For anyone decoding images and using FoxTelem with Doppler Tracking enabled I would appreciate any feedback on how high speed data is being decoded. Especially if you decoded camera frames in previous runs, like last October, and can compare.
This was a new feature and previously tracking of the high speed signal was not great. Let me know if it is better (or worse!)
73 Chris
I just received my first HS data from AO-92. Nothing was decoded using FoxTelem, but I got the IQ file to play around with. It was a low pass for me, so signals were only 20 db over noise using my AirSpy mini. That might be too little, although I can receive Falconsat-3 at those levels without any problems.
What are the settings to watch out for decoding HS data (deviation, soundcard, Foxtelem)? Or should it "just work"? The only difference I can see between FS-3 and AO-92 is that audio from GQRX is going out to PacSat Ground Station via UDP and Foxtelem gets it from GQRX via a virtual audio loop (set in Pavucontrol).
Still exited to receive AO-92 with HS data for the first time. I saw on Twitter that JA0CAW did get part of an image, so for him it did work.
73 de Hans
BX2ABT
On 07/11/2019 10:27 AM, Chris Thompson via AMSAT-BB wrote:
For anyone decoding images and using FoxTelem with Doppler Tracking enabled I would appreciate any feedback on how high speed data is being decoded. Especially if you decoded camera frames in previous runs, like last October, and can compare.
This was a new feature and previously tracking of the high speed signal was not great. Let me know if it is better (or worse!)
73 Chris
Hi Hans.
While not GQRX, if you'd like to use the screen shot of HDSDR in an old tweet I posted some time ago, you can see the RF and Audio-Out bandwidth settings required to successfully forward AO-92's high-speed data stream to FoxTelem:
https://twitter.com/scott23192/status/953288770555645952
... in short, around 20k worked well for both RF and Audio-Out. 15k is usually perfect for most 9600 baud data, but to err on the side of caution I had found that 20k produced good results with AO-92's camera data stream. The real deal-breaker for the higher data rates is filtering the audio output at too narrow of a bandwidth. That'll get you every time.
GQRX has a little "..." menu that's easy to overlook right beside the demod MODE selection. For a data stream like AO-92's you'll want either the 17k or 25k setting. Experiment and see what works best!
-Scott, K4KDR
=======================
On Wed, Jul 10, 2019 at 11:28 PM Hans BX2ABT via AMSAT-BB < amsat-bb@amsat.org> wrote:
I just received my first HS data from AO-92. Nothing was decoded using FoxTelem, but I got the IQ file to play around with. It was a low pass for me, so signals were only 20 db over noise using my AirSpy mini. That might be too little, although I can receive Falconsat-3 at those levels without any problems.
What are the settings to watch out for decoding HS data (deviation, soundcard, Foxtelem)? Or should it "just work"? The only difference I can see between FS-3 and AO-92 is that audio from GQRX is going out to PacSat Ground Station via UDP and Foxtelem gets it from GQRX via a virtual audio loop (set in Pavucontrol).
Still exited to receive AO-92 with HS data for the first time. I saw on Twitter that JA0CAW did get part of an image, so for him it did work.
73 de Hans
BX2ABT
On 07/11/2019 10:27 AM, Chris Thompson via AMSAT-BB wrote:
For anyone decoding images and using FoxTelem with Doppler Tracking
enabled
I would appreciate any feedback on how high speed data is being decoded. Especially if you decoded camera frames in previous runs, like last October, and can compare.
This was a new feature and previously tracking of the high speed signal
was
not great. Let me know if it is better (or worse!)
73 Chris
Chris,
I was unsuccessful using FoxTelem’s ‘baked in’ RTL-SDR support to copy HS TLM last night. Today, piping HDSDR into FoxTelem I copied 6 frames.
Will try HS again on the next pass but it’s marginal for me.
Windows 10; Java 8; 1.07y
73, Mike
Michael Styne K2MTS mstyne@k2mts.org
On Jul 10, 2019, at 22:27, Chris Thompson via AMSAT-BB amsat-bb@amsat.org wrote:
For anyone decoding images and using FoxTelem with Doppler Tracking enabled I would appreciate any feedback on how high speed data is being decoded. Especially if you decoded camera frames in previous runs, like last October, and can compare.
I snuck home for lunch today to copy the 71 degree pass over southern Maryland. Great signal but too bad my Icom IC-9700 won't handle /pass that wide of bandwidth!
Cal/N3CAL
-----Original Message----- From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Michael Styne via AMSAT-BB Sent: Thursday, July 11, 2019 12:39 PM To: Chris Thompson Cc: amsat-bb@amsat.org Subject: Re: [amsat-bb] AO-92 in Camera Mode
Chris,
I was unsuccessful using FoxTelem’s ‘baked in’ RTL-SDR support to copy HS TLM last night. Today, piping HDSDR into FoxTelem I copied 6 frames.
Will try HS again on the next pass but it’s marginal for me.
Windows 10; Java 8; 1.07y
73, Mike
Michael Styne K2MTS mstyne@k2mts.org
On Jul 10, 2019, at 22:27, Chris Thompson via AMSAT-BB amsat-bb@amsat.org wrote:
For anyone decoding images and using FoxTelem with Doppler Tracking enabled I would appreciate any feedback on how high speed data is being decoded. Especially if you decoded camera frames in previous runs, like last October, and can compare.
_______________________________________________ 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: https://www.amsat.org/mailman/listinfo/amsat-bb
It will I’m nearly certain. . Use IF mode out the USB cable into Foxtelem!
Mark N8MH
On Thu, Jul 11, 2019 at 1:15 PM Cal Spreitzer via AMSAT-BB < amsat-bb@amsat.org> wrote:
I snuck home for lunch today to copy the 71 degree pass over southern Maryland. Great signal but too bad my Icom IC-9700 won't handle /pass that wide of bandwidth!
Cal/N3CAL
-----Original Message----- From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Michael Styne via AMSAT-BB Sent: Thursday, July 11, 2019 12:39 PM To: Chris Thompson Cc: amsat-bb@amsat.org Subject: Re: [amsat-bb] AO-92 in Camera Mode
Chris,
I was unsuccessful using FoxTelem’s ‘baked in’ RTL-SDR support to copy HS TLM last night. Today, piping HDSDR into FoxTelem I copied 6 frames.
Will try HS again on the next pass but it’s marginal for me.
Windows 10; Java 8; 1.07y
73, Mike
Michael Styne K2MTS mstyne@k2mts.org
On Jul 10, 2019, at 22:27, Chris Thompson via AMSAT-BB <
amsat-bb@amsat.org> wrote:
For anyone decoding images and using FoxTelem with Doppler Tracking
enabled
I would appreciate any feedback on how high speed data is being decoded. Especially if you decoded camera frames in previous runs, like last October, and can compare.
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: https://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: https://www.amsat.org/mailman/listinfo/amsat-bb
Ok, thanks Mark! I will give it another try using IF mode out on USB with FM-Data selected and see what I get. I read somewhere where you get about 16k that way but was thinking you need 20k for it to work?
Cal/N3CAL
From: Mark L. Hammond [mailto:marklhammond@gmail.com] Sent: Thursday, July 11, 2019 1:50 PM To: Cal Spreitzer Cc: amsat-bb@amsat.org Subject: Re: [amsat-bb] AO-92 in Camera Mode
It will I’m nearly certain. . Use IF mode out the USB cable into Foxtelem!
Mark N8MH
On Thu, Jul 11, 2019 at 1:15 PM Cal Spreitzer via AMSAT-BB amsat-bb@amsat.org wrote: I snuck home for lunch today to copy the 71 degree pass over southern Maryland. Great signal but too bad my Icom IC-9700 won't handle /pass that wide of bandwidth!
Cal/N3CAL
-----Original Message----- From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Michael Styne via AMSAT-BB Sent: Thursday, July 11, 2019 12:39 PM To: Chris Thompson Cc: amsat-bb@amsat.org Subject: Re: [amsat-bb] AO-92 in Camera Mode
Chris,
I was unsuccessful using FoxTelem’s ‘baked in’ RTL-SDR support to copy HS TLM last night. Today, piping HDSDR into FoxTelem I copied 6 frames.
Will try HS again on the next pass but it’s marginal for me.
Windows 10; Java 8; 1.07y
73, Mike
Michael Styne K2MTS mstyne@k2mts.org
On Jul 10, 2019, at 22:27, Chris Thompson via AMSAT-BB amsat-bb@amsat.org wrote:
For anyone decoding images and using FoxTelem with Doppler Tracking enabled I would appreciate any feedback on how high speed data is being decoded. Especially if you decoded camera frames in previous runs, like last October, and can compare.
_______________________________________________ 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: https://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: https://www.amsat.org/mailman/listinfo/amsat-bb
participants (6)
-
Cal Spreitzer -
Chris Thompson -
Hans BX2ABT -
Mark L. Hammond -
Michael Styne -
Scott