Any update on AO-85?
As per title. With my limited setup I am not able to decode any telemetry from AO-85 anymore. It still comes through the squelch on my rig+discone, but S/N ratio on my SDR+ArrowAlaska is about half what it normally was and with fading added there is no long enough sequence for decoding frames.
We have not had any time to look at it trying to deal with the launch and testing of AO-95 (Fox-1Cliff). We let it turn into safe mode when it had some odd behavior. However, the safe mode telemetry seems to be fine. I'm surprised that the power seems low to you. It should be sending two strong frame of telemetry and then "resting" for two minutes, then repeating.
On Wed, Dec 5, 2018 at 7:33 PM Hans BX2ABT hans.bx2abt@msa.hinet.net wrote:
As per title. With my limited setup I am not able to decode any telemetry from AO-85 anymore. It still comes through the squelch on my rig+discone, but S/N ratio on my SDR+ArrowAlaska is about half what it normally was and with fading added there is no long enough sequence for decoding frames.
Sent via AMSAT-BB@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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
When I first that AO-85 was having issues and had entered safe mode, I decided I should go out and help collect some of the telemetry with my handheld yagi. From what I recall, I didn't help have any trouble hearing the beacon and was able to get FoxTelem to decode two frames during that one beacon. I then decided it was too cold to wait for the next beacon and went back inside. It did get me thinking, how likely is it that my attempt there to collect those frames was unique? I have credit for them on the dashboard, but were those duplicates from others or were those telemetry packets ones that might never have been captured if I didn't go outside to collect them?
Just curious, Loren K7IW
On Wed, Dec 5, 2018 at 5:20 PM Burns Fisher burns@fisher.cc wrote:
We have not had any time to look at it trying to deal with the launch and testing of AO-95 (Fox-1Cliff). We let it turn into safe mode when it had some odd behavior. However, the safe mode telemetry seems to be fine. I'm surprised that the power seems low to you. It should be sending two strong frame of telemetry and then "resting" for two minutes, then repeating.
On Wed, Dec 5, 2018 at 7:33 PM Hans BX2ABT hans.bx2abt@msa.hinet.net wrote:
As per title. With my limited setup I am not able to decode any telemetry from AO-85 anymore. It still comes through the squelch on my rig+discone, but S/N ratio on my SDR+ArrowAlaska is about half what it normally was and with fading added there is no long enough sequence for decoding frames.
Sent via AMSAT-BB@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!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
First, thank you for doing that! You can never tell what will be important, even days or weeks later.
But as to your question, the data to find the answer probably exists, but it is not a standard thing to get out of the database, so I don't know how to find it.
You can get a general idea within 90 minutes or so by looking on the leaderboard, where it will tell you how many people collected data during the last orbit. Check to see if there are others from 7-land. I know that I once looked and saw that I was the only one despite being in the US Northeast where there are a lot of hams.
Sorry I can't answer the question directly... 73, Burns WB1FJ
With a limited setup and no circular polarization there is always the chance that a sat is just in the wrong angle for me to decode and I take that into account. Right now I compare with the the situation before the anomalies started and it definitely seems "off". I do hear the 2-min beacon transmissions, with the voice ID, but on the waterfall it is clear that the signal is not strong enough to give a S/N ratio above the level which I can decode. E.g. before S/N peaked at 7+ dB, now barely 3 dB and with fading not long enough to decode a DUW frame. HTH,
Hans
BX2ABT
On 12/06/2018 09:11 AM, Burns Fisher wrote:
We have not had any time to look at it trying to deal with the launch and testing of AO-95 (Fox-1Cliff). We let it turn into safe mode when it had some odd behavior. However, the safe mode telemetry seems to be fine. I'm surprised that the power seems low to you. It should be sending two strong frame of telemetry and then "resting" for two minutes, then repeating.
On Wed, Dec 5, 2018 at 7:33 PM Hans BX2ABT <hans.bx2abt@msa.hinet.net mailto:hans.bx2abt@msa.hinet.net> wrote:
As per title. With my limited setup I am not able to decode any telemetry from AO-85 anymore. It still comes through the squelch on my rig+discone, but S/N ratio on my SDR+ArrowAlaska is about half what it normally was and with fading added there is no long enough sequence for decoding frames. _______________________________________________ Sent via AMSAT-BB@amsat.org <mailto:AMSAT-BB@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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
participants (3)
-
Burns Fisher -
Hans BX2ABT -
Loren M. Lang