Changes between Version 23 and Version 24 of NDF
- Timestamp:
- Apr 18, 2018, 11:33:42 AM (6 years ago)
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NDF
v23 v24 33 33 34 34 ||=Data field=||=DF NUMBER=||=DATA TYPE=||=NO. OF BITS=||=NOTES=|| 35 || Satellite system || || uint5 || 4 || 0 == GPS, 1 == GLONASS, 2 == Galileo, 3 = SBAS, 4 = QZSS, 5 = BDS ||35 || Satellite system || || uint5 || 4 || 0 == GPS, 1 == GLONASS, 2 == Galileo, 3 = SBAS, 4 = QZSS, 5 = BDS, 6 = IRNSS || 36 36 || Satellite number || || uint6 || 6 || Satellite ID, index from MSM satellite mask bit field (0..63, see DF394) || 37 37 || Extended Sat Info || || uint4 || 4 || Specific for each GNSS system, Frequency number+7 for GLONASS || … … 55 55 || QZSS || DF428 || equals GPS || 56 56 || BDS || DF427 || similar to GPS, but with a 14 leap second difference || 57 || IRNSS || || equals GPS || 57 58 58 59 == Frame Data (implementation recommendation) == … … 81 82 * GLONASS: 82 83 * 85 bits 84 * IRNSS: 85 * 292 bits 83 86 84 87 Data senders need to decide whether data with bad checksum is transferred or not. While generally data with a bad checksum may be discarded, in disturbed environments even such data may be useful, in particular when parts of the message are common to multiple satellites, or when a portion of the data is already known.