Geodetic Datum; Raim - NSR Marine NGR-1000 User Manual

5.1.3 Geodetic Datum

Totally there are three systems to be selected: WGS84, PZ-90, CGCS2000.

5.1.4 RAIM

5.1.4.1 RAIM
RAIM (Receiver Autonomous Integrity Monitoring) can be set ON or OFF.
When set ON, RAIM will display SAFE, UNSAFE or CAUTION in below conditions:
 Conditions for the "safe" state
The result of integrity calculation by means of RAIM will be stated as "safe", if the
integrity calculation can be performed with a confidence level above 95 % for the
selected accuracy level and RAIM calculates the probable position error to be within the
selected accuracy level.
This generally requires at least 5 "healthy" satellites available and in a robust geometry,
i.e. the worst 4 satellite geometry is still suitable for navigation.
 Conditions for the "caution" state
The "caution" status will be used to indicate:
– insufficient information to reliably calculate with a confidence level above 95 % for
the selected accuracy level, or
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NGR-1000/NGR-3000 USER MANUAL
NGR-1000/NGR-3000 UM.E 20190331-04