25 May
2021
25 May
'21
7:29 p.m.
Hi,
1. I need some more info about S band GMR - what sat
is this , az / el ,
what trafic etc.
No clue. Hasn't been observed ... by me at least.
2. About gmr1 ambe decode - i tried about dozens of
.dat files from gmr1
rx live , some give me ! codec errors , some not , but all .wav audio
files are scrambled ,speesh is not recognized at all .. is there some
clear traffic at all, or all is A5/2 coded ?
On thuraya it's all encrypted AFAIK so you won't get anything if you
don't have the key.
3. If all is scrambled where i may find offline tables
/ H n matrix/,any
source that may generate them ? And if i have tables how they will be
integrated with existing osmo-gmr ? I see gmr1_gen_mat that generates
G/g matrix .. some more info about that .. .G and .g files seems so
small ..
The G / g matrix are small, nothing big to them.
And no, I don't have any plan for integration of any crypto break
inside the open-source osmo-gmr itself.
If you have commercial need for it, you can contact me privately.
Cheers,
Sylvain