Trimble Outdoors THUNDERBOLT 64057-00-ENG User Manual
Page 55
Trimble ThunderBolt E GPS Disciplined Clock User Guide
53
Trimble Standard Interface Protocol
A
Report Packet 0x57: Information about Last Computed Fix
This packet provides information concerning the time and origin of the previous
position fix. The receiver sends this packet, among others, in response to packet 0x37.
The data format for this packet is shown below.
Report Packet 0x58: GPS System Data from the Receiver
This packet provides GPS data (almanac, ephemeris, etc.). The GPS receiver sends this
packet in response to packet 0x38. The data format is shown below. The table and
section numbers referred to in the "Meaning" column reference the Global Positioning
System Standard Positioning Service Signal Specification document.
Report Packet 0x58 Data Format
Note – If data is not available, byte 3 is set to 0 and no data is sent
Byte
Item
Type
Value
Meaning
0
Source of info
UINT8
0
1
Old fix
New fix
1
Fix mode
UINT8
0
No previous fix
1
Time only 1-SV
2
2D clock hold (not used)
3
2D
4
3D
5
Over-Determined Clock
6
DGPS reference (not used)
2-5
Time of last fix
Single
Seconds GPS time
6-7
Week of last fix
UINT16
Weeks
Byte
Item
Type
Value
Meaning
0
operation
UINT8
2
Data out
3
no data on SV
1
Type of data
UINT8
2
Almanac
3
Health page, T_oa, WN_oa
4
Ionosphere
5
UTC
6
Ephemeris
2
Sat PRN #
UINT8
0
Data that is not satellite ID-specific
1 to 32
Satellite PRN number
3
Length (n)
UINT8
Byte count
4 to n+3
Data