User's Manual

B GSOF Messages
140 SPSx50 Modular GPS Receiver User Guide
UTC
This message describes current time information. It contains the following data:
• GPS time, in milliseconds of GPS week
• GPS week number
• GPS to UTC time offset, in seconds
Batt/Mem
This message provides information relating to the receiver battery and memory. It
contains the following data:
• Remaining battery power
• Remaining memory
Attitude
This message provides attitude information relating to the vector between the moving
base antenna and the heading antenna. It contains the following data:
• Tilt or vertical angle, in radians, from the moving base antenna to the heading
antenna relative to a horizontal plane through the moving base antenna
• Heading or yaw, in radians, relative to True North
Table B.11 UTC (Type 16 record)
Field Item Type Value Meaning
0 Output record type Char 10h
1 Record length Char 09h Bytes in record
2-5 GPS millisecond of
week
Long msecs Time when packet is sent from the
receiver, in GPS milliseconds of week
6-7 GPS week number Short number Week number since start of GPS time
8-9 UTC offset Short seconds GPS-to-UTC time offset
10 Flags Char See
Table B.16
Flag bits indicating validity of Time
and UTC offsets
Table B.12 Batt/Mem (Type ??? record)
Field Item Type Value Meaning
0 Output record type Char 25h
1 Record length Char 0Ah Bytes in record
2-3 Battery capacity Unsigned
short
percentage Remaining battery capacity in
presentage
4-11 Remaining memory Double hours Estimated remaining data logging time
in hours