Trimble Outdoors SPSX51 - Manual (Page 142)

B GSOF Messages
140 SPSx51 Modular GPS Receivers User Guide
TIME
This message describes position time information. It contains the following data:
• GPS time, in milliseconds of GPS week
• GPS week number
• Number of satellites used
• Initialization counter
LLH
This message describes latitude, longitude, and height. It contains the following data:
• WGS-84 latitude and longitude, in radians
• WGS-84 height, in meters
Table B.3 Time (Type 1 record)
Field Item Type Value Meaning
0 Output record type Char 01h Position time output record
1 Record length Char 0Ah Bytes in record
2–5 GPS time (ms) Long msecs GPS time, in milliseconds of GPS week
6–7 GPS week number Short number GPS week count since January 1980
8 Number of SVs used Char 00h-0Ch Number of satellites used to determine the
position (0-12)
9 Position flags 1 Char See Table B.17 Reports first set of position attribute flag
values
10 Position flags 2 Char See Table B.18 Reports second set of position attribute flag
values
11 Initialized number Char 00h-FFh Increments with each initialization (modulo
256)
Table B.4 Latitude, longitude, height (Type 2 record)
Field Item Type Value Meaning
0 Output record type Char 02h Latitude, longitude, and height output record
1 Record length Char 18h Bytes in record
2–9 Latitude Double Radians Latitude from WGS-84 datum
10–17 Longitude Double Radians Longitude from WGS-84 datum
18–25 Height Double Meters Height from WGS-84 datum