February 2024 - AMSAT-BB - mailman.amsat.org

ARISS Contact with Thrive Home School Academy, Colorado Springs, Colorado, USA has been postponed
by David Jordan 01 Feb '24

01 Feb '24

Please take note that the ARISS contact scheduled for Thrive Home School Academy in Colorado Springs, Colorado on Friday, February 2, 2024 posted earlier today in the ARISS News Release No. 24-08, has been postponed. Dave Jordan, AA4KNARISS PRaa4kn(a)amsat.org

1 0

Re: BeliefSat-0 orbital data restored, reception reports requested
by Zach Metzinger 01 Feb '24

01 Feb '24

On 2/1/24 10:07, Paul Stoetzer via AMSAT-BB wrote: > AMSAT's PACSAT board - a modern version of the microsats - uses a > TMS-570, which is an ARM Cortex-R, running at up to 160 MHz with 1280K > of flash storage and 192K of RAM. MRAM will be used for BBS storage. The TI TMS570 "Hercules" processor is also used on the Golf RT-IHU, which will be the successor to the STM32 IHU used on the Fox series. It is important to note that the low-Earth orbit environment is much more forgiving than MEO and HEO. Radiation tolerance is an important factor when choosing hardware for these higher orbits, which drove the selection of this specific COTS (common off-the-shelf) processor. It is not a SOI (silicon on insulator) radiation-hard processor, but has features which make it more robust than, say, your off-the-shelf STM32 or ATMega64. 73, --- Zach N0ZGO

1 0

Re: BeliefSat-0 orbital data restored, reception reports requested
by Paul Stoetzer 01 Feb '24

01 Feb '24

Good background, Jim! Based on my reading of the documentation, the Fox-1 satellites ran on an STM32L151VBT - an ARM Cortex-M3 running at 32 MHz with 16K of RAM. There's also 128K of flash storage and 4K of EEPROM. Additionally, there was 128K of MRAM on the IHU board. AMSAT's PACSAT board - a modern version of the microsats - uses a TMS-570, which is an ARM Cortex-R, running at up to 160 MHz with 1280K of flash storage and 192K of RAM. MRAM will be used for BBS storage. If anyone wants to dive in to the AMSAT PACSAT details, they are available on GitHub at https://github.com/AMSAT-NA 73, Paul, N8HM On Thu, Feb 1, 2024 at 10:39 AM Jim White via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > I might add a couple of things. > > The 1990 AMSAT NA microsats ran on NEC V40's, essentially an 80286, at > 2.5MHz clock speed. They nicely handled 4 simultaneous uplinks and one > downlink at 1200 bps, along with store and forward messages and > telemetry collection and downlink. Later we we used that same processor > board design in Falconsat-3 for the Air Force Academy which ran for the > AFA, then in amateur use for 16 years. It had the same store and forward > messaging, plus several experiments on board. And, all of those > satellites had 256k of memory. > > Some years ago we built a couple of cubesats that ran on an AtMega64 8 > bit processor with a 11Mhz clock speed. We used only it's internal RAM > for processing storage, but had a 16Mb RAM chip for storing experiment > data. > > In the past few years the universities I work with who are building > cubesats tend to use Arduino, Beagle Bone Black, or Raspberry Pi, as the > main processor. Or they buy processor boards from suppliers of cubesat > subsystems - which are also pretty fast. The processing capability is > way overkill for the mission needs but that's what is available off the > shelf and it's what the students tend to be familiar with. So those are > good choices. These more capable processors are enabled by the doubling > of solar panel efficiency in the past 10 years or so, in some cases > including fold out solar panels, and by improvements in battery technology. > > Jim, WD0E > > Colorado Satellite Services > > > > On 1/31/2024 5:49 PM, Joseph B. Fitzgerald via AMSAT-BB wrote: > > Sasha Tim wrote: > > > >> This entire satellite runs on an Atmega328... > > You can do a lot with just a little, the Atmaga 328 compares favorably > to the computers that took US astronauts to the moon in many ways. Roughly > the same memory and computing power, plus the '328 consumes orders of > magnitude less space, power, weight and dollars. Saturn and Apollo > computers likely were better in radiation resistance and reliability though. > > > > AMSAT used radiation hardened RCA COSMAC 1802 on several spacecraft, and > I think one is still running on UO-11. That thing ran very slow, with a > machine cycle of about 100 kHz, with opcodes taking 2 or 3 cycles to > complete. > > > > de KM1P Joe > > > > > > ----------------------------------------------------------- > > > > 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. > > Acceptable Use and Privacy Policies available at > https://www.amsat.org/about-amsat/ > > > > 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. > Acceptable Use and Privacy Policies available at > https://www.amsat.org/about-amsat/ > > 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 0

ARISS News Release No. 24-08
by David Jordan 01 Feb '24

01 Feb '24

ARISS News Release No.24-08 DaveJordan, AA4KN ARISS PR aa4kn(a)amsat.org FOR IMMEDIATE RELEASE ARISSContact is Scheduled with Students at Thrive Home School Academy, Colorado Springs, Colorado, USA February 1,2024—Amateur Radio on the International Space Station (ARISS) has receivedschedule confirmation for an ARISS radio contact between an astronaut aboardthe International Space Station (ISS) and students at the Thrive Home SchoolAcademy located in Colorado Springs, CO. ARISS conducts 60-100 of these special amateur radio contacts each yearbetween students around the globe and crew members with ham radio licenses aboardthe ISS. ThriveHome School Academy (THSA) opened in 2009 and serves home schooled students ingrades K-12, with 367 students. The school offers students a one-day-per-weekfull school day programthat is highly interactive and experiential andengages students in hands-on activities. THSA also offers an array ofextracurricular activities to further enhance students’ learning outside of theclassroom. THSA has also worked with GrowingBeyond Earth on the NASA Veggie Project with Dr. Goia Massa for the last sixyears, allowing one of their students, who has worked on this project over thelast two years, to ask a question based on that work. While STEM education is afocus within the district, in the 2023-24 school year and leading up to thisARISS contact, the curriculum is focusing on space technologies and radiocommunication. Recently,the school district hosted astronauts Kevin Chilton and Susan Helms to come andtalk to students and their families about space communications and travel,space technologies, and their experiences in space. Members of the Pikes PeakRadio Amateur Association and ARRL Colorado Section Manager Amanda Alden havehelped students to learn about orbital mechanics and ham radio and satellitecommunications. This will be adirect contact via Amateur Radio allowing students to ask theirquestions of astronaut Loral O’Hara, amateur radio call sign KI5TOM. Thedownlink frequency for this contact is 145.800 MHz and may be heard bylisteners that are within the ISS-footprint that also encompasses the relayground station. The amateur radio ground station for this contact is in ColoradoSprings, CO. Amateur radio operators using call sign AFØS,will operate the ground station to establish and maintain the ISS connection. The ARISS radiocontact is scheduled for February 2, 2024 at 11:21:26 am MST (CO, USA) (18:21:26 UTC,1:21 pm EST, 12:21 pm CST, 10:21 am PST). The public isinvited to watch the live stream at: http://www.hsd2.org _______________________________ As time allows,students will ask these questions: 1. Do thingssmell or taste differently in space? 2. What is yourfavorite meal while on the International Space Station? 3. How did itfeel to walk in space? 4. How manyrooms does the ISS have, and do you have your own bedroom? 5. If the ISStravels at 17000 mph, why do you float? 6. Based on theresearch from the Veggie Project, could you grow a fruit-bearing bonsai tree inspace? 7. How do youkeep up your muscle mass? 8. How muchpower would it take to reach the nearest neutron star? 9. How do youcommunicate with your family when you are in space? 10. How does itfeel to take off in a rocket? 11. Whatinspired you to become an astronaut? 12. What isyour favorite thing you have seen in space? 13. When do youcome back from space and how will you get back? 14. Do youoperate and sleep on Universal time or Houston time? 15. Do you feellike you’re falling all the time? If not, how long does it last until you getused to it? 16. What is onemission you’ve done onboard, and do you like doing them? 17. Can youplay a musical instrument on the ISS? 18. Can you seeconstellations from the ISS? 19. What is onething you will do differently because of your experience in space? 20. What movieor show inspires you about space? About ARISS: Amateur Radio on the International Space Station (ARISS) isa cooperative venture of international amateur radio societies and the spaceagencies that support the ISS. In the United States, sponsors are the AmericanRadio Relay League (ARRL), Amateur Radio Digital Communications (ARDC), RadioAmateur Satellite Corporation (AMSAT), NASA’s Space Communications andNavigation program (SCaN) and the ISS National Lab—Space Station Explorers. Theprimary goal of ARISS is to promote exploration of science, technology,engineering, the arts, and mathematics topics. ARISS does this by organizingscheduled contacts via amateur radio between crew members aboard the ISS andstudents. Before and during these radio contacts, students, educators, parents,and communities take part in hands-on learning activities tied to space, spacetechnologies, and amateur radio. For more information, see http://www.ariss.org . Media Contact: Dave Jordan,AA4KN ARISS PR Find us onsocial media at: X (formerlyTwitter): ARISS_Intl Facebook:facebook.com/ARISSIntl Instagram:ariss_intl Mastodon:[email protected] Check out ARISSon Youtube.com.

1 0

Re: BeliefSat-0 orbital data restored, reception reports requested
by Jim White 01 Feb '24

01 Feb '24

I might add a couple of things. The 1990 AMSAT NA microsats ran on NEC V40's, essentially an 80286, at 2.5MHz clock speed. They nicely handled 4 simultaneous uplinks and one downlink at 1200 bps, along with store and forward messages and telemetry collection and downlink. Later we we used that same processor board design in Falconsat-3 for the Air Force Academy which ran for the AFA, then in amateur use for 16 years. It had the same store and forward messaging, plus several experiments on board. And, all of those satellites had 256k of memory. Some years ago we built a couple of cubesats that ran on an AtMega64 8 bit processor with a 11Mhz clock speed. We used only it's internal RAM for processing storage, but had a 16Mb RAM chip for storing experiment data. In the past few years the universities I work with who are building cubesats tend to use Arduino, Beagle Bone Black, or Raspberry Pi, as the main processor. Or they buy processor boards from suppliers of cubesat subsystems - which are also pretty fast. The processing capability is way overkill for the mission needs but that's what is available off the shelf and it's what the students tend to be familiar with. So those are good choices. These more capable processors are enabled by the doubling of solar panel efficiency in the past 10 years or so, in some cases including fold out solar panels, and by improvements in battery technology. Jim, WD0E Colorado Satellite Services On 1/31/2024 5:49 PM, Joseph B. Fitzgerald via AMSAT-BB wrote: > Sasha Tim wrote: > >> This entire satellite runs on an Atmega328... > You can do a lot with just a little, the Atmaga 328 compares favorably to the computers that took US astronauts to the moon in many ways. Roughly the same memory and computing power, plus the '328 consumes orders of magnitude less space, power, weight and dollars. Saturn and Apollo computers likely were better in radiation resistance and reliability though. > > AMSAT used radiation hardened RCA COSMAC 1802 on several spacecraft, and I think one is still running on UO-11. That thing ran very slow, with a machine cycle of about 100 kHz, with opcodes taking 2 or 3 cycles to complete. > > de KM1P Joe > > > ----------------------------------------------------------- > > 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. > Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/ > > 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 0

VUCC & DXCC Satellite Standing February 2024
by Jon Goering 01 Feb '24

01 Feb '24

VUCC Satellite Standing February 2024 ------------------------------------------------------------ VUCC Satellite Award/Endorsement Change Summary for January 01, 2024 to February 01, 2024. ------------------------------------------------------------ WC7V 1451 1457 N8RO 1401 1423 W5CBF 1224 1326 DL5GAC New 1300 DF2ET 1102 1200 KF7R 1075 1100 N0JE 1075 1100 N3GS 986 1038 OZ9AAR 900 1000 N8JCM New 917 EA2AA 875 883 KQ4DO 827 853 W8LR 825 841 W2GDJ 705 822 FG8OJ 737 801 VU2LBW 603 751 WD9EWK (DM43) 734 736 JL1SAM 601 700 N8MR 658 675 AF5CC 646 651 JG6CDH 553 605 N6UTC 551 600 WB7VUF 555 572 N5EKO 500 550 N3CAL 480 525 F6GLJ 400 501 N7ZO 350 501 DL6KBG 331 500 SA0UNX 362 463 LA6OP New 458 AD2DD 356 403 KF2T 111 399 N6PAZ 350 369 JH8RZJ New 328 AG4W 161 314 JI5USJ 236 301 AA0MZ 276 277 NJ2DX 100 260 IK8YTA 162 243 N7GR 205 226 KR7LD New 211 PY2YJ 150 210 WD9EWK (DM22) 198 200 WD9EWK (DM31) 187 195 IK0WRB 123 174 W0SX New 134 WK7G New 118 K7AXA New 104 SP7JS New 104 W6CZ New 103 YO6OEV New 103 BA7LVG New 100 ------------------------------------------------------------ Congratulations to the new VUCC holders. W6CZ is first VUCC Satellite holder from DM07 W0SX is first VUCC Satellite holder from DM37 LA6OP is First VUCC Satellite holder from JP67 YO6OEV is First VUCC Satellite holder from KN26 SP7JS is First VUCC Satellite holder from KO00 BA7LVG is First VUCC Satellite holder from OL63 DXCC Satellite Standing February 2024 ------------------------------------------------------------ DXCC Satellite Award/Endorsement Change Summary for January 01, 2024 to February 01, 2024. ------------------------------------------------------------ HB9BZA 158 188 PS8ET 160 178 F4BKV 150 171 G4GIR 163 167 PA3FWP 127 157 EA2AA 154 156 I3BUI 142 155 AC4G 151 152 OZ9AAR 125 151 EA6VQ 127 145 HB9RYZ 141 145 IK4CIE 133 143 HB9GWJ 129 134 RA3DNC 107 131 W5CBF 100 130 DL2QB 100 120 LA0FA 102 109 N3GS 100 108 IK8YTA New 100 ------------------------------------------------------------ Congratulations to the new DXCC Satellite holder. IK8YTA is first DXCC Satellite holder from JN70 73 Jon N7AZ

1 0

Upcoming ARISS Contact Schedule as of 2024-02-01 04:30 UTC
by aj9n＠aol.com 01 Feb '24

01 Feb '24

Upcoming ARISS Contact Schedule as of 2024-02-01 04:30 UTC Quick list of scheduled contacts and events: Alabama School of Cyber Technology and Engineering, Huntsville, AL, direct via N4CTE 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 crewmember is Jasmin Moghbeli KI5WSL The ARISS mentor is W4NTR Contact is go for: Thu 2024-02-01 17:34:50 UTC 52 deg Watch for Livestream at ascteinformation-9116 - YouTube Thrive Home School Academy, Colorado Springs, CO, direct via AFØS 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 crewmember is Loral O’Hara KI5TOM The ARISS mentor is KD8COJ Contact is go for: Fri 2024-02-02 18:21:26 UTC 80 deg Watch for Livestream at http://www.hsd2.org/ (***) Lilburn Elementary School, Lilburn, GA, direct via K4RGK 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 crewmember is Jasmin Moghbeli KI5WSL The ARISS mentor is K4RGK Contact is go for: Wed 2024-02-07 14:24:10 UTC 57 deg School of Telecommunications Engineering, ETSIT Valencia (Universitat Politecnica de Valencia), Valencia, Spain, direct via EA5RKP 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 crewmember is Loral O’Hara KI5TOM The ARISS mentor is IKØUSO Contact is go for: Fri 2024-02-09 08:12:46 UTC 31 deg Note the crewmember and event date change is due to a scheduling conflict. School TBD, Russia, direct via TBD (***) The ISS callsign is presently scheduled to be RSØISS (***) 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 crewmember is Nikolay Chub (***) The ARISS mentor is RV3DR (***) Contact is go for 2024-02-15 08:20 UTC (***) The crossband repeater continues to be active. If any crewmember is so inclined, all they have to do is pick up the microphone, raise the volume up, and talk on the crossband repeater. So give a listen, you just never know. 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 2024-02-01 04:30 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 2024-01-31 15:30 UTC. https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf ####################################################################################################################################### Comments on making general contacts I have been seeing a lot of traffic on Facebook and I suspect on other social media sites with people asking why they are not hearing the crew make general contacts. First off the crew is very busy on the ISS and they simply may not have the time to just pick up the microphone and talk. Also, one needs to be aware of their normal daily schedule. I have listed below the constraints that we at ARISS have to follow in order to schedule the school contacts. Hopefully this will help you better schedule your opportunities. Typical daily schedule Wakeup to Workday start= 1.5 hours Workday start to Workday end=12 hours Workday end to Sleep= 2 hours Sleep to wakeup= 8.5 hours The crew's usual waking period is 07:30 – 19:30 UTC. The most common times to find a crew member making casual periods are about one hour after waking up and about an hour before sleeping, when they have personal time. They're usually free most of the weekend, as well. SSTV events are not that often. So please check out https://www.ariss.org/ for the latest information or watch for the ARISS announcements. And don’t forget that the packet system is sometimes active. Check the status at https://www.ariss.org/ or http://www.issfanclub.eu to see if the packet system is active or not. As always, if there is an EVA, a docking, or an undocking; the ARISS radios are turned off as part of the safety protocol. 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 **************************************************************************************************************************************** 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) Call for Proposals The next proposal window for US schools and educational organizations to host an Amateur Radio contact with a crew member on board the ISS opens October 1, 2023 for contacts to be scheduled for July 1, 2024 – December 31, 2024. This proposal window has been extended and is now due to ARISS by February 29, 2024 at 11:59 PM Pacific Time. (***) Proposal information and more details such as expectations, proposal guidelines and the proposal form can be found at www.ariss.org. Find more information and proposal instructions, visit the ARISS-USA website at: https://ariss-usa.org/hosting-an-ariss-contact-in-the-usa/ 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 congratulates the following mentors who have now mentored over 100 schools: Sergey RV3DR with 222 Francesco IKØWGF with 153 Satoshi 7M3TJZ with 150 Gaston ON4WF with 124 Peter IN3GHZ with 118 Steve VE3TBD with 106 **************************************************************************** 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 1690. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1596. 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, FXØISS, GB1SS, 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 **************************************************************************** SpaceX Crew-7 on orbit Jasmin Moghbeli KI5WSL Andreas Mogensen KG5GCZ Satoshi Furukawa Konstantin Borisov Exp. 70 on orbit Oleg Kononenko Nikolay Chub Loral O’Hara KI5TOM Axiom AX-3 crew on orbit Michael López-Alegría Walter Villadei IUØRWB Alper Gezeravcı KJ5DIY/TA5TRU Marcus Wandt KJ5COO **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

1 0

Re: BeliefSat-0 orbital data restored, reception reports requested
by Joseph B. Fitzgerald 01 Feb '24

01 Feb '24

Sasha Tim wrote: >This entire satellite runs on an Atmega328... You can do a lot with just a little, the Atmaga 328 compares favorably to the computers that took US astronauts to the moon in many ways. Roughly the same memory and computing power, plus the '328 consumes orders of magnitude less space, power, weight and dollars. Saturn and Apollo computers likely were better in radiation resistance and reliability though. AMSAT used radiation hardened RCA COSMAC 1802 on several spacecraft, and I think one is still running on UO-11. That thing ran very slow, with a machine cycle of about 100 kHz, with opcodes taking 2 or 3 cycles to complete. de KM1P Joe

1 0