[amsat-bb] fossasat

[Scott]

I saw the slightest trace of the RTTY signal on 8-Dec, but nothing remotely 
strong enough to decode.  Here's my tweet from that pass w/ a screen shot:

https://twitter.com/scott23192/status/1203668726584881157

... seems there is a good chance that the antennas, solar panels, or maybe 
both did not deploy.  Fortunately a few large antenna array stations around 
the world have received some RTTY downlinks clear enough to decode, so at 
least the satellite is alive.

On a related note, besides the extreme low signal strength, a hurdle 
developed to make decoding of the LoRa portion of the downlink more 
difficult to decode.  They've determined that the more readily available 
SX1278 LoRa radio chip that many of us are setup with will -not- be able to 
decode the packets from the satellite's SX1268 chip except under very 
specific (and unlikely) character combinations.  In particular, it seems 
that the 'sync word' programmed into the satellite for transmission over its 
SX1268 LoRa radio is not compatible with our SX1278 LoRa radios on the 
ground.

You can purchase SX1268 LoRa radio chips, but not in a form that's as easy 
to use as the SX1278.  So, between that glitch & the low signal strength, 
for the moment a LoRa decode might be a long-shot.

-Scott,  K4KDR

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-----Original Message----- 
From: Nick Pugh via AMSAT-BB
Sent: Wednesday, December 11, 2019 9:35 AM
To: amsat-bb at amsat.org
Subject: [amsat-bb] fossasat

Has anyone of the list able copy fossasat?
nick

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