NavCom LAND-PAK Rev.N - Manual (Page 144)

Technical Reference Manual Rev. N
Blk = All; Blu = IOP w/Internal Radio ; Red = IOP & LBM ; Grn = Engine only 142
0xb5 - Pseudorange Noise Statistics - 66 bytes
The block can be scheduled using message 0x21 at On Change or at selected data rates.
Record
Usage Command - No
Response - Yes Input: Not used;
Output: reports computed Position, Velocity, and Time 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 b5 (hex) U08 1
Length 0x0042 U16 2
W1 GPS Week – from 6 Jan 1980 U16 week no. 0 - 65535 2
W2 Milliseconds in Week U32 msec 0 - 604799999 4
W3
RMS of the standard deviation of
the range of inputs to the
Navigation Process R64 meters 8
W4
Standard Deviation of semi-major
axis of the error ellipse
R64 meters 8
W5
Standard Deviation of semi-minor
axis of the error ellipse
R64 meters 8
W6
Orientation of semi-major axis of
the error ellipse
R64 degrees 0-359
from
true
north
8
W7
Standard deviation of Latitude
error
R64 meters 8
W8
Standard deviation of Longitude
error
R64 meters 8
W9 Standard deviation of Altitude error R64 meters 8
CKSM Checksum U08 1
ETX 03 (hex) U08 1
Zero value is invalid for standard deviation of altitude error in 0xB5 and NMEA GST.
The NCT-2000D/NCT-2100D does not contain RAIM support, so this block should be
considered our best estimate with no liability implied.