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| |||
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Geoid Separation |
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| meters |
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Units |
| M | meters |
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Age of Diff. Corr. |
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| second | Null fields when DGPS is not |
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| used |
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| |
Diff. Ref. Station ID | 0000 |
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| |
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| |
Checksum | *18 |
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| |
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＜CR＞＜LF＞ |
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| End of message termination |
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| Table |
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Value | Description |
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|
0 | Fix not available or invalid |
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1 | GPS SPS Mode, fix valid |
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2 | Differential GPS, SPS Mode, fix valid |
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|
Not Supported GPS PPS Mode, fix valid | |
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6 | Dead Reckoning Mode, fix valid |
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2.1.2 GLL-Geographic Position –Latitude/Longitude
Table
Example: $GPGLL, 3723.2475, N, 12158.3416, W, 161229.487, A*2C
Table 2-4 GLL Data Format
Name | Example | Units | Description |
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|
|
|
Message ID | $GPGLL |
| GLL protocol header |
|
|
|
|
Latitude | 3723.2475 |
| ddmm.mmmm |
|
|
|
|
N/S Indicator | N |
| N=north or S=south |
|
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|
|
Longitude | 12158.3416 |
| Dddmm.mmmm |
|
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|
|
E/W Indicator | W |
| E=east or W=west |
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|
UTC Position | 161229.487 |
| hhmmss.ss |
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Status | A |
| A=data valid or V=data not valid |
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Mode | A |
| A=Autonomous, D=DGPS, E=DR |
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Checksum | *2C |
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＜CR＞＜LF＞ |
|
| End of message termination |
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13
