[amsat-bb] Fwd: USNAP1 lives! - capture UHF data pse -UPDATE

[Robert Bruninga]

We are guessing at the 437.605 center freq.  It was purchased as 437.600
but we think we remember it did better at 437.605 on one of our radios.



Do you see an offset?  If so, simply ceneter where you see it. And see if
decodes are better.

Thanks

Bob



*From:* Alan Johnston <alan.b.johnston at gmail.com>
*Sent:* Friday, July 26, 2019 12:26 PM
*To:* Robert Bruninga <bruninga at usna.edu>
*Cc:* amsat bb <amsat-bb at amsat.org>; Jeff King <jking at usna.edu>; Jin Kang <
kang at usna.edu>
*Subject:* Re: [amsat-bb] Fwd: USNAP1 lives! - capture UHF data pse -UPDATE



Hi Bob,



At SatNOGS, we are getting some good 437.605 MHz 9k6 signals from
BRICSat-2/USNAP-1 .  They haven't automatically decoded yet, perhaps due to
the 5kHz frequency offset.  But you can download the audio file and you
should be able to decode them.



Here are some good ones:



https://network.satnogs.org/observations/861257/

https://network.satnogs.org/observations/861256/

https://network.satnogs.org/observations/861250/



Future good observations will be displayed here:



https://network.satnogs.org/observations/?future=0&bad=0&unvetted=0&failed=0&norad=99970&observer=&station=&start-time=&end-time=



Good luck!!



73,

Alan

KU2Y



On Fri, Jul 26, 2019 at 8:22 AM Robert Bruninga via AMSAT-BB <
amsat-bb at amsat.org> wrote:

USNAP1 on 145.825 also uses the call of

USNA14 on 437.605 MHz 9600 baud



And has been added to the http://aprs.org/sats.html web page



*From:* Robert Bruninga <bruninga at usna.edu>
*Sent:* Thursday, July 25, 2019 11:56 PM
*To:* amsat bb <amsat-bb at amsat.org>
*Cc:* Jin Kang <kang at usna.edu>; Jeffery King <jking at usna.edu>; Robert
Bruninga <bruninga at usna.edu>
*Subject:* Re: [amsat-bb] Fwd: USNAP1 lives! - capture UHF data pse -UPDATE



FREQ is 437.605 (corrected)

Object is 44355

I captured objects via VK6HAM at 151929 to 152812 for PSAT2 and for USNAP1
from 151803 to 152711 showing USNA P1 about a minute ahead of PSAT2.

It is only alive for about 60 to 70 minutes when in the sun apparently by
looking at the T# telemetry count.

Bob



On Thu, Jul 25, 2019 at 11:42 PM Robert Bruninga <bruninga at usna.edu> wrote:

Standard 9600 baud AX.25.  No special software.  Just need raw packets.on
447.605

PSAT2 and USNAP1 were delppyed together and have identical external shape
and so should be in same orbit, but due to mass differences, USNAP1 should
be LEADING PSAT2.  We need to know by houw much.  Since PSAT2 is likely
object 44354, and 44355 is very slightly leading (by 1 minute) that could
be it.

Bob



On Thu, Jul 25, 2019 at 11:33 PM Jeff Moore via AMSAT-BB <amsat-bb at amsat.org
>
wrote:

So what do we need to copy the downlink data??   Is there an app or is it
straight ax.25 packet???

Jeff Moore  --  KE7ACY
CN94

On Thu, Jul 25, 2019 at 8:27 PM Robert Bruninga via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> It looks liike PSAT2's sister cubesat finally woke up today (a month after
> launch) at 0614z on 25 July:
>
> http://www.findu.com/cgi-bin/raw.cgi?call=usnap1-1&time=1
>
> The VHF telemetry shown here has only bus voltage.  The digipeater is OFF
> and will remain off until we find out what happened.
>
> In the mean time, we need all the capture we can get of the 9600 baud
> downlink on 437.605 MHz +/- Doppler.  There is a beacon every 30 seconds.
>
> Bob, WB4APR
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_______________________________________________
Sent via AMSAT-BB at 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 at 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