NavCom Sapphire Rev.J - Manual (Page 200)

Sapphire Technical Reference Manual Rev. J
200
1.148 RTGQUICKSTART (ASCII)
SF-3050 Sapphire SF-3040
The StarFire

RTG navigation solution requires 30 minutes or more to converge to its highest
level of position accuracy. This convergence time can be significantly shortened by entering an
accurate starting position for the antenna. This is referred to as an RTG QuickStart. This
command is used to manually set the QuickStart position for RTG. Single frequency StarFire
mode is not supported.
Command:
[RTGQUICKSTART] Action, {Lat-deg, Lat-min, Lat-sec, Lon-deg, Lon-min, Lon-sec, Height,
Datum}
Parameter Definition
Action
Keyword defined in Table 80 that specifies QuickStart actions. The following arguments are
required only when “START” is specified as action.
Lat-deg Degree portion of latitude (integer) (-90 to 90, positive North; ITRF-05)
Lat-min Minute portion of latitude (integer) (0 to 59, assumed to be in same direction as Lat-deg)
Lat-sec Second portion of latitude (float) (0 to <60, assumed to be in same direction as Lat-deg)
Lon-deg Degree portion of longitude (integer) (-180 to 180, positive East; ITRF-05)
Lon-min Minute portion of longitude (integer) (0 to 59, assumed to be in same direction as Lon-deg)
Lon-sec Second portion of longitude (float) (0 to <60, assumed to be in same direction as Lon-deg)
Height Ellipsoidal height (float, meters;-1000 to no upper limit; without Solid Earth Tide compensation)
Datum
ITRF: The coordinates are displayed in the latest ITRF format unless otherwise specified.
Default: The coordinates are in the latest ITRF format.
WGS84: The coordinates given are in WGS84 format.

This parameter is only supported in v3.3.6 or later firmware.

Minus sign for South or West must precede only the Lat-deg and Lon-deg fields.
Table 80: [RTG QUICKSTART] Action Keywords
Keyword Mnemonic RTG QuickStart Action
START Initiates a QuickStart to the entered position
CANCEL Cancels a QuickStart that is in progress
RESET Cancels a QuickStart that is in progress and causes a full reset of RTG navigation