Tag Archives: Telemetry

CUSAT and DANDE TLM 10-10-2013

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CUSAT Telemetry 10-10-2013 18:00 UTC (Max elevation 21 degree – Object B)
DANDE Telemetry 10-10-2013 18:04 UTC (Max elevation 22 degree – Object C)

Lets start with DANDE, Object C is still working great and I have good number of frames received and decoded. Download the kiss data at this location.

Looking at CUSAT, I listened to CUSAT for about 4 minutes and made a IQ recording so I could try some analysis after this pass. One thing that was better then before, and that’s the signal strength this evening. So started the AX25 AFSK sound modem and tried to decode some data. This wasn’t working, no data could be decoded by the sound modem from UZ7HO in combination with AWG Kiss Online. After the pass I toke the IQ file and did some further analyses. I tried both MiXW and UZ7HO but couldn’t decode anything. Maybe somebody can give it a try, the IQ file will be available at the following download location: CUSAT Data.

It seems as you can see in this image the signal is strong enough.

CUSAT SDR 10-10-2013 18:00UTC

But one thing that could be making it difficult, and that’s the tones, it seems that they aren’t 1200 and 2200 hertz but slightly of. And another thing that got my attention when playing back the IQ file, is the fact that seems to take an amount of time before the tones are locked at there final frequency.

CUSAT AX25 10-10-2013 18:00 UTC

DANDE Telemetry 09-10-2013

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DANDE Telemetry 09-10-2013 18:00 UTC
Max elevation 19 degree azimuth 148 – 027 degrees

This evening also used Object C 2013-055C and after correcting the frequency ones, it seems the downlink is 436.749 MHz. After that Doppler control toke over and it stayed spot on.

DANDE SDR 09-10-2013 18:00UTC

A total of 37 frames received and they are available at the download location.

DO-64 Telemetry 09-10-2013

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Delfi-C3 Telemetry 09-10-2013 08:39 – 08:50 UTC
Max elevation 18 degree, azimuth 028 – 157 degrees.

Because of a lot of carriers around the telemetry downlink frequency it is normally very difficult for me to decode the data from Delfi-C3. This morning it was going pretty well.
I have recorded the whole pass and as you can hear the satellite had some strange transmissions problems at the begin of the pass.

In total over 150 frames received and passed to the data collection server.

DO64 RASCAL 09-10-2013 08:39UTC

DO64 TLM 09-10-2013 08:39UTC

AENEAS Telemetry 08-10-2013

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AENEAS Telemetry 08-10-2013 19:10 UTC

AENEAS SDR 08-10-2013 19:10UTC

AX25 packet format:

1:Fm KE6YFA-1 To CQ Via TELEM  [21:11:16R]
4341455255531D00400200081D0B0117090037050000001000F075000070130049C062D941C74E

Decoder format:

AENEAS Beacon Data Decoder, Rev 1.1
Opening file at TLM_08-10-2013_1910UTC.txt
AENEAS Beacon TLM Packet found:
---------TELEMETRY-BEGIN----------
Total length: 29
Type:64
Unused: 0x02 0x00 
Time: 8/29/11-1-23:9:0
Reboots: 1335
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: 1273856
Telemetry Pointer: 7729152
Radio Status: 73
No detailed Radio info yet
Misc Write Pointer: 1104765632
---------TELEMETRY-END----------

DANDE Telemetry 08-10-2013

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DANDE Telemetry 08-10-2013 19:38 – 19:52 UTC
Max elevation 82 degree azimuth between 193 – 013 degrees.

Again using Object-C, this time 48 frames where captured. The data is on the download location.

DANDE Telemetry 08-10-2013 17:55 – 18:08 UTC
Max elevation 16 degree azimuth between 142 – 027 degrees.

Used Object-C 2013-055C TLE:

DANDE
1 39267U 13055C   13280.88171839  .00006188  00000-0  21045-3 0    45
2 39267  80.9931 307.0850 0796581 135.6654 231.1187 13.96656656  1151

DANDE SDR 08-10-2013 17:56UTC

I corrected the receive frequency to 436.7485 and after that Doppler correction did the rest. Seems that we are getting somewhere. But after this weekend I am careful.

Here is part of the data that I received, the rest can be found at the download location. In total I received 44 frames.

from DANDE-2 to DANDE-1: 
   1 > 64 61 6E 64 65 63 6F 73 67 63 00 0B F5 A3 00 07 00 00 00 00 
  21 > 00 00 00 00 05 F7 00 81 02 00 D0 02 00 01 02 00 00 FF 02 03 
  41 > 14 01 D0 00 00 01 4F 01 F0 01 C9 01 D5 01 CE 01 D2 01 D7 28 
  61 > 00 00 01 0F E3 00 06 0C 3B 0B DA 0E DD 06 3B 05 C7 05 D1 05 
  81 > F0 00 04 05 C6 09 3B 2B 5C 36 EB 0D 43 0E 44 00 00 64 61 6E 
 101 > 64 65 2E 63 6F 6C 6F 72 61 64 6F 2E 65 64 75 DA B2

All received data including two IQ files, can be found at the following location.

CSSWE Telemetry 08-10-2013

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CSSWE Telemetry 08-10-2013 18:45 UTC

CSSWE TLM 08-10-2013 184:5UTC

CSSWE Telemetry 08-10-2013 17:09 UTC

CSSWE Telemetry Decoder   (c) Mike Rupprecht, DK3WN
=====================================================

Satellite Mode         SAFE            |  Cmds Since Boot        17740             
Time Since Boot        111.9991  days  |  EPS                    OK                
Batt Voltage           7.88      V     |  Batt Temp              18      dec C   
Batt Discharge Current 62.75     mA    |  Batt Charge Current    0.00    mA      
5V Bus Voltage         5.00      V     |  5V Bus Current         31.37   mA      
3.3V Bus Voltage       3.31      V     |  3.3V Bus Current       54.90   mA      
Solar Panel Volt/Curr  OK              |  PVX1 Voltage           0.00    V       
PVX1 Current           0.00      mA    |  PVX2 Voltage           10.61   V       
PVX2 Current           0.00      mA    |  PVY1 Voltage           0.34    V       
PVY1 Current           0.00      mA    |  PVY2 Voltage           8.40    V       
PVY2 Current           0.00      mA    |  Solar Panel Temp       OK              
PVX1 Temp              -11       deg C |  PVX2 Temp              29      deg C   
PVY1 Temp              13        deg C |  PVY2 Temp              57      deg C   
Radio                  OK              |  Radio Temp             19      deg C   
CDH Temp               19        deg C |  GPIO: Battery Heater   OFF     V       
GPIO: ADM Resistor     OFF       V     |  GPIO: REPTile 3.3V     ON      A