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Global Navigation Satellite System (gnss) Object
Tim Mathews edited this page Apr 1, 2014
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4 revisions
Like all other components of the UDM, consumers of the GNSS object should tolerate the addition of new fields and variance in ordering of fields with ease. Not all fields appear in all contexts. Generally, missing fields, nulled fields and empty sets are the same thing.
| Field | Type | Associated PGN(s) / Sentence(s) | Description |
|---|---|---|---|
| gnssType | GnssType | 129029:6 | An integer identifying the GNSS type used in this fix |
| method | Method | 129029:7 | An integer identifying the method used to calculate the fix |
| integrity | Integrity | 129029:8 | An integer identifying the integrity of the fix |
| fixMode | FixMode | 129540:1 | An integer identifying the mode used for the fix. We need reports of other values |
| satelliteCount | integer | 129029:10(8), 129540:3(8) | Number of satellites used in the fix. Also the size of the satellites collection |
| satellites | collection of Satellite | Collection of satellite information for each satellite used in the fix. There must be at least 3 for a valid fix, but may be more. (Up to 12?) | |
| dilutionOfPrecision | DOP | ||
| geoidalSeparation | meters | 129029:13(16) | |
| referenceStationCount | integer | 129029:14(8) | Number of reference stations used in the fix. Also the size of the referenceStations collection |
| referenceStations | collection of ReferenceStation |
| Field | Type | Associated PGN(s) / Sentence(s) | Description |
|---|---|---|---|
| prn | integer | 129540:4..+7(8) | Pseudorandom binary sequence code. Essentially the satellite ID. |
| elevation | degrees | 129540:5..+7(16) | |
| azimuth | degrees | 129540:6..+7(16) | |
| snr | dB | 129540:7..+7(16) | |
| rangeResiduals | integer | 129540:8..+7(32) | |
| status | SatelliteStatus | 129540:9..+7 |
| Field | Value | Assoc. PGN |
|---|---|---|
| desiredMode | DOP Mode | 129539:1 |
| actualMode | DOP Mode | 129539:2 |
| horizontal | float | 129029:11(16), 129539:4(16) |
| vertical | float | 129539:5(16) |
| probable | float | 129029:12(16) |
| time | float | 129539:6(16) |
| Field | Value | Assoc. PGN |
|---|---|---|
| stationType | GnssType | 129029:15..+3 |
| stationId | integer | 129029:16..+3 |
| correctionAge | seconds | 129029:17..+3(16) |
| Value | Name |
|---|---|
| 0 | GPS |
| 1 | GLONASS |
| 2 | GPS+GLONASS |
| 3 | GPS+SBAS/WAAS |
| 4 | GPS+SBAS/WAAS+GLONASS |
| 5 | Chayka |
| 6 | Integrated |
| 7 | Surveyed |
| 8 | Galileo |
| Value | Name |
|---|---|
| 0 | No GNSS |
| 1 | GNSS Fix |
| 2 | DGNSS Fix |
| 3 | Precise GNSS |
| 4 | RTK Fixed Integer |
| 5 | RTK Float |
| 6 | Estimated (DR) Mode |
| 7 | Manual Input |
| 8 | Simulate Mode |
| Value | Name |
|---|---|
| 0 | No Integrity Checking |
| 1 | Safe |
| 2 | Caution |
This is obviously an incomplete list
| Value | Name |
|---|---|
| 3 | Range residuals used to calculate position |
| Value | Name |
|---|---|
| 0 | Not Tracked |
| 1 | Tracked |
| 2 | Used |
| 3 | Not Tracked+Diff |
| 4 | Tracked+Diff |
| 5 | Used+Diff |
| Value | Name |
|---|---|
| 0 | 1D |
| 1 | 2D |
| 2 | 3D |
| 3 | Auto |
| 4 | Reserved |
| 5 | Reserved |
| 6 | Error |