WinFrog User’s Guide - Appendix C – GPS/MX 9400
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Position:
A valid initial position should be entered. This provides an initial estimate of receiver
position for Rover operations, and reference station coordinates if the MX9400 is
used as a DGPS reference station. You must select the Update Box for the entered
value to be used.
Antenna Height:
Set the MX9400’s Antenna height calculation mode by selecting the appropriate
radio button. Select one of the 4 different modes of height calculation, as desired:
Calculated
–
This selection forces the MX9400 to use pseudo-range calculations
to compute the GPS antenna’s Height. In this mode, the MX9400 requires a
minimum of four satellites in order to calculate a valid 3-dimension position.
Fixed
– This mode selection fixes the MX9400’s height to the ellipsoidal height
value entered in the
Ellipsoid Height
box. In this mode, the MX9400 is able to
calculate valid positions using a minimum of three satellites.
Auto\Last Height
– The MX9400 will calculate a valid 3D position if four or more
satellites are available. If only three satellites are available, the height is fixed to
that of the last valid calculated height. In this mode, the MX9400 is able to
calculate valid positions using a minimum of three satellites.
Auto\Input Height
– The MX9400 will calculate a valid 3D position if four or
more satellites are available. If only three satellites are available, the height is
fixed to the value entered in the
Ellipsoid Height
box. In this mode, WinFrog is
able to calculate valid positions using a minimum of three satellites.