Doppler correction between AOS and LOS
Hi to all, a friend of mine, has satpc32 with and SDR. We have the doppler correction, when the satellites it's in AOS, de frequency it's OK, in TCA has (for example) 1 KHz difference, and in LOS has 2 KHz difference.
It's there any configuration to modify??? all the satellites that we found, in AOS has the correct frequency, but in TCA and LOS its not the same as we can see in the waterfall of HDSDR.
Ir i compare the doppler with http://www.amsat.org.ar/pass.htm the frequency has the same between the waterfall and the webpage.
Thanks in advance.
Mati LU9CBL
Make sure in your tracking program, you didn't accidentally enter a silly wrong altitude value for your qth. I had an issue here, where my altitude got changed to 30,000 meters...it caused very similar issues with doppler tracking at various points during the pass, especially at TCA.
73, N0AN Hasan
On Thu, Nov 26, 2020 at 6:30 PM lu9cbl--- via AMSAT-BB [email protected] wrote:
Hi to all, a friend of mine, has satpc32 with and SDR. We have the doppler correction, when the satellites it's in AOS, de frequency it's OK, in TCA has (for example) 1 KHz difference, and in LOS has 2 KHz difference.
It's there any configuration to modify??? all the satellites that we found, in AOS has the correct frequency, but in TCA and LOS its not the same as we can see in the waterfall of HDSDR.
Ir i compare the doppler with http://www.amsat.org.ar/pass.htm the frequency has the same between the waterfall and the webpage.
Thanks in advance.
Mati LU9CBL
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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: https://www.amsat.org/mailman/listinfo/amsat-bb
Hello Everybody,
Today morning I run to test a new setup in JO92he for APRS via digipeaters on satellites on 145.825MHz. I do not control it all the time, but at ~14:35UTC I heard two not very good quality APRS packages. I immediately checked the screen of the radio. I saw only something like PSAT??. Both PCSAT (NO44) and PSAT2 (NO104) were far away from my location. It was about 10 minutes before AOS for the ISS.
Where else we have APRS digipeaters on 145.825 MHz in the sky? Thank you.
73, Armand SP3QFE
Hello Armand, these are the APRS sat digipeating on 145.825 Mhz I have on my GPredict data set:
LAPAN-A2 (IO-86) NO-44 (*) NO-84 PSAT2 (NO-104)
(*) Almost no activity according to https://www.amsat.org/status/
Hope it helps
73, Fabrizio IU5GEZ
Il giorno ven 27 nov 2020 alle ore 16:05 Armand SP3QFE via AMSAT-BB < [email protected]> ha scritto:
Hello Everybody,
Today morning I run to test a new setup in JO92he for APRS via digipeaters on satellites on 145.825MHz. I do not control it all the time, but at ~14:35UTC I heard two not very good quality APRS packages. I immediately checked the screen of the radio. I saw only something like PSAT??. Both PCSAT (NO44) and PSAT2 (NO104) were far away from my location. It was about 10 minutes before AOS for the ISS.
Where else we have APRS digipeaters on 145.825 MHz in the sky? Thank you.
73, Armand SP3QFE _______________________________________________ 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: https://www.amsat.org/mailman/listinfo/amsat-bb
participants (4)
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Armand SP3QFE -
Fabrizio Carrai -
Hasan N0AN -
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