Hi, I've received two burst during last pass of NO-84 over EU, signal quite good with a bit of qsb on 435.350MHz. I've recorded the audio and than processed with fldig using BPSK-31: phase scope looks good and what I've decoded is just:
252 00 23 804 242 +20 2n B 252 00 23 804 242 +20 gy
that seems resonable data (beacon B, partial first packet) and is similar on what I've read here:
dk3wn.info/files/psat_talk_dk3wn_Amsatuk_colloq_2015.pdf
and here:
http://www.urel.feec.vutbr.cz/esl/files/Projects/PSAT/P%20sat%20transponder%...
But how can I decode it? I haven't an HF TX so I cannot test uplink so I would try to get telemetry better. One more question: is normal just two burst during a 10min pass?
Many thanks!
73, Lapo IK5NAX
Yes, two transmit periods during a 10 minute pass seems normal. You can see this if you pull up completed observations on the SatNogs network:
https://network.satnogs.org/observations/?future=0&bad=0&unknown=0&a...
Actually, this observation seems to indicate that maybe the interval is closer to 250 seconds?
https://network.satnogs.org/observations/3625034/
---Roy K3RLD
20:20 Fri 12 Feb 21 , Roy Dean wrote:
Yes, two transmit periods during a 10 minute pass seems normal. You can see this if you pull up completed observations on the SatNogs network:
https://network.satnogs.org/observations/?future=0&bad=0&unknown=0&a...
You are right, SatNOGS is a great resource (I should put in operation my SatNOGS station ID 1028).
Actually, this observation seems to indicate that maybe the interval is closer to 250 seconds?
Yes, that's very close to what I received, thank you!
73, Lapo IK5NAX
Hi Lapo,
the decoder for PSK tlm you can find at Mike's page https://www.dk3wn.info/wp/digital/
just search for Parkinsonsat. Or you can find description of the channels on our pages for PSK transponder here under PSAT:
http://www.urel.feec.vutbr.cz/esl/
Hope that it will help, good luck with experimenting.
Tomas OK2PNQ
Dne 12/02/2021 v 18:56 Lapo Pieri napsal(a):
Hi, I've received two burst during last pass of NO-84 over EU, signal quite good with a bit of qsb on 435.350MHz. I've recorded the audio and than processed with fldig using BPSK-31: phase scope looks good and what I've decoded is just:
252 00 23 804 242 +20 2n B 252 00 23 804 242 +20 gythat seems resonable data (beacon B, partial first packet) and is similar on what I've read here:
dk3wn.info/files/psat_talk_dk3wn_Amsatuk_colloq_2015.pdfand here:
http://www.urel.feec.vutbr.cz/esl/files/Projects/PSAT/P%20sat%20transponder%20WEB%20spec02.htmBut how can I decode it? I haven't an HF TX so I cannot test uplink so I would try to get telemetry better. One more question: is normal just two burst during a 10min pass?
Many thanks!
73, Lapo IK5NAX
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Hi Tomas,
20:14 Sat 13 Feb 21 , Tomáš Urbanec wrote:
the decoder for PSK tlm you can find at Mike's page https://www.dk3wn.info/wp/digital/
Yes, I'm struggling with win to try to use it: I no more use proprietary sw (since 1998) and I've a dedicate computer to run non-free sw, and it's not easy...
just search for Parkinsonsat. Or you can find description of the channels on our pages for PSK transponder here under PSAT:
Nice, thank you: that's what I was looking for, I'll write a small parser to plot data (on gnuplot), faster than struggling with wine ;-)
Hope that it will help, good luck with experimenting.
Sure, thank you!
73, Lapo IK5NAX
participants (3)
-
Lapo Pieri -
Roy Dean -
Tomáš Urbanec