Novatel OM-20000041 用户手册

Logs summary

MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1

149

CLMA/B

Receiver Clock Model

The CLMA and CLMB logs contain the current clock-model matrices of the GPSCard. These logs can be both
generated and received by a GPSCard.

NOTE:

Only advanced users should seek to alter the clock model parameters of a GPSCard.

Throughout the following, these symbols are used:

B =

range bias (m)

BR =

range bias rate (m/s)

SAB = Gauss-Markov process representing range bias error due to SA clock dither (m)

For further information, please refer to the documentation given for the clka/b log.

The standard clock model now used is as follows:

clock parameters array = [ B BR SAB]

covariance matrix =

CLMA

Structure:

$CLMA

status

reject

noise time

update

parameters

covariance

*xx

[CR][LF]

Field #

Field type

Data Description

Example

$CLMA

Log header

$CLMA

status

Status of clock model (0 = good;
-1 to -20 = bad)

reject

Number of rejected range bias
measurements (max. = 5)

noise time

GPS time of last estimate
(seconds)
- since Jan. 3, 1980 -

5.113140990E+010

update

GPS time of last update
(seconds)
- since Jan. 3, 1980 -

5.113140990E+010

6 - 8

parameters

Parameters array (1 x 3 = 3
elements)

5.810550069E+003, -1.07377180E+002, -1.41936974E+002

9 - 17

covariance

Covariance matrix (3x3 = 9
elements), listed left-to-right by
rows

9.744136534E+004, 1.676933050E+003, -8.98776739E+004,
1.676933050E+003, 4.750666170E+002, -7.06077622E+002,
-8.98776739E+004, -7.06077622E+002, 8.996728013E+004

*xx

Checksum

*00

[CR][LF]

Sentence terminator

[CR][LF]

SAB

B R

SAB