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Fixbaseline (ascii), Reserved – NavCom Sapphire Rev.J User Manual

Page 109

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Sapphire Technical Reference Manual Rev. J

109

1.54 FIXBASELINE (ASCII)

SF-3050

Sapphire

SF-3040

This command is used to enter baseline information for the MBRTK rover.

Command:

[FIXBASELINE] on_off {, length, length_rms}

Parameter

Definition

ON

When set to ON, the baseline between base and rover is assumed to be fixed. When ON,
the baseline length and its rms can be entered (i.e., both antennae on the same platform
for heading applications).

OFF

When set to OFF, the baseline is not fixed (i.e., leader follower application).

length

Baseline length in meters, between 1 and 250

length_rms

Baseline length tolerance, rms in meters, between 0.001 and 0.2

Default: OFF

Use the equation 0.6/L (whre L is length in meters) degree as a rough 1-sigma estimate of
heading accuracy. The minimum antenna separation is 1m. For heading applications, no
maximum is given. MBRTK operation is possible up to a 40km baseline length with the same
degredation in positioning performance accuracy as normal RTK over the same baseline length.

Examples: [FIXBASELINE] ON, 2.2, 0.02

Turns on baseline mode and sets baseline length tolerance to 2.2 meter with 0.02
meter rms.

[FIXBASELINE] OFF
Turns on baseline mode

[FIXBASELINE]
Displays status

1.55 Reserved