NavCom LAND-PAK Rev.N - Manual (Page 169)

Technical Reference Manual Rev. N
Blk = All; Blu = IOP w/Internal Radio ; Red = IOP & LBM ; Grn = Engine only
167
0xef - Clock Drift and Offset - 32 bytes
Record
Usage Command - No
Response - Yes Input: Not used;
Output: reports navigation status, clock drift and offset information
Ref Message Field Description
Data
Type
Units Range Scale
Byte
Count
STX 02 (hex) U08 1
PRA1 99 (hex) U08 1
PRA2 66 (hex) U08 1
ID ef (hex) U08 1
Length 0x0020 U16 2
W1 GPS Week – from 6 Jan 1980 U16 week 0 - 65535 2
W2 GPS milliseconds in week U32 sec 0 - 604799999 4
W3 Oscillator Temperature S08 degrees C -128 – 127 1
W4 Navigation Status (valid/invalid) U08 1
W5 Navigation Clock Offset R64 µsec 8
W6 Navigation Clock Drift R32 µsec 4
W7 Oscillator Filter drift estimate R32 µsec 4
W8 Accumulated time slew value S32 µsec
-2147483647 -
2147483646
Lsb:
1/1023
ms
4
CKSM Checksum U08 1
ETX 03 (hex) U08 1