[amsat-bb] NEXUS identified

[Carlos Picoto]

Hi Mike,



Thanks for your reply.



I just went looking for this packet on the replay of the IQ recording and I don’t see any evidence of it. So not sure what Direwolf decoded in this case.



To answer your questions, I use my own implementation in C# of the SiDS protocol, it only does double checking against callsign for AX.25 packets and you correctly point out this is not a valid one.



On the Satnogs side it might get discarded afterwards but it does show the submission



Telemetry (frames)

Frames: 1 Latest frame submitted on 2019-01-23 19:36:55 by AD7NP-CN87vp







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________________________________
From: Mike Rupprecht <mail at mike-rupprecht.de>
Sent: Thursday, January 24, 2019 8:11:05 AM
To: 'Carlos Picoto'
Cc: 'Pierros Papadeas'; 'Jean-Pierre Godet'; amsat-bb at amsat.org
Subject: AW: [amsat-bb] NEXUS identified

Carlos,

may I ask you which telemetry forwarder do you use?

This is neither a valid AX.25 packet nor a NEXUS packet. A good one looks
like this:

9C8AB0AAA6406094A662B282AC6103F0A10002E50300009B829001010101010D520098014405
DC00D901280926066909CE09EA09250948095C09F309EF0A0509D6090C090B0A470A01095209
E109D775DE4ADD4ED90067FF41004E08CA07D9097C07E500

I wonder if SatNOGS has accepted this paket.

73 Mike
DK3WN


-----Ursprüngliche Nachricht-----
Von: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] Im Auftrag von Carlos
Picoto
Gesendet: 24 January 2019 04:21
An: Jean-Pierre Godet; amsat-bb at amsat.org
Betreff: Re: [amsat-bb] NEXUS identified

Just noticed I have what could be a NEXUS packet on my log with 2.6 degrees
of elevation.



BA:E7:F8:3D:63:3D:DC:A5:6F:13:2B:87:ED:06:80:2E:BC:FF:48:8A:1C:0C:6B



>From [R7Cv] To []s|1]

[2019-01-23T19:36:55.620Z] Sat: NEXUS

 Reporting URL: https://db.satnogs.org/api/telemetry/

Frame:
noradID=43937&source=AD7NP&timestamp=2019-01-23T19:36:55.620Z&frame=BAE7F83D
633DDCA56F132B87ED06802EBCFF488A1C0C6B&locator=longLat&longitude=122.21W&lat
itude=47.65N&tncPort=0&azimuth=248.8&elevation=2.6&fDown=435892162



Carlos

AD7NP



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10



________________________________
From: AMSAT-BB <amsat-bb-bounces at amsat.org> on behalf of Jean-Pierre Godet
<godetj at wanadoo.fr>
Sent: Sunday, January 20, 2019 1:22:45 PM
To: amsat-bb at amsat.org
Subject: Re: [amsat-bb] NEXUS identified

   With 43937 / 2019-003F the Doppler shift tracking is now perfect (and
with 003B for OrigamiSat),

   Many thanks Nico, 73 !

   Jean-Pierre F5YG

On 20/01/19 11:44 AM, Nico Janssen wrote:
>
> With increased separation it is now clear that NEXUS is object 43937,
> 2019-003F. Downlink 437.0732 MHz.
>
> 73,
> Nico PA0DLO
>
> On 18-01-19 21:03, Nico Janssen wrote:
>>
>> With an unexpected new TLE set published, NEXUS now has a slightly
>> better match with object 43940, 2019-003J. Apparently TLEs have not
>> yet stabilized.
>>
>> 73, Nico PA0DLO
>>
>> On 18-01-19 14:07, Nico Janssen wrote:
>>>
>>> Doppler measurements show that NEXUS is object 43938, 2019-003G.
>>> Downlink: 437.0732 MHz.
>>>
>>> 73,
>>> Nico PA0DLO
>>>
>>>
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