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SPSx80 Smart GPS Antenna User Guide     

GSOF Messages     

This message provides velocity information. It contains the following data:

Horizontal velocity, in meters per second

Vertical velocity, in meters per second

Heading, in radians, referenced to WGS-84 True North

This message describes the PDOP information. It contains the following data:

PDOP

HDOP

VDOP

TDOP

This message describes the Position Sigma information. It contains the following data:

Position RMS

Sigma east, in meters

Sigma north, in meters

Sigma up, in meters

Table B.6

Velocity (Type 8 record)

0

Output record type Char

08h

Velocity data output record

1

Record length

Char

0Dh

Bytes in record

2

Velocity flags

Char

See Table B.17

Velocity status flags

3–6

Speed

Float

Meters per second

Horizontal speed

7–10

Heading

Float

Radians

True north heading in the WGS-84 datum

11–14

Vertical velocity

Float

Meters per second

Vertical velocity

Table B.7

PDOP (Type 9 record)

0

Output record type Char

09h

PDOP information output record

1

Record length

Char

10h

Bytes in record

2–5

PDOP

Float

Positional Dilution of Precision

6–9

HDOP

Float

Horizontal Dilution of Precision

10–13

VDOP

Float

Vertical Dilution of Precision

14–17

TDOP

Float

Time Dilution of Precision