Category Archives: DANDE

DANDE (Drag and Atmospheric Neutral Density Explorer)

DANDE Telemetry 16-12-2013

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DANDE Telemetry 16-12-2013 20:30 UTC

Tonight after a long period I received DANDE and decoded more then 60 frames transmitted by this satellite.

[136 Bytes KISS Frame (without CRC)]
   1 > C0 00 88 82 9C 88 8A 40 62 88 82 9C 88 8A 40 65 03 3A 64 61 
  21 > 6E 64 65 63 6F 73 67 63 00 67 13 39 00 11 00 66 F1 E6 00 66 
  41 > D9 DE 05 F7 00 00 00 06 D0 02 01 01 02 00 00 FF 02 01 6F 01 
  61 > 08 00 00 00 ED 00 B8 00 F7 01 10 01 09 01 02 01 03 28 00 00 
  81 > 01 0F EC 00 25 0C 8A 0B EA 0E DA 05 D7 05 95 05 9C 05 F1 00 
 101 > 01 05 C8 09 2E 3B EE 3C 0A 0D 40 0E 43 00 00 64 61 6E 64 65 
 121 > 2E 63 6F 6C 6F 72 61 64 6F 2E 65 64 75 44 CB C0 
À.ˆ‚œˆŠ@bˆ‚œˆŠ@e.:dandecosgc.g.9...fñæ.fÙÞ.÷....Ð......ÿ..o.....í.
¸.÷........(....ì.%.Š.ê.Ú.×.•.œ.ñ...È..;î<..@.C..dande.colorado.eduDËÀ

DANDE TLM 16-12-2013 20:30 UTC

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.

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.

DANDE Telemetry 04-10-2013

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DANDE Telemetry 04-10-2013 19:28 – 19:35 UTC using object 2013-055U

Sorry for all the possible confusion. I have to go back to the drawing board because what seemed to be a good fit last night, isn’t working anymore. It is still not clear what TLE to be used with CUSat and DANDE.

2013-055U
1 39273U 13055U   13277.46126644  .06799826  16859-1  11664+0 0   109
2 39273  80.9080 310.2662 0517474 146.5534 210.4066 14.72121854   685

In total 37 frames decoded and object U fitted perfect at the end of the pass.
Below, one of the frames received.

from DANDE-2 to DANDE-1: 
   1 > 64 61 6E 64 65 63 6F 73 67 63 00 06 C1 60 00 04 00 06 7F C1 
  21 > 00 00 00 00 05 F7 04 F7 02 00 D0 02 00 01 02 00 00 FF 02 02 
  41 > 3B 01 90 00 00 02 36 01 08 01 7E 01 8F 01 8B 01 A9 01 9F 28 
  61 > 00 00 01 0F E7 00 19 0D 50 0B DB 0E DD 06 89 05 FC 05 F7 05 
  81 > ED 00 02 05 C7 09 B2 3D 0B 3D 28 0E 1C 0F 25 00 00 64 61 6E 
 101 > 64 65 2E 63 6F 6C 6F 72 61 64 6F 2E 65 64 75 4A 44 
dandecosgc..Á`....Á.....÷.÷..Ð......ÿ..;....6...~..‹.©.Ÿ(....ç...P.Û.\
Ý.‰.ü.÷.í...Ç.²=.=(...%..dande.colorado.eduJD

I do have a lot of frames decoded from the late passes from 04-10-2013 and they can be found at the following location.

DANDE Telemetry download: location

DANDE Heard 02-10-2013 17:32 UTC

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DANDE heard during the pass of 02-10-2013 at 17:32 UTC. In total 10 frames received.

[136 Bytes KISS Frame (without CRC)]
from DANDE-2 to DANDE-1: 
   1 > 64 61 6E 64 65 63 6F 73 67 63 00 04 05 7C 00 03 00 00 00 00 
  21 > 00 00 00 00 05 F7 00 04 00 00 D0 02 00 01 02 00 00 FF 02 01 
  41 > B9 01 50 00 00 01 AC 00 B0 01 42 01 4F 01 48 01 63 01 56 28 
  61 > 00 00 01 0F EE 00 22 0C CC 0B EA 0E DE 05 D8 05 99 05 9B 05 
  81 > F0 00 01 05 C8 09 42 3B 58 3B 52 0D 8A 0E 8D 00 00 64 61 6E 
 101 > 64 65 2E 63 6F 6C 6F 72 61 64 6F 2E 65 64 75 D6 3C 
dandecosgc...|...........÷....Ð......ÿ..¹.P...¬.°.B.O.H.c.\
V(....î.".Ì.ê.Þ.Ø.™.›.ð...È.B;X;R.Š...dande.colorado.eduÖ<

DANDE received data Download: location