i put here, all i know about this 1U cubesat. if you want add other information, i’m really happy and appreciate this..
there is paper about this sat on ieee, but i dont have account so i cannot download. maybe somebody here can help
mimpi dari pinggir jalan = “Dreams from the roadside.”
i’m finish vetting mostly the obs of this sat. check here
the APRS rx signal (freq 145.8250 MHz, same as ISS), should be like obs #12188312 :
i can decode it using gr_satellites:
RIDU-SAT1-APRS-OK.yml.txt (285 Bytes)
name: RIDU-SAT1
alternative_names:
- YH1SUP
norad: 64531
data:
&tlm Telemetry:
telemetry: ax25
transmitters:
1k2 AFSK downlink:
frequency: 145.825e+6
modulation: AFSK
baudrate: 1200
af_carrier: 1720
framing: AX.25
deviation: 400
data:
- *tlm
or using soundmodem by UZ7HO ver 1.14 (AFSK AX.25 1200bd)
sample wav from obs 12188312:
RIDU-SAT1-APRS-OK-12188312.wav.zip (164.6 KB)
result:
gr_satellites RIDU-SAT1-APRS.yml --wavfile /tmp/aprs2.ogg
-> Packet from 1k2 AFSK downlink
Container:
header = Container:
addresses = ListContainer:
Container:
callsign = u'APX1S' (total 5)
ssid = Container:
ch = False
ssid = 0
extension = False
Container:
callsign = u'YH1SUP' (total 6)
ssid = Container:
ch = True
ssid = 1
extension = False
Container:
callsign = u'WIDE1' (total 5)
ssid = Container:
ch = False
ssid = 1
extension = True
control = 0x03
pid = 0xF0
info = b'>R05.1VT0.0C-1.3 This is RIDU-Sat 1 from Indonesia' (total 50)
decode by direwolf :
direwolf -c ridusat.conf -dp
ridusat.conf.txt (109 Bytes)
YH1SUP-1 audio level = 87(14/14) [NONE] ||||||___
[0.2] YH1SUP-1>APX1S,WIDE1-1:>R05.1VT0.0C-1.0 This is RIDU-Sat 1 from Indonesia
------
U frame UI: p/f=0, No layer 3 protocol implemented., length = 73
dest APX1S 0 c/r=0 res=3 last=0
source YH1SUP 1 c/r=1 res=3 last=0
digi 1 WIDE1 1 h=0 res=3 last=1
000: 82 a0 b0 62 a6 40 60 b2 90 62 a6 aa a0 e2 ae 92 ...b.@`..b......
010: 88 8a 62 40 63 03 f0 3e 52 30 35 2e 31 56 54 30 ..b@c..>R05.1VT0
020: 2e 30 43 2d 31 2e 30 20 54 68 69 73 20 69 73 20 .0C-1.0 This is
030: 52 49 44 55 2d 53 61 74 20 31 20 66 72 6f 6d 20 RIDU-Sat 1 from
040: 49 6e 64 6f 6e 65 73 69 61 Indonesia
------
Status Report, Open Source Xastir
R05.1VT0.0C-1.0 This is RIDU-Sat 1 from Indonesia
the GMSK rx signal, should like these:
but im not yet can decode these gmsk signal.
what we know
im trying using these but not work :
name: RIDU-SAT1
alternative_names:
- YH1SUP
norad: 64531
data:
&tlm Telemetry:
telemetry: ax25
transmitters:
1k2 GMSK downlink:
frequency: 145.92500e+6
modulation: FSK
baudrate: 1200
framing: AX.25 G3RUH
data:
- *tlm
if i have more information , i will update in these threads
73!
