Topcon GB-500, Руководство оператора

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NMEA Standards
Topcon GB-500 Operator’s Manual
D-6
GNS Message
This message outputs data on time, position, and positioning of
GPS+GLONASS (GNSS), and is described in Table D-4.
Table D-4. GNS Message Ouputs
Field Description
1 UTC time of position fix (first two digits designate hours, the next two
digits designate minutes, and the remaining digits designate seconds)
2 Latitude in selected datum (first two digits designate degrees and the
remaining digits designate minutes of arc)
3 Latitude hemisphere: N - northern, S - southern
4 Longitude in selected datum (first three digits designate degrees and
the remaining digits designate minutes of arc)
5 Longitude hemisphere: E - eastern, W - western
6 Mode indicator: variable length valid character field type with the first
two characters currently defined. The first character indicates the use
of GPS satellites, the second character indicates the use of GLONASS
satellites. The indicators are:
N: No fix. Satellite system not used in position fix, or fix not valid
A: Autonomous. Satellite system used in non-differential mode in
position fix
D: Differential. Satellite system used in differential mode in
position fix
P: PPS independent positioning
R: RTK Fix solution
F: RTK Float solution
E: Estimated position mode
M: Manual input mode
S: Simulator mode
7 Total number of satellites used for position computation
8 Horizontal dilution of precision (HDOP) [-]
9 Altitude above geoid in selected datum [meters]
10 Geoidal separation: the difference between the earth ellipsoid and
geoid defined by the reference datum [meters]
11 Age of differential data [seconds] (see the note below)
12 Checksum