Observation 14489437: SUCHAI-4 (98265)

Satellites & Observations Observations
1

Regarding Observation 14489437 we can confirm it is SUCHAI-4

Decoded message:

QSocketNotifier: Can only be used with threads started with QThread
***** VERBOSE PDU DEBUG PRINT ******
((transmitter . 4k8 FSK downlink))
pdu length = 212 bytes
pdu vector contents =
0000: 83 e5 24 01 00 00 69 01 00 00 00 01 00 00 00 00
0010: 6a 2b b8 65 6a 2b b8 65 00 00 00 04 00 00 00 6c
0020: 00 00 00 0b 00 00 00 09 00 01 26 7d 00 00 32 e0
0030: 00 00 00 00 00 00 00 00 6a 25 ac d5 00 00 00 00
0040: 00 00 00 00 00 00 00 00 1a 0f e7 d0 00 00 00 03
0050: 00 00 12 c0 00 00 00 78 00 00 20 6c 00 00 00 51
0060: 00 00 00 5c 41 58 cc cd 00 00 00 50 00 00 00 02
0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0080: 00 00 00 03 ff ff ff ff 00 00 1a 2c 00 03 f4 80
0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00c0: 00 00 00 00 00 00 00 00 00 00 00 00 75 97 d6 dd
00d0: 03 34 e6 c7

→ Packet from 4k8 FSK downlink
Container:
csp_header = Container:
priority = 2
source = 1
destination = 30
destination_port = 20
source_port = 36
reserved = 0
fragmentation = False
hmac = False
xtea = False
rdp = False
crc = True
com_frame = Container:
n_frame = 0
type = 105
node = 1
ndata = 1
payload_id = 105
payload = Container:
index = 0
timestamp = 2026-06-12 07:42:29
dat_rtc_date_time = 2026-06-12 07:42:29
dat_obc_last_reset = 4
dat_obc_hrs_alive = 108
dat_obc_hrs_wo_reset = 11
dat_obc_reset_counter = 9
dat_obc_executed_cmds = 75389
dat_obc_failed_cmds = 13024
dat_com_count_tm = 0
dat_com_count_tc = 0
dat_com_last_tc = 1780853973
dat_fpl_last = 0
dat_fpl_queue = 0
dat_fpl_table = 0
dat_com_freq = 437250000
dat_com_tx_pwr = 3
dat_com_baud = 4800
dat_com_bcn_period = 120
dat_eps_vbatt = 8300
dat_eps_cur_sun = 81
dat_eps_cur_sys = 92
dat_obc_temp_1 = 13.550000190734863
dat_eps_temp_bat0 = 80
dat_sam_mach_action = 2
dat_sam_mach_state = 0
dat_sam_mach_left = 0
dat_sam_mach_step = 0
dat_sam_mach_payloads = 0
dat_mm_mode = 3
dat_mm_sciencemode = -1
dat_mm_vbatt_limit = 6700
dat_mm_last_tc_limit = 259200
dat_spl_table_0 = 0
dat_spl_current_0 = 0
dat_spl_exec_0 = 0
dat_spl_recovery = 0
dat_ads_tle_epoch = 0
dat_ads_tle_last = 0

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2

decode on gr_satellites:

name: SUCHAI-4
norad: 98265
data:
  &tlm Telemetry:
    telemetry: csp
transmitters:
  9k6 FSK downlink:
    frequency: 437.230e+6
    modulation: FSK
    baudrate: 9600
    framing: AX100 ASM+Golay
    data:
    - *tlm
  4k8 FSK downlink:
    frequency: 437.230e+6
    modulation: FSK
    baudrate: 4800
    deviation: 1600
    framing: AX100 ASM+Golay
    data:
    - *tlm
  1k2 FSK downlink:
    frequency: 437.230e+6
    modulation: FSK
    baudrate: 1200
    framing: AX100 ASM+Golay
    data:
    - *tlm

***** VERBOSE PDU DEBUG PRINT ******
((transmitter . 4k8 FSK downlink))
pdu length =        212 bytes
pdu vector contents = 
0000: 83 e5 24 01 00 00 69 01 00 00 00 01 00 00 00 00 
0010: 6a 2b b8 65 6a 2b b8 65 00 00 00 04 00 00 00 6c 
0020: 00 00 00 0b 00 00 00 09 00 01 26 7d 00 00 32 e0 
0030: 00 00 00 00 00 00 00 00 6a 25 ac d5 00 00 00 00 
0040: 00 00 00 00 00 00 00 00 1a 0f e7 d0 00 00 00 03 
0050: 00 00 12 c0 00 00 00 78 00 00 20 6c 00 00 00 51 
0060: 00 00 00 5c 41 58 cc cd 00 00 00 50 00 00 00 02 
0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
0080: 00 00 00 03 ff ff ff ff 00 00 1a 2c 00 03 f4 80 
0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00c0: 00 00 00 00 00 00 00 00 00 00 00 00 75 97 d6 dd 
00d0: 03 34 e6 c7 
************************************

-> Packet from 4k8 FSK downlink
Container: 
    header = Container: 
        priority = 2
        source = 1
        destination = 30
        destination_port = 20
        source_port = 36
        reserved = 0
        fragmentation = False
        hmac = False
        xtea = False
        rdp = False
        crc = True
    payload = b'\x00\x00i\x01\x00\x00\x00\x01\x00\x00\x00\x00j+\xb8ej+\xb8e\x00\x00\x00\x04\x00\x00\x00l\x00\x00\x00\x0b\x00\x00\x00\t\x00\x01&}\x00\x002\xe0\x00\x00\x00\x00\x00\x00\x00\x00j%\xac\xd5\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x1a\x0f\xe7\xd0\x00\x00\x00\x03\x00\x00\x12\xc0\x00\x00\x00x\x00\x00 l\x00\x00\x00Q\x00\x00\x00\\AX\xcc\xcd\x00\x00\x00P\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\xff\xff\xff\xff\x00\x00\x1a,\x00\x03\xf4\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00u\x97\xd6\xdd\x034\xe6\xc7' (total 208)

btw your payload decode more details. using gnu radio flowgraph script?

3

Thanks for the details. Yes we are using GNU Radio. But the satnogs decoder is in this merge request: Add SUCHAI-4 (!529) · Merge requests · librespacefoundation / SatNOGS / satnogs-decoders · GitLab

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