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Techtime program Q&A
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Q1] Information about the beacon from TechSat-1b(GO-32) ?

A1] TechSat-1b(GO-32) was launched 06:30UTC, 7 Jul 1998.
    Beacon is send every 30 seconds with 435.225MHz 9600bps FSK.

    You must get 'KISS file' befor the fact from the satellite
    with WiSP32.   Firstly check the followings setup in 'GSC'.


         GSC - Setup - Satellite Setup - GO-32 - Edit - 
               - MSPE Settings - Log Kiss frames
                                 Log telemetry frames - OK
        (again)- MSPE Settings - Log Kiss frames
                                 Log telemetry frames - OK


    I received the following KISS data on 16-Sept-98.
    And I debuged this KISS file with 'debug.exe' as below.

    ...........................................................
    245B:0100  63 6D 64 3A 4B 49 53 53-20 20 20 20 20 77 61 73
    245B:0110  20 4F 46 46 0D 63 6D 64-3A C0 00 0A 0B 15 00 8C
    245B:0120  01 49 07 FF 35 54 65 63-68 53 61 74 2D 56 37 2E
    245B:0130  32 00 44 00 00 00 00 1E-23 10 00 40 10 05 00 00
    245B:0140  00 00 00 61 0E 02 00 C0-C0 00 0A 0B 15 00 8C 01
    245B:0150  67 07 FF 35 54 65 63 68-53 61 74 2D 56 37 2E 32
    245B:0160  00 44 00 00 00 00 1E 23-10 00 40 10 05 00 00 00
    245B:0170  00 00 50 0E 02 00 C0 C0-00 0A 0B 15 00 8C 01 85

               cmd:KISS     was
                OFF.cmd:.......
               .I..5TechSat-V7.
               2.D.....#..@....
               ...a............
               g..5TechSat-V7.2
               .D.....#..@.....
               ..P.............
    ...........................................................


    JJ1WTK / Kazu Sakamoto analyzed as follows:

    0A 0B 15             ......(1)
    00 8C 01             ......(2)
    49 07 FF 35                   ......(3)
    54 65 63 68 53 61 74 2D 56 37 ......(4)
    2E 32 00 44 00 00 00 00 1E 23 10 00
    40 10 05 00 00 00 00 00 61 0E 02 00 ......(5)


    (1) addresses(extended) '0A 0B' and control field '15'..?
    (2) no idea. seemed to be always fixed.
    (3) the 4 bytes(32bits) '49 07 FF 35' is UNIX timestamp.
        '35FF0749' in hex means 'Wed Sep 16 00:33:13 UTC 1998'
    (4) always readable in ASCII. Fixed. This 10 bytes mean
        'TechSat-V7'.
    (5) may be an infomation. Almost all bytes seem to be fixed
        but for one. The value of the second bottom byte ( '61'
        in above example) changes often.
        no idea what does the each byte in section(2) & (5)
        mean respectively.

    Here is another example. 
    On the next transmission(30 seconds later above),

    0A 0B 15
    00 8C 01
    67 07 FF 35 ......means 'Wed Sep 16 00:33:43 UTC 1998'
    54 65 63 68 53 61 74 2D 56 37 ........means 'TechSat-V7'
    2E 32 00 44 00 00 00 00 1E 23 10 00
    40 10 05 00 00 00 00 00 50 0E 02 00

    And on the next day(00z 17-Sept-98),

    0A 0B 15
    00 8C 01
    53 54 00 36 ......means 'Wed Sep 17 00:14:11 UTC 1998'
    54 65 63 68 53 61 74 2D 56 37 ........means 'TechSat-V7'
    2E 32 00 44 00 00 00 00 1E 23 10 00
    40 10 05 00 00 00 00 00 5E 0E 02 00


    The TechSat team has also constructed a home page about TechSat.
    http://techsat.internet-zahav.net/

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Q2] How is 'Techtime.exe' program used?

A2] This 'Techtime.exe' is a program to calculate the current
    time in the satellite TechSat-1b(GO-32). This progaram is
    wrote with Japanese language.

    In the data above, 35FF0749(hex) is 905905993(dec),
    so 10485 days and 33 minutes 13 seconds. That is to say,
    the time is passed 10485 days and 33 minutes 13 seconds
    since 1 Jan 1970.  Therefore this is 00:33:13 UTC, 16 Sep 1998.

    Likewise, 35FF0767(hex) is 905906023(dec), so this is 00:33:43 UTC,
    16 Sep 1998.

    'Techtime' program convert automatically into the current time
    from the hexadecimal data of eight figures.


    'TechTime' program which is wrote with Japanese language
    is available at the following URL.
    http://www.ne.jp/asahi/hamradio/je9pel/techtime.lzh

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