NavCom Sapphire Rev.J - Manual (Page 130)

Sapphire Technical Reference Manual Rev. J
130
1.75 GGM02STATUS (ASCII)
SF-3050 Sapphire SF-3040
This command is used to query the GGM02 database status in the receiver. The GGM02
database is factory installed. The command does not require any argument. The receiver
responds with the keywords, VALID or INVALID.
 If the response to this command is INVALID, the GGM02 database is corrupted. Contact
NavCom Customer Support at
[email protected] for the procedure to
reload the database. Then use the command [GGM02STATUS] to verify that the upload is
successful.

Refer to section 1.91 LOADBULKB (Binary) for details on loading GGM02 data.

The GGM02 database is not part of the firmware because it is very large and would
significantly increase the loading speed of the firmware.

GGM02 stands for GRACE Gravity Model 02. It is derived from data recorded by
the Gravity Recovery And Climate Experiment (GRACE). This model is used to
compute geoidal separation, the difference between the WGS-84 earth ellipsoid
and mean-sea-level (geoid).
Command: [GGM02STATUS]
Examples: [GGM02STATUS]
[GGM02STATUS] VALID
GGM02 database in the receiver is valid
[GGM02STATUS]
[GGM02STATUS] INVALID
GGM02 database in the receiver is invalid