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SPSx51 Modular GPS Receivers User Guide     
141
GSOF Messages     
B
ECEF
This message describes the ECEF position. It contains the following data:
Earth-Centered, Earth-Fixed X, Y, Z coordinates, in meters
ECEF DELTA
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.
NEU DELTA
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.
Note – 
These records are only output if a valid DGPS/RTK solution is computed.
Table B.5
ECEF position (Type 3 record)
Field
Item
Type
Value
Meaning
0
Output record type
Char
03h
Earth-Centered, Earth-Fixed (ECEF) position output 
record
1
Record length
Char
18h
Bytes in record
2–9
X
Double Meters
WGS-84 ECEF X-axis coordinate
10–17
Y
Double Meters
WGS-84 ECEF Y-axis coordinate
18–25
Z
Double Meters
WGS-84 ECEF Z-axis coordinate
Table B.6
ECEF Delta (Type 6 record)
Field
Item
Type
Value
Meaning
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.7
NEU Delta (Type 7 record)
Field
Item
Type
Value
Meaning
0
Output record type
Char
07h
Tangent Plane Delta output record
1
Record length
Char
18h
Bytes in record