User's Manual

B GSOF Messages
136 SPSx50 Modular GPS Receiver User Guide
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.
Velocity
This message provides velocity information. It contains the following data:
• Horizontal velocity, in meters per second
• Vertical velocity, in meters per second
Table B.4 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.5 NEU Delta (Type 7 record)
†
Field Item Type Value Meaning
0 Output record type Char 06h 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
†
These records are only output if a valid DGPS/RTK solution is computed.