A few days ago I was asking here if anyone knows the CW broadcast format of KOSEN-1 (See the post HERE)
I come again to ask if anyone knows the CW transmission format of CosmoGirl-Sat.
I looked on the internet but didn’t find anything concrete and I really wanted to understand what the satellite transmits. I contacted the team via the email provided in the IARU coordination, but there was no response until then
Contrary to this format, they apparently decided to put the satellite’s callsign (JS1YOI) in the position of the groundstation’s callsign and leave the position for the latter zeroed (000000) instead.
You may have noticed that one of the two CW beacon types is always 000000A800. It’s type 2 which has 3 of its 5 bytes for the gyros. However, CosmoGirl-Sat has no gyros, hence it starts by 000000.
The first 3 bytes of type 1 give information about the battery (mV, mA, °C). However there is no conversion formula published how to calculate the hex numbers into meaningful values (not only a Kosen-1 problem).
Since all three satellites are pretty similar, you may try to use SAKURA’s conversion formula.
I noticed, that while Sakura and Sagansat0 has telemetry for solar panels -x as well as for +y and -y, CosmoGirl-Sat’s telemetry table shows -x and +y as well as +x instead.
And I’m in contact with one of the team members who tries to get answers to the above mentioned things and if there will be also a GMSK beacon or not.
I’ve finished the decoder and the dashboard already on September 1st, but now waiting for the last answers.
You have a great idea Daniel. Analyzing the first 3 bits of my reception HERE I did the calculations according to the conversion table provided by the SAKURA team and the data really doesn’t seem absurd at all.
I will send a message to the email you provided and hope for a response. Throughout this evening here in Brazil I must try to better understand the rest of the data sent by CosmoGirl-Sat at my reception mentioned above
A47FB81420
B8 = 184 in decimal
(I think B8 is the battery temperature value as mentioned in the table you shared)