2015-06-17 08:04:11 +00:00
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DFM-06:
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Quellcode gibt es schon hier:
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2015-11-19 16:52:00 +00:00
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https://www.amateurfunk.uni-kl.de/projekte-aktivitaeten/decoder-wettersonden/
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2015-06-17 08:04:11 +00:00
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GPS Chip:
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Navman/Telit
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Modulation: FSK
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raw: 2500 bit/s.
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Manchester codiert -> 1250 baud
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Frame: 280 bit, davon 16 bit Header 0x45CF, dann
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3 Bloecke (CFG,DAT1,DAT2) mit (56,104,104) bits
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Interleaved: 7x8, 13x8, 13x8
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erweiterter systematischer [8,4]-Hamming-Code, erste 4 bit sind Daten
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Big Endian
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CFG-Block beginnt mit nibble
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0,1,2, 0,1,3, 0,1,4, 0,1,5, 0,1,6,
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0,1,2, ...
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DFM-06 (341110) Seriennummer xxxxxx:
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CFG-Block 6xxxxxx (Kanal 6)
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(fehlt bei aelteren DFMs)
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DAT-Block 48bit + 4bit-PCK_ID 0x0..0x8 (letztes nibble):
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PCK_ID bitpos
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0x0 24..31 Counter: 8 bit
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2015-07-20 09:23:44 +00:00
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0x1 32..47 UTC-msec : 16bit (sec*1e3), GPS = UTC + 17s (ab 1. Juli 2015)
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2015-06-17 08:04:11 +00:00
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0x2 0..31 GPS-lat : 32bit, Faktor 1e7
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2015-06-17 08:07:23 +00:00
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32..47 hor-V m/s: 16bit, Faktor 1e2
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2015-06-17 08:04:11 +00:00
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0x3 0..31 GPS-lon : 32bit, Faktor 1e7
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2015-07-06 07:37:36 +00:00
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32..47 direction: 16bit, Faktor 1e2 (unsigned, 0-36000)
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2015-06-17 08:04:11 +00:00
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0x4 0..31 GPS-alt m: 32bit, Faktor 1e2
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2015-07-06 07:37:36 +00:00
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32..47 ver-V m/s: 16bit, Faktor 1e2 (signed)
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2015-06-17 08:04:11 +00:00
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0x8 0..11 Jahr : 12bit
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12..15 Monat: 4bit
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16..20 Tag : 5bit
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21..25 Std : 5bit
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26..31 Min : 6bit
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0xF 0..47 000000000000
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2016-09-04 10:35:44 +00:00
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2016-09-04 11:22:13 +00:00
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DFM-09 (543410) Seriennummer xxxxxx:
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2016-09-04 10:35:44 +00:00
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CFG-Block Acaaaab (Kanal A)
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2016-09-04 11:23:45 +00:00
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b=0: high 16bit aaaa
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b=1: low 16bit aaaa
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2016-09-04 10:35:44 +00:00
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e.g.
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AC00070 : 0x0007
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ACDB131 : 0xDB13
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-> 0x0007DB13 = 514835
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2016-09-04 13:51:00 +00:00
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DFM-06 und DFM-09 haben unterschiedliche Polaritaet bzw. Manchester-Varianten
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DFM-06 hat Kanaele 0..6 (anfangs nur 0..5)
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DFM-09 hat Kanaele 0..A
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Ausnahme: erste DFM-09-Versionen senden wie DFM-06
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2016-09-04 10:35:44 +00:00
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