- AMSAT-BB - mailman.amsat.org

Re: [amsat-bb] 9.6k woes and FoxTelem
by Kevin Zari 11 Oct '18

11 Oct '18

OK, I will try all of the suggestions when I am back at the house with a nice pass. Thank you all -Kevin (KK4YEL) ----- The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence. > On Oct 10, 2018, at 10:52, KERRY LA*DUKE <kladuke1144(a)msn.com> wrote: > > Try setting levels much lower. Start at 0 and bring up until oval apears. > > wc7v

1 0

Delayed Telemetry Decoding
by Loren M. Lang 11 Oct '18

11 Oct '18

Normally, I decode telemetry live from the satellite and upload it immediately. I have an RTL-SDR attached to my Android phone and use SDRTouch to demodulate the FM signal feeding the headphone out to my laptop running FoxTelem to decode the frames and upload it through my home's Wi-Fi. However, with the weather turning and the difficultly of getting everything set up, I was wondering if there are any issues with recording the audio or IQ signal on my phone during the pass and feeding it into FoxTelem from my phone later. Does it use my computer's local time or expected to be the live stream, or does it just rely on the time stamp in the decoded packets for ordering the telemetry data whenever it's received? And on that, if I can decode later, is there a time limit I should follow for decoding older data? If I captured a satellite pass in the morning before leaving for work, but didn't feed it into FoxTelem for decode until the evening when I get back home? And lastly, I know it's a different group operating it, but I'm curious if it's a similar policy for AO-73, the first FUNcube sat for decoding packets delayed from their capture time. Thanks for the info! 73s, Loren AG7NC

3 2

6-arm Lindenblad?
by Ed Krome 10 Oct '18

10 Oct '18

The normal Lindenblad omnidirectional circularly polarized antenna has 4 canted dipoles in a circle. If made from 300 ohm twin lead, it has a feed impedance of 75 ohms. Has anybody built/modeled or seen one made with 6 dipoles? 6 would give a 50 ohm feed and maybe more gain. Ideas? Ed Krome K9EK Sent from my iPhone

1 0

AO-92 Ops this week
by Andrew Glasbrenner 10 Oct '18

10 Oct '18

Good Afternoon all, This week we will be doing some a few things with AO-92 out of the ordinary. First, we will again attempt to image a hurricane (Michael this time) with the Virginia Tech camera onboard AO-92. This will take place Wednesday and Thursday mornings on the passes over the Gulf of Mexico. When you hear me announce the mode change or the command signals on the repeater, please stand by. All stations are encouraged to set up FoxTelem to copy the high speed data during these passes. Second, at the request of the folks at Microwave Update, we will switch to L/v Thursday night for 24 hours. It is my understanding there will be some testing of new antennas for the L band uplink at their antenna range onsite. I don't anticipate to run L/v on Sunday as normal. All this is assuming Hurricane Michael stays on track and doesn't swerve east and rearrange or force me to lower my antennas. 73, Drew KO4MA

4 3

Tomorrow's ARISS contact with Ashford School cancelled
by David Jordan 10 Oct '18

10 Oct '18

PLEASE MAKE NOTE! The Wednesday Oct. 10 ARISS contact with Ashford School in Ashford, CT has been cancelled for tomorrow. Attempts are underway to reschedule as soon as possible. Dave, AA4KN ARISS PR Get Outlook for Android

1 0

Sat ops from Svalbard
by adrian＠liggins.ca 10 Oct '18

10 Oct '18

Hi folks, Halvard, LA7XK will be on Svalbard Island with a contest station, but will also be working the sats using the call JW7XK and also possibly (JW9DL), as follows: "We will arrive in Longyearbyen early afternoon local time Wednesday 10 We hope to be QRV on FO-29 from orbit 9358 on Wednesday or maybe on the next orbit. We hope to be on the sat both on SSB and CW for as many orbits as possible until Saturday noon local time (around 10:00 UTC) The contest starts at 1200UTC on Saturday and ends at 1200 UTC on Sunday. We will have time fore some orbits on Sunday afternoon local time. Monday we are packing up to fly home." Halvard will have email access in Svalbard: hal-erik(a)online.no Adrian VA3NNA

1 0

FUNcube operations
by Graham Shirville 10 Oct '18

10 Oct '18

Hi All, FUNcube-1 As you will know, AO73/FUNcube-1 has been in full sunlight for over one month and has been transmitting continuously high power telemetry for most of that time. This has now been changed to full time amateur mode so the transponder is once again available. With the more stable on board temperatures being experienced, this means that the transponder frequencies are also now more stable. We expect to leave it in this mode for some weeks so that the team can determine whether or not the currents flowing from the solar panels are having any noticeable effect on the spin period. FUNcube-2 The FUNcube-2 transponder on UKube-1 continues to be in full time transponder mode. There are occasional breaks in service for a few seconds when the OBC reboots and the other onboard transmitter sends its CW beacon. FUNcube -3 on Nayif-1 EO88/Nayif-1 continues to perform nominally with high power telemetry when in sunlight and amateur mode when in eclipse. With their slightly different orbital characteristics it is useful that AO73 is now the early bird, EO88 comes over in the mid morning and UKube provides coverage in the afternoon. We have been suffering from some network issues in relation to uploading the telemetry from the Dashboards to the Data Warehouse over the past couple of weeks. Apologies for this, but hopefully everything is now stable again. ie fingers are still crossed. Thank you for all the telemetry that you upload. Like many other teams, we are presently waiting for the next Space-X launch from Vandenberg which is expected to be carrying a number of new amateur payloads, These will provide additional transponder and STEM capabilities for the amateur satellite service. Exciting times ahead. 73 Graham G3VZV

3 3

Zhou Enlai
by Frank G 10 Oct '18

10 Oct '18

Has anyone copied this sat on East Coast USA passes ? Not a lot of information around as to its status. Thanks 73 Frank WA2NDV

1 0

Antennas for AO-92 23cm
by Ronald G. Parsons 10 Oct '18

10 Oct '18

What antennas are being used for AO-92 23cm? Is polarization changing a problem. How much uplink power is required? Ron W5RKN

5 4

Upcoming ARISS contact with Ashford School, Ashford, CT
by n4csitwo＠bellsouth.net 09 Oct '18

09 Oct '18

An International Space Station school contact has been planned with participants at Ashford School, Ashford, CT on 10 Oct. The event is scheduled to begin at approximately 18:39 UTC. The duration of the contact is approximately 9 minutes and 30 seconds. The contact will be direct between NA1SS and KZ1M. The contact should be audible over the state of Connecticut and adjacent areas. Interested parties are invited to listen in on the 145.80 MHz downlink. The contact is expected to be conducted in English. Students at Ashford School are busy learning about Space in preparation for their ARISS contact. The sixth graders made model rockets while learning about force, the elementary students are coding robots on a Giant Mars Map (thanks to the Share Space Foundation), middle school students are creating robotic arms that can take simulated rock samples, and all the students will get to build an FM radio with snap circuits to learn more about how radios work. Participants will ask as many of the following questions as time allows: 1. Do you wear sunscreen on the International Space Station? 2. Do butterflies just float on the International Space Station or do they use their wings to fly? 4. What is strangest thing you have ever seen in Space? 5. How do you protect yourself from meteors on the International Space Station? 6. What food is the most fun or the messiest to eat in Space? 7. What inspired you to become an astronaut and who do you look up to? 8. What is the hardest thing about having zero gravity? 9. If someone becomes sick, then what do you do? 10. Have you ever been in an emergency situation on the ISS and what was the solution to that problem? 11. What powers rockets? 12. Do you think humans will go to Mars? 13. How long before we go to Mars? 14. What kinds of technology do you use on the Space Station? 15. What does it feel like emotionally to be in Space, and to see the world from such a unique perspective? 16. How many flips have you done in a row? 17. Can you get dizzy in Space? PLEASE CHECK THE FOLLOWING FOR MORE INFORMATION ON ARISS UPDATES: Visit ARISS on Facebook. We can be found at Amateur Radio on the International Space Station (ARISS). To receive our Twitter updates, follow @ARISS_status Next planned event(s): 1. Kursk University, direct via TBD The ISS callsign is presently scheduled to be RSØISS The scheduled astronaut is Sergei Propopev Contact is a go for Fri 2018-10-12 10:40 UTC 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 Center for the Advancement of Science in Space (CASIS) and National Aeronautics and Space Administration (NASA). The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEM) topics by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or informal education venues. With the help of experienced amateur radio volunteers, ISS crews speak directly with large audiences in a variety of public forums. Before and during these radio contacts, students, teachers, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org, www.amsat.org, and www.arrl.org. Thank you & 73, David - AA4KN --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

1 0