on amateur satellites and seasoned operators. In addition, these EasySats play a critical role in introducing amateur satellite communication and extending our educational outreach. It is imperative that we find a way to provide a sustained presence of FM crossband repeaters in low Earth orbit, without taking away from our current plans to return to high Earth orbits, and I will be making such a proposal to our Board of Directors in the coming months. If the challenges and shortened lives of AMSAT’s Fox-1 series of satellites has taught us anything, it is that trying to shoehorn all of the required subsystems and experiments into a spacecraft no bigger than a softball is no easy feat. We must simplify our designs yet add robustness and redundancy. By chance, AO-7 rose from the dead when its batteries shorted. We need this capability designed into our electrical power system, so, when the batteries fail, the radios are still powered by the solar panels when the satellite is not in eclipse. In addition, we need to ensure no single point of failure jeopardizes our mission. Including redundancy and failsafes in our design will provide added assurance. Another challenge for us is that AMSAT does not have another FM crossband repeater in its inventory to use for a future satellite, because the necessary components have been discontinued. AMSAT is working on procuring a new, open design for not only our needs but to share with the rest of the world. More information on our plans to accomplish this will follow in a few months. Running more than one satellite project at the same time will be challenging. With limited volunteer and financial resources, we must make smart decisions. GOLF-TEE and GOLF-1 are still our primary projects, as we continue our march upward to HEO, so we must find ways to recruit additional volunteer engineers, use commercial, off-the-shelf components, outsource construction, and/or a combination thereof. We have a great opportunity before us, but it is only possible with your support. Your continued membership in AMSAT, purchases in the AMSAT Store, and generous donations, combined with the cost-cutting measures I have recently enacted will help us get there. Please join us in our journey Onward and Upward. [ANS thanks Robert Bankston, KE4AL, AMSAT President, for the above information] --------------------------------------------------------------------- AMSAT Vice President - Engineering Jerry Buxton, N0JY, Presents at JAMSAT Symposium AMSAT Vice President Jerry Buxton, N0JY, gave a presentation detailing some of the challenges and work being done to return to HEO at the 2021 JAMSAT Symposium on March 20th. A replay of the presentation can be viewed at https://youtu.be/b8K3k1RnJMQ?t=3440 [ANS thanks Jerry Buxton, N0JY, AMSAT Vice President - Engineering for the above information] +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ Need new satellite antennas? Purchase Arrows, Alaskan Arrows, and M2 LEO-Packs from the AMSAT Store. When you purchase through AMSAT, a portion of the proceeds goes towards Keeping Amateur Radio in Space. https://amsat.org/product-category/hardware/ +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ ARISS Columbus Radio System Once Again Operational! The ARISS Columbus Radio is back on-the-air! This, after it was rendered non-operational following a January 27 EVA (spacewalk) which was conducted to install a cable for the Bartolomeo commercial platform. During the January 27 spacewalk, the Bartolomeo HMU-601 cable, described in the March 10 ARISS Press conference ( https://www.youtube.com/watch?v=7hm4h4rBE9k&t=2214s), was installed in series with the ARISS antenna cable (HMU-895). As part of a spacewalk conducted yesterday, March 13, Astronaut Michael Hopkins successfully completed the installation of three PAPOS connectors for the new Bartolomeo platform on the Columbus Module. After this task, Hopkins started the ARISS task. He moved to the opposite side of Columbus, where he removed the HMU-601 cable from the APCU J02 connector and reinstalled the ARISS antenna cable (HMU-895) connector back into the APCU J02 connector. This returned the ARISS system back to its pre-January 27 configuration. At around 1200 UTC today, the astronauts turned on the ARISS radio system in Columbus. It was placed in PM3, or Packet Mode. PM3 employs a downlink frequency of 145.825 MHz. Shortly after radio startup, APRS signals were heard in California, Utah, and Idaho as the ISS passed along the USA West Coast. ARISS Team member, Christy Hunter, KB6LTY, confirmed she digipeated through the ARISS radio system, NA1SS, during this pass. With confirmation from additional stations in South America and the Middle East, the ARISS team has declared the radio system again operational. On behalf of the ARISS International Team, our heartfelt thanks to all that helped ARISS work through the cable anomaly investigation, troubleshooting and ultimate repair. Special shout-outs go to the ISS crew, the operations and engineering teams at NASA, ESA and Airbus, and ARISS-Russia leader Sergey Samburov, RV3DR, whose quick actions allowed ARISS to maintain our school contact operations via the ARISS Service Module radio system. Our deepest appreciation also goes out to the ARISS International hardware and operations teams that worked so diligently to analyze, troubleshoot, develop operations procedures, move school contact operations, and inform the team and the public. The ARISS team would also like to congratulate the ESA/Airbus Bartolomeo team! With the successful installation of 3 of the PAPOS connectors, as part of yesterday’s spacewalk, Bartolomeo is now operational! Yesterday was a great day for all! Ad Astra! [ANS thanks Frank Bauer, KA3HDO, ARISS International Chair and ARISS-USA Executive Director, for the above information] --------------------------------------------------------------------- Houston AMSAT Net #1400 and 28 Years It has been some 28 years since I first became involved with the Houston AMSAT Net. Andy, W5ACM, (then WA5ZIB), Marty, WV5Y, (then WD5DZC) and I were staples on the net. Ed, N5EM, was the host back then. Ed backed off and Andy took over. Andy and Marty were doing the net many years prior to my joining. I started numbering the nets in 1993. If you missed this special net, you can stream it from my website http://www.amsatnet.com click on Our Audio and select Net #1400. You can also listen as a podcast at the iTunes store by searching for KK5DO or AMSAT. Andy has been under the weather and not able to join us for this net. We have had fun over the years and we have done many different things. I did a little history from the beginning until today. If you have a chance take a listen. [ANS thanks Bruce Paige, KK5DO, AMSAT Director, for the above information] --------------------------------------------------------------------- Soyuz Launch Carrying Several Amateur Radio Payloads Delayed A Soyuz rocket carrying several amateur payloads was scrubbed from its planned launch at 06:07 UTC on March 20, 2021. The launch is now planned for 06:07 UTC on March 22, 2021. This launch carries several amateur radio payloads. Details below are compiled from AMSAT-BB posts over the past several days. DIY-1: On 03/22/2021 between 11:55 and 11:58 UTC, three radio amateur pocketqubes will be deployed from the mothership UNISAT-7: DIY-1, SMOG-1 and STECCO. DIY-1 / ARDUIQUBE (ARGENTINA): Frequency: 437.125 MHz USB/CW Power: 25/50/100 mW. Telemetry: RTTY 100BD 7N2, 15 ppm CW. ROBOT CW autotransponder, (like RS-5 / RS-7 / RS10-11 soviet satellites) Antenna: dipole At the time of deployment DIY will be in low power until verifying the status of the battery and will be sending only telemetry in an RTTY sentence. It is recommended to receive it with the FLDIGI-HAB program. Once the operation and battery charge are verified, the ROBOT will be activated and we hope it will be the delight of the CW enthusiasts. Much more info once in orbit. I appreciate the reception reports. (Gustavo Carpignano, LW2DTZ) BCCSAT-1: Editor's Note: BCCSAT-1 has not been coordinated by the IARU. BCCSAT-1 is an educational multi-spectral Cubesat 1U developed by the cooperation between Bangkok Christian College and the King’s Mongkut university of technology north Bangkok. http://bccsat.bcc.ac.th/ Schedule When our cubesat is completely finished it will be launched into space in March 22,2021 06.07 AM UTC at Russia with the Soyuz-2.1 rocket by UNISAT-7 GAUSS SRL to the low earth orbit at 575 km. http://en.roscosmos.ru/21973/ and https://www.roscosmos.ru/30285/ Downlink Frequency Beacon 435.635 MHz CW https://www.youtube.com/watch?v=hPpSTEf3PUI Slow Scan Digital Video SSDV Data 435.635 MHz AFSK 1.2 kbps Telemetry Data 435.635 MHz GMSK 9.6 kbps After launch into space if AMSAT member receives the CW signal of BCCSAT-1 satellite. please send information to our team directly an email to: bccsat1(a)gmail.com BCCSAT-1 is a technology demonstration satellite in Thailand. High school students in Bangkok Cristian College in collaboration with King Mongkut’s University of Technology (KMUTNB) and the Radio Amateur Society of Thailand (RAST) https://www.youtube.com/watch?v=zEcg5q7ZBw0 are building the satellite. The project aims to build capacity on systems engineering, space education, and radio communication technology to students. During the project, students will learn about communication technology through amateur radio activities. It also encourages other interested people to receive the satellite signal. The main missions of BCCSAT-1 include: (1) testing in-house developed satellite transceiver and antenna in orbit (2) experiment of Slow-Scan Digital Video (SSDV) transmission from the satellite (3) take pictures of Earth by cameras onboard satellite BCCSAT-1 communication subsystem is an in-house developed transceiver and antennas. It has the capability to transmit GMSK modulation signal at 9.6 kbps, FSK for SSDV at 1.2 kbps and receive AFSK signal at 1.2 kbps. The transceiver will send its parameter such as RSSI and temperature to the ground station. BCCSAT-1 will carry four cameras onboard the satellite and aim to capture images of the Earth in different wavelengths: red, green, blue, NIR, and Red Edge band. We hope to process the images acquired for the Normalized Difference Vegetation Index (NDVI) and widely used in Science education. The images will be widely distributed among amateur radio community via the experiment of SSDV transmission system and GMSK packets downlink. Moreover, BCCSAT-1 will be able to transmit pre-stored images chosen by high school students. BCCSAT-1 will provide the multi spectral images by having the total of 5 cameras on board; Red, Green, Blue, NIR, and Red Edge bands. The images we get from these cameras will be used to process for the Normalized difference vegetation index (NDVI), that will significantly provides huge advantage on analyzing the terrain of the country. (Tanan Rangseeprom, HS1JAN) STECCO: In July 2020 AMSAT Italy and the School of Aerospace Engineering (SIA) of the University "La Sapienza" in Rome, represented respectively by Dr. Emanuele D'Andria and Dr. Paolo Teofilatto, signed an agreement to collaborate in a synergic way to achieve common objectives including the development of satellites and the study of related disciplines in the space field. And it is within this agreement that was born the collaboration for the development of the STECCO satellite, acronym for Space Travelling Egg-Controlled Catadioptric Object. The satellite aims to test an innovative attitude control device and at the same time to implement an amateur radio digipeater. The repeater will be always active simultaneously with the other functions of the satellite. STECCO will operate both in uplink and downlink at the frequency of 435.800 Mhz, 9600 baud FSK modulation, G3RUH coding, AX.25 protocol. Beacon and telemetry info are available on the project web site [1] STECCO will be launched together with other satellites on March 22, 2021 at 6:07 am GMT from the Bajkonur cosmodrome, Kazakistan, on a Soyuz-2 rocket, in heliosynchronous orbit. Preliminary TLEs calculated on the estimated launch parameters are available on the same project web site. [1] The amateur radio community is also invited to share the satellite telemetry sending the data to the AMSAT Italia secretariat [segreteria] at [ amsat.it]. IARU coordination info are available at http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=782 [1] https://sites.google.com/uniroma1.it/stecco-sia/radio-amateurs?authuser=0 (Fabrizio IU5GEZ on behalf of AMSAT Italia) [ANS thanks the sources listed for the above information] --------------------------------------------------------------------- Changes to AMSAT TLE Distribution for March 18, 2021 The following satellite has been added BACK to this week's AMSAT TLE Distribution: Delfi-N3xt - NORAD Cat ID 39428. This satellite has come back to life after seven years of silence. (Remember AO-07 coming back after 21 years of silence?) Thanks to AMSAT News Service Bulletin 073 (Mark Johns, K0JM) for this very good news. The following satellite has decayed from orbit and has been removed from this week's AMSAT TLE Distribution: Delphini - NORAD Cat ID 44030 (Decayed 3-14-2021 per Space-Track). (I am pretty sure it won't come back!) [ANS thanks Ray Hoad, WA5QGD, AMSAT Orbital Elements Manager, for the above information] +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ AMSAT's GOLF Program is about getting back to higher orbits, and it all begins with GOLF-TEE – a technology demonstrator for deployable solar panels, propulsion, and attitude control. Come along for the ride. The journey will be worth it! https://tinyurl.com/ANS-GOLF +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ ARISS News The next contacts are probably going to be via the Kenwood TM-D710E radio located in the Service Module. You may or may not notice a difference in signal when compared to the Kenwood TM-710GA that is in the Columbus module. Goodwood Primary School, Adelaide, South Australia, Australia, telebridge via NA7V The ISS callsign is presently scheduled to be NA1SS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled astronaut is Shannon Walker KD5DXB (***) Contact was successful: Wed 2021-03-17 08:32:31 UTC 33 deg (***) Oakwood School, Morgan Hill, CA, Multi-point Telebridge via IK1SLD The ISS callsign is presently scheduled to be OR4ISS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled astronaut is Shannon Walker KD5DXB Contact is go for: Mon 2021-03-22 18:27:49 UTC 66 deg The School of Information Technology & Mathematical Sciences, Southern Hemisphere Space Studies Program 2021, Mawson Lakes, SA, Australia, telebridge via NA7V The ISS callsign is presently scheduled to be NA1SS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled astronaut is Shannon Walker KD5DXB Contact is go for: Wed 2021-03-24 07:51:16 UTC 45 deg The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The latest list of frequencies in use can be found at https://www.ariss.org/contact-the-iss.html [ANS thanks Charlie Sufana, AJ9N, one of the ARISS operation team mentors, for the above information] +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ Want to fly the colors on your own grid expedition? Get your AMSAT car flag and other neat stuff from our Zazzle store! 25% of the purchase price of each product goes towards Keeping Amateur Radio in Space https://www.zazzle.com/amsat_gear +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ Upcoming Satellite Operations ****Watch Twitter, there are lots pop-up roves happening lately, and I can’t keep this page updated with all of them.**** EL58: WL7T: EL58 happening April 1 … more to come. And then thinking Maine for the first weekend in April. Taking requests … EA5GX: Hi guys in 22/3/21 I will be in the RS44 7:41 in the morning pass and in afternoon 13:22 UTC around 345.645 from IM99 to Anyone want try qso. he will also be: Hi guys in 22/3/21 I will be in the RS44 7:41 in the morning pass and in afternoon 13:22 UTC around 345.645 from 4 grid IM99, JN00, JM09, IN90 Major Roves: CM93 Possibility: N6DNM Very long shot, but might want to put it on your calendar for May 15th, if you can figure out where it is and for #SOTA folks, that would be W6/SC-336, Santa Rosa Island, activated only once before. Please submit any additions or corrections to Ke0pbr (at) gmail.com [ANS thanks Paul Overn, KE0PBR, AMSAT rover page manager, for the above information] --------------------------------------------------------------------- Hamfests, Conventions, Maker Faires, and Other Events AMSAT Ambassador and ARRL registered instructor Clint Bradford, K6LCS, is certainly keeping busy! He reports these upcoming satellite presentation dates … 04/01 - Orem, Utah 06/15 - East Massachusetts … and more being scheduled. Think a 90-minute lively, informative, and fun “How to Work the Easy Satellites” Zoom presentation would be appropriate for your convention or club? Always includes are overviews of the ARRL, AMSAT, and ARISS … and pre-presentation questions are solicited and welcome. Send Clint an email or call! Clint Bradford K6LCS http://www.work-sat.com 909-999-SATS (7287) [ANS thanks Clint Bradford, K6LCS, AMSAT Ambassador, and Paul Overn, KE0PBR, AMSAT Events Page Manager, for the above information] --------------------------------------------------------------------- Satellite Shorts From All Over + AMSAT congratulates long-time satellite operator John Papay, K8YSE, on 60 years of being a licensed radio amateur. He has been operating as K8YSE/60 to celebrate the milestone. (Via Bob Liddy, K8BL) + Some hams in Europe were able to receive Falcon 9 launch telemetry at 2232.5 MHz with a HackRF and 1.2m dish and then demodulate it with GNU Radio. Impressive work, and somewhat surprising that the data isn’t encrypted. They were able to decode live video streams from the upper stage’s engineering cameras, including one of free-floating fuel in the LOX tank, which SpaceX livestream editors tend to switch away from. (ANS thanks The Orbital Index and reddit for the above information) + A published paper by a pair of actual physicists at Cornell University, handily entitled “Warp drive basics,” theorizes about warp drives (as in Star Trek). Their calculations require hypothetical negative mass-energy, but at least the ship as a whole can have positive finite mass. Unfortunately, the necessary relativistic bubble would isolate the ship from the outside world, so the ship cannot create or control its own warp bubble—this would have to be done externally. Meanwhile, a second paper by another Cornell physicist, proposes a warp drive solution that avoids the negative-mass problem, but currently still requires an “astronomical amount of energy.” Who says that science fiction can't be a serious catalyst for actual research? (ANS thanks The Orbital Index for the above information) + A SpaceX bid on a NASA CubeSat launch appeared to offer a vehicle other than Falcon 9 or Falcon Heavy (Perhaps Starship). More details at https://spacenews.com/spacex-bid-on-launch-of-nasa-cubesat-mission/ + The rtl-sdr.com blog features an article on receiving the SMOG-P and ATL-1 nanosatellites with an rtl-sdr. Check it out at https://www.rtl-sdr.com/receiving-smog-p-and-atl-1-nano-satellites-with-an-… + Several new products are available on the AMSAT Zazzle store, including a set of coasters, a watch, a t-shirt featuring the AMSAT round logo, and more. Check out the new items! 25% of the purchase price goes towards Keeping Amateur Radio in Space. https://www.zazzle.com/amsat_gear + All issues of The AMSAT Journal dating back to 2014 are now available to AMSAT members on AMSAT’s new membership portal. The 1969-2013 archive will be added at a later date. All editions of AMSAT’s Symposium Proceedings are also available for members. If you’re a current AMSAT member, get logged on today. If you are not yet a member, consider joining today at https://launch.amsat.org/ + The 2020 edition of AMSAT’s Getting Started with Amateur Satellites is now available on the AMSAT store. A perennial favorite, Getting Started is updated every year with the latest amateur satellite information, and is the premier primer of satellite operation. The book is presented in DRM-free PDF format, in full color, and covers all aspects of making your first contacts on a ham radio satellite. The digital download is available for $15 at https://tinyurl.com/2020GettingStarted. The print edition is $30 plus shipping and is available at https://tinyurl.com/GS2020Print --------------------------------------------------------------------- In addition to regular membership, AMSAT offers membership in the President’s Club. Members of the President’s Club, as sustaining donors to AMSAT Project Funds, will be eligible to receive additional benefits. President’s Club donations may be made at https://www.amsat.org/join-the-amsat-presidents-club/ Primary and secondary school students are eligible for membership at one-half the standard yearly rate. Post-secondary school students enrolled in at least half time status shall be eligible for the student rate for a maximum of 6 post-secondary years in this status. Join AMSAT today at https://launch.amsat.org/ 73 and remember to help Keep Amateur Radio in Space, This week’s ANS Editor, Paul Stoetzer, N8HM n8hm at amsat dot org

1 year, 6 months

Re: BCCSAT-1 launched into space

by Mark Jessop

Repeating my previous e-mail: Finally, while the extra information you have provided is useful (e.g. the documentation of the CW telemetry), it is incomplete. A closed-source binary does not constitute complete documentation of your downlink telemetry. - Table 7.1 shows a list of parameters, but it does not define the data-types, or conversions for each of them. This is necessary to decode the telemetry. - Your software decodes the SSDV imagery, but there is no information in your documentation on how the imagery is encapsulated and transmitted. Is this purely SSDV packets (e.g. encoded using https://github.com/fsphil/ssdv ) encapsulated in AX.25 frames? 73 Mark On Sun, Mar 21, 2021 at 3:42 AM BCCSAT 01 <bccsat1(a)gmail.com> wrote: > Sorry for the inconvenience. We have updated our website to include Radio > Specifications, CW Telemetry Format, GMSK Decoder Program. > (http://bccsat.bcc.ac.th/amateur-radio/) > PS. Currently, we only have an operation manual in Thai language. However, > we will translate it into english as soon as possible. > > Sincerely, > BCCSAT-1 Team > > On Fri, Mar 19, 2021 at 6:26 PM Mark Jessop <vk5qi(a)rfhead.net> wrote: > >> Hmm that does look similar doesn't it... (The block diagram for KnackSat >> is here: >> https://drive.google.com/file/d/0B4dwLLK3X59yekd6ekc5a284TEE/view ) >> >> Hopefully the BCCSAT team will release information on their downlink >> telemetry before the launch. As per the IARU satellite coordination >> documentation: >> "With the exception of control signals exchanged between earth command >> stations and space stations in the amateur-satellite service all amateur >> signals shall not be encoded for the purpose of obscuring their meaning. To >> meet this requirement, operators of satellites in the amateur-satellite >> service must publish full details of their modulation, encoding and >> telemetry formats and equations before launch." >> >> It's quite sad how many satellites are being launched taking advantage of >> the amateur radio satellite spectrum without giving anything back to the >> amateur radio community. I realise developing a cubesat is a challenge (I'm >> working on one myself... though not using the amateur bands), and that time >> may be short - but cubesat teams should remember that their 'free' access >> to amateur radio spectrum comes at the price of openness and transparency >> with respect to your satellites transmissions. There's heaps of amateur >> radio operators out there that would love to help receive telemetry from >> your satellites... but if you don't release any information then we can't >> help you. >> >> 73 >> Mark VK5QI >> >> >> >> On Fri, Mar 19, 2021 at 7:43 AM KI7UNJ Tucker <ki7unj(a)gmail.com> wrote: >> >>> Mark, >>> >>> What it looks like to me they are using the same freq as Knacksat... >>> heck seems like almost the same technology on board as Knacksat. >>> >>> http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=520 >>> >>> >>> >>> On Thu, Mar 18, 2021 at 1:42 PM Mark Jessop <vk5qi(a)rfhead.net> wrote: >>> >>>> Hi Tanan, >>>> >>>> Can you please point us to the specifications for your 9k6 and 1k2 >>>> telemetry downlinks? Usage of the amateur radio band requires that >>>> satellite operators release all their telemetry formats. This allows >>>> interested amateurs to be able to have a go at decoding telemetry, and >>>> allows projects like SatNOGS to help collect telemetry using the huge >>>> networks of volunteer ground-stations. >>>> >>>> In particular I would be very interested to decode the SSDV data. >>>> >>>> Also, it looks like this frequency was not coordinated with the IARU - >>>> or at least it's not showing up on the IARU coordination list ( >>>> http://www.amsatuk.me.uk/iaru/finished.php ). >>>> >>>> 73 >>>> Mark VK5QI >>>> >>>> On Fri, Mar 19, 2021 at 5:12 AM Tanan Rangseeprom <nanrspm(a)gmail.com> >>>> wrote: >>>> >>>>> BCCSAT-1 is an educational multi-spectral Cubesat 1U developed by the >>>>> cooperation between Bangkok Christian College and the King’s Mongkut >>>>> university of technology north Bangkok. http://bccsat.bcc.ac.th/ >>>>> >>>>> Schedule When our cubesat is completely finished it will be launched >>>>> into space in March 20,2021 06.07 AM UTC at Russia with the Soyuz-2.1 >>>>> rocket by UNISAT-7 GAUSS SRL to the low earth orbit at 575 km. >>>>> http://en.roscosmos.ru/21973/ and https://www.roscosmos.ru/30285/ >>>>> >>>>> BCCSAT-1 >>>>> 1 99999U 21999A 21079.53571058 -.00000058 00000-0 00000+0 0 06 >>>>> 2 99999 098.4012 345.1641 0004344 283.2593 155.6823 14.80364805 03 >>>>> >>>>> Downlink Frequency >>>>> Beacon 435.635 MHz CW https://www.youtube.com/watch?v=hPpSTEf3PUI >>>>> Slow Scan Digital Video SSDV Data 435.635 MHz AFSK 1.2 kbps >>>>> Telemetry Data 435.635 MHz GMSK 9.6 kbps >>>>> >>>>> After launch into space if AMSAT member receives the CW signal of >>>>> BCCSAT-1 satellite. please send information to our team directly an email >>>>> to: bccsat1(a)gmail.com >>>>> >>>>> BCCSAT-1 is a technology demonstration satellite in Thailand. High >>>>> school students in Bangkok Cristian College in collaboration with King >>>>> Mongkut’s University of Technology (KMUTNB) and the Radio Amateur Society >>>>> of Thailand (RAST) https://www.youtube.com/watch?v=zEcg5q7ZBw0 are >>>>> building the satellite. >>>>> >>>>> The project aims to build capacity on systems engineering, space >>>>> education, and radio communication technology to students. During the >>>>> project, students will learn about communication technology through amateur >>>>> radio activities. It also encourages other interested people to receive the >>>>> satellite signal. >>>>> >>>>> The main missions of BCCSAT-1 include: (1) testing in-house developed >>>>> satellite transceiver and antenna in orbit (2) experiment of Slow-Scan >>>>> Digital Video (SSDV) transmission from the satellite (3) take pictures of >>>>> Earth by cameras onboard satellite >>>>> >>>>> BCCSAT-1 communication subsystem is an in-house developed transceiver >>>>> and antennas. It has the capability to transmit GMSK modulation signal at >>>>> 9.6 kbps, FSK for SSDV at 1.2 kbps and receive AFSK signal at 1.2 kbps. The >>>>> transceiver will send its parameter such as RSSI and temperature to the >>>>> ground station. >>>>> >>>>> BCCSAT-1 will carry four cameras onboard the satellite and aim to >>>>> capture images of the Earth in different wavelengths: red, green, blue, >>>>> NIR, and Red Edge band. >>>>> >>>>> We hope to process the images acquired for the Normalized Difference >>>>> Vegetation Index (NDVI) and widely used in Science education. The images >>>>> will be widely distributed among amateur radio community via the experiment >>>>> of SSDV transmission system and GMSK packets downlink. Moreover, BCCSAT-1 >>>>> will be able to transmit pre-stored images chosen by high school students. >>>>> >>>>> BCCSAT-1 will provide the multi spectral images by having the total of >>>>> 5 cameras on board; Red, Green, Blue, NIR, and Red Edge bands. The images >>>>> we get from these cameras will be used to process for the Normalized >>>>> difference vegetation index (NDVI), that will significantly provides huge >>>>> advantage on analyzing the terrain of the country. >>>>> >>>>> 73 >>>>> Tanan Rangseeprom , HS1JAN >>>>> >>>>> ----------------------------------------------------------- >>>>> >>>>> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum >>>>> available >>>>> to all interested persons worldwide without requiring membership. >>>>> Opinions expressed >>>>> are solely those of the author, and do not reflect the official views >>>>> of AMSAT-NA. >>>>> Not an AMSAT-NA member? Join now to support the amateur satellite >>>>> program! >>>>> >>>>> View archives of this mailing list at >>>>> https://mailman.amsat.org/hyperkitty/list/[email protected] >>>>> To unsubscribe send an email to amsat-bb-leave(a)amsat.org >>>>> Manage all of your AMSAT-NA mailing list preferences at >>>>> https://mailman.amsat.org >>>> >>>> >>>> ----------------------------------------------------------- >>>> >>>> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available >>>> to all interested persons worldwide without requiring membership. >>>> Opinions expressed >>>> are solely those of the author, and do not reflect the official views >>>> of AMSAT-NA. >>>> Not an AMSAT-NA member? Join now to support the amateur satellite >>>> program! >>>> >>>> View archives of this mailing list at >>>> https://mailman.amsat.org/hyperkitty/list/[email protected] >>>> To unsubscribe send an email to amsat-bb-leave(a)amsat.org >>>> Manage all of your AMSAT-NA mailing list preferences at >>>> https://mailman.amsat.org >>> >>> >>> >>> -- >>> *Casey Tucker KI7UNJ* >>> https://twitter.com/KI7UNJ >>> >>>

1 year, 6 months

Sat Presentations - Update

by Clint Bradford

I just experienced something I haven’t in more than a year: A single physical room-full of people, sitting together, no masks - for my satellite presentation this morning via Zoom. Texas - they ARE different … (g) And we had a great time. Three attendees were “remote” on Zoom, but the Fannin, Texas ARC is back to in-person meetings. It truly felt “different” actually seeing the assemblage all together. https://k5frc.org/ Thanks to club rep Mark KF5KUW for the invitation. And, as usual, the Q&A during and afterwards was great. I debated whether or not to wear my autographed Nolan Ryan jersey - since they were only an hour or so away from Arlington Stadium … NEXT STOP: Another wonderful club - this time in Utah - next week! Clint K6LCS http://www.work-sat.com <http://www.work-sat.com/> 909-999-SATS (7287)

1 year, 6 months

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AMSAT-BB March 2021