Trimble Inc. 6248192-B1 사용자 설명서

B     GSOF Messages

96     SPSx80 Smart GPS Antenna User Guide

Covariance east-north

Error Ellipse Semi-major axis, in meters

Error Ellipse Semi-minor axis, in meters

Orientation of Semi-major axis in degrees from True North

Unit variance

Number of epochs

This message provides brief satellite information. It contains the following data:

Number of satellites tracked

The PRN number of each satellite

Flags indicating satellite status

Table B.8

Sigma (Type 12 record)

0

Output record type

Char

0Ch

Position sigma information output record

1

Record length

Char

26h

Bytes in record

2–5

Position RMS

Float

Root means square of position error calculated 
for overdetermined positions 

6–9

Sigma east

Float

Meters

10–13

Sigma north

Float

Meters

14–17

Covar. east-north

Float

number

Covariance east-north (dimensionless)

18–21

Sigma up

Float

Meters

22–25

Semi-major axis

Float

Meters

Semi-major axis of error ellipse

26–29

Semi-minor axis

Float

Meters

Semi-minor axis of error ellipse

30–33

Orientation

Float

degrees

Orientation of semi-minor axis, clockwise from 
True North

34–37

Unit variance

Float

Valid only for over-determined solutions. Unit 
variance should approach 1.0 value. A value of 
less than 1.0 indicates that apriori variances are 
too pessimistic.

30–39

Number of epochs

short

count

Number of measurement epochs used to 
compute the position. Could be greater than 1 
for positions subjected to static constraint. 
Always 1 for kinematic.

Table B.9

SV brief (Type 13 record)

0

Output record type Char

0Dh

Brief satellite information output record

1

Record length

Char

Bytes in record

2

Number of SVs

Char

00h-18h

Number of satellites included in record

1