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B     GSOF Messages

94     SPSx80 Smart GPS Antenna User Guide

This message describes the ECEF Delta position. It contains the following data:

Earth-Centered, Earth-Fixed X, Y, Z deltas between the rover and base position, 
in meters.

This message contains Tangent Plane Delta information. It contains the following 
data:

North, East, and Up deltas of the vector from the base to the rover (in meters) 
projected onto a plane tangent to the WGS-84 ellipsoid at the base receiver.

Table B.4

ECEF Delta (Type 6 record)

0

Output record type

Char

06h

Earth-Centered, Earth-Fixed (ECEF) Delta output record

1

Record length

Char

18h

Bytes in record

2–9

Delta X

Double Meters

ECEF X-axis delta between rover and base station 
positions

10–17

Delta Y

Double Meters

ECEF Y-axis delta between rover and base station 
positions

18–25

Delta Z

Double Meters

ECEF Z-axis delta between rover and base station 
positions

Table B.5

NEU Delta (Type 7 record)

0

Output record type

Char

07h

Tangent Plane Delta output record

1

Record length

Char

18h

Bytes in record

2–9

Delta east

Double meters

East component of vector from base station to rover, 
projected onto a plane tangent to the WGS-84 ellipsoid 
at the base station

10–17

Delta north

Double meters

North component of tangent plane vector

18–25

Delta up

Double meters

Difference between ellipsoidal height of tangent plane 
at base station and a parallel plane passing through 
rover point