Fox-1A (AO-85) in safe mode over Europe Jun 5 21:25?
Hello all,
I've been using (the most amazing) http://vhf.pi5fts.nl/ WebSDR to listen to passes on the other side of the globe.
I noticed that Fox-1A was announcing "Safe Mode" with what sounds like 9600 bps telemetry. Is this normal?
I didn't catch the voice announcement, but I do have a WAV file of the telemetry.
--- Zach N0ZGO
It has been dropping into Safe Mode at the end of eclipses for a little while now. It's a planned feature to protect the batteries from excessive discharge.
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Zach Metzinger Sent: Tuesday, June 05, 2018 5:30 PM To: [email protected] Subject: [amsat-bb] Fox-1A (AO-85) in safe mode over Europe Jun 5 21:25?
Hello all,
I've been using (the most amazing) http://vhf.pi5fts.nl/ WebSDR to listen to passes on the other side of the globe.
I noticed that Fox-1A was announcing "Safe Mode" with what sounds like 9600 bps telemetry. Is this normal?
I didn't catch the voice announcement, but I do have a WAV file of the telemetry.
--- Zach N0ZGO _______________________________________________ Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
As a follow-up, if the satellite has an IHU reset while in auto safe mode, it reboots to safe mode. This apparently happened last night or yesterday. I commanded it back to Transponder mode this morning.
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Andrew Glasbrenner Sent: Tuesday, June 05, 2018 5:50 PM To: 'Zach Metzinger' [email protected]; [email protected] Subject: Re: [amsat-bb] Fox-1A (AO-85) in safe mode over Europe Jun 5 21:25?
It has been dropping into Safe Mode at the end of eclipses for a little while now. It's a planned feature to protect the batteries from excessive discharge.
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Zach Metzinger Sent: Tuesday, June 05, 2018 5:30 PM To: [email protected] Subject: [amsat-bb] Fox-1A (AO-85) in safe mode over Europe Jun 5 21:25?
Hello all,
I've been using (the most amazing) http://vhf.pi5fts.nl/ WebSDR to listen to passes on the other side of the globe.
I noticed that Fox-1A was announcing "Safe Mode" with what sounds like 9600 bps telemetry. Is this normal?
I didn't catch the voice announcement, but I do have a WAV file of the telemetry.
--- Zach N0ZGO _______________________________________________ Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Out of curiosity, is there a state diagram anywhere that is publicly available for any or all of the Fox Series, showing the various potential modes and the causes for state transition? I'm mainly interested in using it (or them if there are variants available) as an introductory teaching/training tool for students getting into cubesat development and writing code for flight computers. I've got my own made up versions of what I might guess an overall state diagram might look like and the various causes of state transition for a cubesat (IHU reset, ground command, bus/battery voltage dropping below thresholds, etc.), but it would be much better if I could show a real world example.
Thanks in advance!
Zach, KJ4QLP
Research Associate Aerospace Systems Lab Ted & Karyn Hume Center for National Security & Technology Virginia Polytechnic Institute & State University Work Phone: 540-231-4174 Cell Phone: 540-808-6305
On 6/6/2018 10:08 AM, Andrew Glasbrenner wrote:
As a follow-up, if the satellite has an IHU reset while in auto safe mode, it reboots to safe mode. This apparently happened last night or yesterday. I commanded it back to Transponder mode this morning.
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Andrew Glasbrenner Sent: Tuesday, June 05, 2018 5:50 PM To: 'Zach Metzinger' [email protected]; [email protected] Subject: Re: [amsat-bb] Fox-1A (AO-85) in safe mode over Europe Jun 5 21:25?
It has been dropping into Safe Mode at the end of eclipses for a little while now. It's a planned feature to protect the batteries from excessive discharge.
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Zach Metzinger Sent: Tuesday, June 05, 2018 5:30 PM To: [email protected] Subject: [amsat-bb] Fox-1A (AO-85) in safe mode over Europe Jun 5 21:25?
Hello all,
I've been using (the most amazing) http://vhf.pi5fts.nl/ WebSDR to listen to passes on the other side of the globe.
I noticed that Fox-1A was announcing "Safe Mode" with what sounds like 9600 bps telemetry. Is this normal?
I didn't catch the voice announcement, but I do have a WAV file of the telemetry.
--- Zach N0ZGO _______________________________________________ Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
BTW, the situation is a bit more complicated than just resetting while in auto-safe mode. I tried that with the AO-85 software and could not reproduce that behavior. I also think that I've seen it NOT happen on AO-85. There has to be some timing window that I have not found.
On Wed, Jun 6, 2018 at 10:17 AM, Zach Leffke [email protected] wrote:
Out of curiosity, is there a state diagram anywhere that is publicly available for any or all of the Fox Series, showing the various potential modes and the causes for state transition? I'm mainly interested in using it (or them if there are variants available) as an introductory teaching/training tool for students getting into cubesat development and writing code for flight computers. I've got my own made up versions of what I might guess an overall state diagram might look like and the various causes of state transition for a cubesat (IHU reset, ground command, bus/battery voltage dropping below thresholds, etc.), but it would be much better if I could show a real world example.
Thanks in advance!
Zach, KJ4QLP
Research Associate Aerospace Systems Lab Ted & Karyn Hume Center for National Security & Technology Virginia Polytechnic Institute & State University Work Phone: 540-231-4174 Cell Phone: 540-808-6305
On 6/6/2018 10:08 AM, Andrew Glasbrenner wrote:
As a follow-up, if the satellite has an IHU reset while in auto safe mode, it reboots to safe mode. This apparently happened last night or yesterday. I commanded it back to Transponder mode this morning.
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Andrew Glasbrenner Sent: Tuesday, June 05, 2018 5:50 PM To: 'Zach Metzinger' [email protected]; [email protected] Subject: Re: [amsat-bb] Fox-1A (AO-85) in safe mode over Europe Jun 5 21:25?
It has been dropping into Safe Mode at the end of eclipses for a little while now. It's a planned feature to protect the batteries from excessive discharge.
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Zach Metzinger Sent: Tuesday, June 05, 2018 5:30 PM To: [email protected] Subject: [amsat-bb] Fox-1A (AO-85) in safe mode over Europe Jun 5 21:25?
Hello all,
I've been using (the most amazing) http://vhf.pi5fts.nl/ WebSDR to listen to passes on the other side of the globe.
I noticed that Fox-1A was announcing "Safe Mode" with what sounds like 9600 bps telemetry. Is this normal?
I didn't catch the voice announcement, but I do have a WAV file of the telemetry.
--- Zach N0ZGO _______________________________________________ Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
participants (4)
-
Andrew Glasbrenner -
Burns Fisher -
Zach Leffke -
Zach Metzinger