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Lassen-SK8 Embedded GPS Module A-53
Trimble Standard Interface Protocol
*
Note – The sign convention provides for a carrier-phase decrease when the pseudorange
increases and the doppler is negative.
28–35,
55–62,...
Pseudorange DOUBLE meters Full L1 C/A
Pseudorange, filtered
36–43,
63–70,...
Carrier Phase DOUBLE cycles L1 band Continuous
Phase (truncated to
integer value)
44–47,
71–74,...
Doppler SINGLE hertz L1 band Doppler
End of the packet data
21+27n
22+27n
Checksum INTEGER — Sum of bytes before
checksum starting with
preamble
23+27n Postamble BYTE 3
Table A-58 FLAGS1 Bit Assignments
Bit Meaning
0 (LSB) Reserved (set to zero)
1 L1 Carrier-phase Cycle Slip
0: No
1: Yes
2 Reserved (set to zero)
3 Reserved (set to zero)
4 Valid L1 Carrier-phase:
0: No
1: Yes
5 Reserved (set to zero)
6 Reserved (set to zero)
7 (MSB) New Position Calculated:
0: No
1: Yes
Table A-57 Synchronized Measurements Report (Continued)
Byte # Item Type Value Meaning