[amsat-bb] STARSHINE telemetry #2

[Mineo Wakita <ei7m-wkt@xxxxxxxxxxxxxxx>]

I received some telemetry frames from STARSHINE at 07-Oct, Sunday.

  Ante. : ZQ-81H  (LAMDA)         , 144MHz Cubical Quad 8 ele.
  Rig   : TS-790S (KENWOOD)       , 144/430MHz transceiver
  TNC   : TNC241, TMB965 (TASCO)  , G3RUH type modem
  Comp. : 486DX2/66MHz (VIP)      , DOS/V computer
  Soft. : Exterm.exe              , Program for communication

My equipment are as stated above.  TS-790S was modified for 9600.
TNC put time stamps on each packet. The property of this Quad is;

  Gain      F/B    Weight   Length
  17.2dBi   25dB   3.8kg    2.61m

STARSHINE was transmitting many clear signals every 123 seconds,
or every 2 minutes and 3 seconds as follows.


[145.825MHz 9600bps FSK]

[07-Oct-01  05:36:17z] <UI C>
STRSHN>AP0332:>de N7YTK.0900
29C30000299BA453823E027BFC5B
315F85406EBA7A1C94530281FC63
66D8401928873FEE9D4D025EFC45
381A7845A56C841F8309028CFC90
D2B682F30216646962240273FC12
6E192FCBA183662A00BF0281FC88

[07-Oct-01  05:38:20z] <UI C>
STRSHN>AP03AA:>de N7YTK.0900
29C0000029D6A4388306027BFC30
3895846D5F85798B94730289FCAB
66F64ECE335649BAA14E0273FC60
27BC8893A37D7A7783C2028CFCA0
D2AE81DB022064DF6B3F0273FC43
6E174226A51C652F00C20271FC65

[07-Oct-01  05:40:24z] <UI C>
STRSHN>AP0422:>de N7YTK.0900
299E000029D3A45E82930279FC68
534D83A986EC78B39490027BFC83
65CA7343524C6F70A4C40253FC63
354D61A69BD960B885C90281FC98
D27682A30218648484BA0283FC38
6E24316CA241667300BF026BFC73


I analized here only the bottom frame in the above three frames.

STRSHN>AP0422:>de N7YTK.0900
^^^^^^
  This is a ID of the sending station from "STARSHINE".

STRSHN>AP0422:>de N7YTK.0900
       ^^
  This is required to make STARSHINE packets APRS compatible,
  allowing them to be hosted by the APRS network.

STRSHN>AP0422:>de N7YTK.0900
         ^^^^
  The timestamp in hex is 0422, i.e.

  4 * 16^2 + 2 * 16^1 + 2 * 16^0 = 1058 seconds

  This packet was generated 1058 seconds, or 17 minutes and 38 seconds
  after STARSHINE deployment.

  332(hex) =  818(dec)
  3AA(hex) =  938(dec)
  422(hex) = 1058(dec)

  Therefore STARSHINE is transmitting exactly the beacon every
  120 seconds.

STRSHN>AP0422:>de N7YTK.0900
                        ^^^^
  "9" is the most significant character.
  "0" are currently undefined.


299E 0000 29D3 A45E 8293 0279 FC68  : Data from A/D Converter #1
534D 83A9 86EC 78B3 9490 027B FC83  : Data from A/D Converter #2
65CA 7343 524C 6F70 A4C4 0253 FC63  : Data from A/D Converter #3
354D 61A6 9BD9 60B8 85C9 0281 FC98  : Data from A/D Converter #4
D276 82A3 0218 6484 84BA 0283 FC38  : Data from A/D Converter #5
6E24 316C A241 6673 00BF 026B FC73  : Data from A/D Converter #6
---- ---- ---- ---- ---- ---- ----
 1    2    3    4    5   GAIN FULL
       Channel Number


References to the following URL for more details.

 http://www.epulation.com/starshine/starshine3/

----------------------------------------------
Name : JE9PEL/Mineo Wakita, JAMSAT member
Mail : ei7m-wkt@asahi-net.or.jp
URL  : http://www.ne.jp/asahi/hamradio/je9pel/
QTH  : Yokohama Japan, GL:PM95TJ
Date : Oct 8, 2001
----------------------------------------------


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