Nusat-1 and Nusat2
Hi folks,
I want to know if the Nusat-1 and Nusat-2 are active.
Also I read that Nusat-1 and Nusat-2 has a beacon at 38k4 baud.
I would like to know if it is the same 38k4 baud of the old satellites
Like MO-46 and UO-36 or if there anyone active at that velocity.
Thanks
73 de Enzo IK8OZV EasyLog 5 BetaTester EasyLog PDA BetaTester WinBollet BetaTester D.C.I. CheckPoint Regione Campania Skype: ik8ozv8520
******************************************* ****** GSM +39 328 7244294 ****** ***** SMS +39 328 7244294 ***** *******************************************
Telemetry from both of those satellites is quite active; while it's fun receiving the RF and pulling out the raw hex data, unfortunately there is currently NOT a decoder that I am aware of to display meaningful values.
The bulk of the work to get us this far was done by Dani Estevez. His work is extraordinary and is documented at:
http://destevez.net/2016/06/trying-to-decode-data-from-nusat/
... and while both my hardware and knowledge lags way behind Dani's, here is an example of the signal & data that is possible:
https://twitter.com/scott23192/status/751649344084971520
-Scott, K4KDR Montpelier, VA USA
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-----Original Message----- From: Vincenzo Mone Sent: Monday, August 08, 2016 5:22 PM To: Amsat - BBs Subject: [amsat-bb] Nusat-1 and Nusat2
Hi folks,
I want to know if the Nusat-1 and Nusat-2 are active.
Also I read that Nusat-1 and Nusat-2 has a beacon at 38k4 baud.
I would like to know if it is the same 38k4 baud of the old satellites
Like MO-46 and UO-36 or if there anyone active at that velocity.
Thanks
73 de Enzo IK8OZV EasyLog 5 BetaTester EasyLog PDA BetaTester WinBollet BetaTester D.C.I. CheckPoint Regione Campania Skype: ik8ozv8520
******************************************* ****** GSM +39 328 7244294 ****** ***** SMS +39 328 7244294 ***** *******************************************
El 09/08/16 a las 04:31, Scott escribió:
Telemetry from both of those satellites is quite active; while it's fun receiving the RF and pulling out the raw hex data, unfortunately there is currently NOT a decoder that I am aware of to display meaningful values.
The bulk of the work to get us this far was done by Dani Estevez. His work is extraordinary and is documented at:
http://destevez.net/2016/06/trying-to-decode-data-from-nusat/
Thanks for linking my blog, Scott. Unfortunately that's all we can do by now.
The satellite uses CBOR to compress the telemetry into small binary packets. Some of the guys at Satellogic (the company that operates the satellites) were going to send me some details, but nothing received so far. Probably it's not so easy and they're busy enough.
The downside is that we don't even have a way to check that the packets are received without bit errors. The last 4 bytes of the packet seem to be the ones which vary the most, so kudos if someone can recognise that as a CRC of the packet. I tried for a while, but got nothing.
By the way, it's 40k baud, not 38k4. It eats a huge chunk of spectrum (about 80kHz).
73,
Dani.
participants (3)
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Dani EA4GPZ -
Scott -
Vincenzo Mone