07-05-2013 09:15 UTC
ESTCube-1 working in CW on 437.251500 MHz
With the use of following TLE:
ESTCube-1 1 99999U 99999 13127.17171296 .00000000 00000-0 10000-3 0 00005 2 99999 098.1390 205.7730 0134000 220.5400 211.2631 14.71982716000009
First Telemetry decoded by DK3WN:
09:12 UTC ES5E/S T WMTC5ET ZFHB6E ATTT DNTTTT TTFSFS 5A5NTT TTTZ TZTT KN
Congratulation for the ESTCube-1 team.
04-05-2013 17:48 UTC
Nice to see the Morse code in the spectrum, you can see the points and dashes.
RAW data:
BJ1SA XW XW AAA TTT AU4 T6E ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AU4 AEE TTT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AU4 AAE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AU4 TDE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AU4 4TB ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AU4 A4E TTT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AU4 EIT ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AA4 TNT ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AU4 A4T ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
Decoded data:
It was a joint effort of Radio Amateurs, PolySat and the CubeBUG team that finally resulted in the decoding of the faint AX25 signals that are transmitted by CubeBUG-1.
PolySat had recorded a audio file that could be decoded by DK3WN with the use of MixW. The settings used with MixW where standard VHF 1200 baud modem.
from CUBEB1 to CQ: 1 > FF FF F0 00 00 00 00 01 D0 F0 CD 03 00 00 34 08 00 00 00 9B 21 > 02 B9 01 BD 03 FF 02 D3 02 7E 03 FF 01 88 03 FF 03 3A 03 2A 41 > 03 FF 03 34 03 B6 00 00 00 03 00 00 00 00 10 02 35 FE E8 05 61 > D6 00 AF FD AD FF D3 01 29 from CUBEB1 to CQ: 1 > FF FF F0 00 00 00 00 01 D1 70 32 03 00 00 34 08 00 00 00 96 21 > 02 BD 03 FF 03 FF 02 C3 03 75 03 FF 01 7E 03 FF 02 F9 03 29 41 > 03 FF 03 34 03 E5 00 00 00 03 00 00 00 00 10 01 DF FE CA 05 61 > DA 00 72 FD 0D FF D3 01 37
3V3Bus_Isense (mA): 236.85 5VBus_iSense (mA): -271.012 Antenna deployment counter: 10 Antenna deployment enabled: False Array1+_Isense (mA): 348.88 Array1-Vsense (V): 8.96 Array1-_Isense (mA): 139.76 Array2+_Isense (mA): 453.71 Array2-_Isense (mA): 139.76 Array2_Vsense (V): 9.89 Array3+_Isense (mA): -27.10 Array3-_iSense (mA): 79.89 Array3_Vsense (V): 5.14 Battery 1 (C): 8 Battery_Vsense (V): 8.21 Current Mode: SURVIVAL FreeHeapSize: 13320 Gyroscope X: 175 Gyroscope Y: -595 Gyroscope Z: -45 IMU 3000 Temp: 2.97 Last Seen Seq: 3 Low Voltage Counter: 0 Magnetometer X: 565 Magnetometer Y: -280 Magnetometer Z: 1494 Next Beacon Enable (ticks): 0 NumOfOverflows: 0 Temp Radio (C): 9 TickCount: 30470349 realTickCount: 30470349
24-04-2013 14:31, 16:12 and 18:00 UTC
I know it is already a couple of days old but it was still parked on my desktop and now it was time to decode these telemetry data from Aeneas. The data is decoded with the jar file from USC University of Southern California.
RAW AX25 data:
16:31:25 KE6YFA-1/TELEM>CQ>UI,?,F0 (1199 baud): 4341455255531D00400200030F0B0214130007050000001000F07500007F1C0049401BF6416E6B 16:31:45 KE6YFA-1/TELEM>CQ>UI,?,F0 (1199 baud): 4341455255531D00400200030F0B0214131407050000001000F07500007F1C0049401BF641B893 16:32:05 KE6YFA-1/TELEM>CQ>UI,?,F0 (1199 baud): 4341455255531D00400200030F0B0214132807050000001000F07500007F1C0049401BF641D392
Decode the data with the following java program:
java -jar BeaconDecoder.jar input-file.txt
Then the output looks like this:
AENEAS Beacon Data Decoder, Rev 1.1 Opening file at Telemetry.txt AENEAS Beacon TLM Packet found: ---------TELEMETRY-BEGIN---------- Total length: 29 Type:64 Unused: 0x02 0x00 Time: 3/15/11-2-20:19:0 Reboots: 1287 Last Reboot Cause: 0 Flash Status: 0 Bit 0 = 0 : Device is ready. Bit 1 = 0 : Device is NOT write-enabled. Bit3&4= 1 : All sectors software-protected. Bit 4 = 0 : WP is asserted. Bit 5 = 0 : Last op successful. Bit 7 = 0 : Sector Protection Registers unlocked. Payload Write Pointer: 1867520 Telemetry Pointer: 7729152 Radio Status: 73 No detailed Radio info yet Misc Write Pointer: 1106647872 ---------TELEMETRY-END----------
27-04-2013 18:55 UTC
The first pass was 8 minute with max 5 degree elevation. Signals where stronger when using LHCP. Signal strength 10db above noise. Not possible to decode the AX25 1200 data. Frequency used: 437.438400 MHz FM
27-04-2013 20:29 UTC
The second pass was 12 minute with max 30 degree elevation. Signals where stronger then the one from 18:55 max 20db above noise. You can even see and hear some audio tones but unable to decode.
For those who want to experiment with my received data, you can download the IQ file that I recorded with SDR# on the following location: 27-04-2013 20:29 UTC 16bit PCM IQ file
26-04-2013 12:20 UTC
Lower in frequency then was communicated a carrier with very weak audio that sounded like AX25 1200 baud. But there are signals that seem to be transmitted from CubeBUG-1.
A job well done by the CubeBUG team, congratulations.
26-04-2013 20:08 UTC
Later that evening I listened for CubeBUG-1 and recorded an IQ file. This file can be downloaded at the following location: download. This file is recorded with SDRSharp in 16bit PCM baseband format.