NavCom LAND-PAK Rev.N User Manual
Page 137
Technical Reference Manual Rev. N
Blk = All;
Blu = IOP w/Internal Radio
;
Red = IOP & LBM
;
Grn = Engine only
135
1. 0xB0 output On Change limited to 1Hz.
The 0XB1 msg will be output at same rate as nav rate when the Nav rate > 1Hz, and
0XB1 is scheduled On Change. However, 0xB0 does not follow the Nav rate and if
> 1Hz is desired, must be scheduled at the desired rate (i.e.; 5Hz).
2. Outputs On Trigger and by SV not supported.
3. 50Hz output available as an option.
4.
L1
= c/f
L1
= 299792458 M/s / 1575420000 Hz = 0.190293672798 meters
Example:
This is a properly formatted B0 message
Non-Repetitive section
ID
Length Week Time
Time
Slew N
Clock Stable
NAV Valid
B0
28
1410 391952000 0
1
0
1
Repetitive Section
PRN
P2L2
Valid
P1
Valid
CaL1
Valid
CA
L1 Slip P1
P2
L2
Slip
3
1
1
1
1907198094 35 4
-101 91
1048188 3
Checksum
CF
Type
Count
Wn5
P1 Pseudorange
P1 cycles = (CA + P1)/16
P1 Range = P1 cycles *
L1
S16
L1
Cycles
0 – 32767
-1 – (-32768)
LSB: 2
-4
2
Wn6
P2 Pseudorange
P2 cycles = (CA + P2)/16
P2 Range = P2 cycles *
L1
S16
L1
Cycles
0 – 32767
-1 – (-32768)
LSB: 2
-4
2
Wn7
L2 phase
B0-B3: Cycle Slip Counter
B4-B23: L2 Carrier Phase
L2 = (Ca + P2)*(120/154)/16 +
L2 Phase/256
S24
Bitmap
Bitmap
L2
Cycles
0 – 524287
-1 – (-524288)
LSB: 2
-8
3
CKSM Checksum
U08
1
ETX
03
(hex)
U08
1