NavCom StarUtil-3000 Rev.A - Manual (Page 45)

StarUtil-3000 User Guide – Rev A
Chapter 4 ....................................................................... Geoidal Databases
This chapter provides instructions to:
 Determine whether or not a geoidal database, GGM02 or a user-defined Geoid Height Map,
is loaded in the receiver
 Upload the GGM02 database or a user-defined Geoid Height Map (identified as GEOID99 in
StarUtil-3000)

In addition, this chapter provides the GEOIDAL99 format and file requirements.
User-defined Geoid Height Maps are based on the GEOIDAL99 format.

Refer to the Sapphire Technical Reference Manual for detailed information on the
commands used in this chapter: [GEOIDALMODEL] and [GGM02STATUS] (see
Related Documents in the fore-matter).
Determine If Geoid Model Is Loaded
No Geoid Model Is Loaded GGM02 Is Loaded GEOID99 Is Loaded
Figure 56: PVT Window – GEOID
Refer to Figure 56 for the steps below:

The GEOID status displayed on the PVT window has 3 possible values:
No Geoid Model, GGM02, or GEOID99 (user-defined geoidal database). Refer to
the section below,
Geoid Height Map , for information on the GEOIDAL99 format.
 View the PVT window on either the Dashboard or the PVT tab to determine if the GGM02 or
a GEOID99 database is loaded in the receiver. Click the Refresh button
to ensure that
the most current data is displayed in the window.
 If No Geoid Model is displayed, go to these sections to upload a geoidal database if desired:

Upload The GGM02 Database

Upload A User-Defined Geoid Height Map

If No Geoid Model is displayed, the Height and Altitude in the PVT window are the same.
If the GGM02 or GEOID99 database is loaded, the Height and Altitude typically differ.

The Input Terminal window can also be used to determine which geoidal model,
if any, is loaded in the receiver. Input [GEOIDALMODEL] to query the currently
selected geoidal database. In addition, the [GGM02STATUS] command may be
input to query the GGM02 database status in the receiver (see Figure 57).
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