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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