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Acutime 2000 Synchronization Kit User Guide A-43
A Trimble Standard Interface Protocol
0x42 Report Packet 42
Single-Precision Position Fix, XYZ ECEF Report
This packet provides current GPS position fix in XYZ ECEF
coordinates. If the I/O "position" option is set to "XYZ ECEF" and
the I/O "precision-of-position output" (Packet 35) is set to single-
precision, and the packet is masked for output by packet 8E-4D, then
the GPS receiver sends this packet each time a fix is computed. The
data format is shown below.
The time-of-fix is in GPS time or UTC as selected by the I/O "timing"
option. At start-up, this packet or packet 83 is also sent with a
negative time-of-fix to report the current known position. Packet 83
provides a double-precision version of this information.
Table A-32 Report Packet 42
Byte Item Type Units
0-3 X SINGLE meters
4-7 Y SINGLE meters
8-11 Z SINGLE meters
12-15 time-of-fix SINGLE seconds