REFERENCE MANUAL - FTP Directory Listing - Trimble

A
TRIMBLE STANDARD INTERFACE PROTOCOL (TSIP)
Command Packet 0x3A - Request Last Raw Measurement
This packet requests the most recent raw measurement data for one specified satellite.
The GPS receiver returns packet 0x5A if data is available.
.
Table A.23
Command Packet 0x3C Data Format
Byte Item Type Value Definition
0 Satellite # UINT8 0
1 - 32
All satellites in the current track
set.
Desired satellite.
Command Packet 0x3C - Request Current Satellite Tracking Status
This packet requests the current satellite tracking status. The GPS receiver returns
Packet 0x5C if data is available.
Table A.24
Command Packet 0x3C Data Format
Byte Item Type Value Definition
0 Satellite # UINT8 0
1 - 32
All satellites in the current track
set.
Desired satellite.
Report Packet 0x41 - GPS Time
This packet provides the current GPS time of week and the week number. The GPS
receiver sends this packet in response to Packet 0x21 and during an automatic packets
update cycle. The data format is shown below.
Table A.25
Report Packet 0x41 Data Formats
Byte Item Type Units
0-3 GPS time of week Single seconds
4-5 Extended GPS week number INT16 weeks
6-9 GPS UTC offset Single seconds
C
WARNING
Note – UTC time lags behind GPS time by an integer number of seconds; UTC =
(GPS time) - (GPS UTC offset).
– GPS week number runs from 0 to 1023 and then cycles back to week #0.
week # 0 began January 6, 1980. The first cycle back to week #0 was on August 22, 1999.
The extended GPS week number however, does not cycle back to 0. For example: the
week # for August 22, 1999 = 1024; the Week # for April 1, 2002 = 1160.
140 Copernicus GPS Receiver