NavCom StarUtil-3000 Rev.G - Manual (Page 149)

StarUtil 3000 User Guide – Rev G
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Figure 137: PVT Tab – Velocity
Error Estimates
Figure 138 : PVT Tab – Error Estimates
 Position FOM: The position Figure Of Merit is the estimated uncertainty in the navigation
solution. FOM is the same as the One sigma error estimate. Refer to the Sapphire Technical
Reference Manual (see Related Documents in the fore-matter).
 Time FOM: 10x TDOP
 DOP: Dilution of Precision. A class of measures of the magnitude of error in GPS position
fixes due to the orientation of the GPS satellites with respect to the GPS receiver. There are
several DOPs to measure different components of the error: GDOP (Position and Time),
PDOP (Dimensional Position), HDOP (Horizontal Position), VDOP (Vertical Position), and
TDOP (Time).
 Refer to Chapter 6 User Profiles/ [PDOPLIMIT] for additional information.
 NORTH/EAST/UP: The vectors for position velocity.