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A-68 Lassen-SK8 Embedded GPS Module
Trimble Standard Interface Protocol
6-7 up velocity /
INTEGER
units 0.005 m/s or 0.020 m/s (see Byte 24). Overflow =
0x8000
Byte/
Item Type Meaning
8-11 Time Of Week /
UNSIGNED
LONG INTEGER
GPS Time in milliseconds
12-15 Latitude / LONG
INTEGER
WGS-84 latitude, units = 2
-31
semicircle.
Range = -2
30
to 2
30
.
16-19 Longitude /
UNSIGNED
LONG INTEGER
WGS-84 longitude east of meridian, units = 2
-31
semicircle. Range = 0 to 2
32
.
20-23 Altitude / LONG
INTEGER
Altitude above WGS-84 ellipsoid, mm.
24 Velocity Scaling When bit 0 is set to 1 velocities in bytes 2 through 7 have
been scaled by 4
25 Reserved
26 Datum Datum index + 1 0=unknown
27 Fix Type / BYTE Type of fix. This is a set of bit flags.
0 (LSB) 0: Fix was available
1: No fix available
1 0: Fix is autonomous
1: Fix was corrected with RTCM
2 0: 3D fix
1: 2D fix
3 0: 2D fix used last-calculated
altitude
1: 2D fix used entered altitude
4 0: unfiltered
1: position or altitude filter on
5-7 not used (always 0)
28 NumSVs / BYTE Number of satellites used for fix. Will be zero if no fix was
available.
29 UTC Offset /
BYTE
Number of leap seconds between UTC time and GPS
time.
30-31 Week /
INTEGER
GPS time of fix, weeks.
Table A-82. Report Packet 0x8F-20 Data formats (Continued)