WinFrog User’s Guide - Appendix C – GPS/MX 9400
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must be entered, along with station usage and relative standard deviation values, as
detailed below:
Select DGPS Reference Stations:
Selection of individual stations is as follows:
ID
–
The Reference Station identification code. See SkyFix documentation for a
listing of all SkyFix reference station ID Codes. Coast Guard Beacon corrections
also contain unique codes for each station.
In the above example, SkyFix stations 535, 545 and 570 are used with assigned
relative standard deviations along with Coast Guard station 336. Coast Guard
Station 334 is monitored and is therefore not utilized in the position solution.
Off
–
Corrections from the selected
Reference Station will not be used in the
Multi-Ref position solution. This individual solution and will appear in red text in
WinFrog’s Calculations window and not update.
Use
– Reference Station is used in the Multi-Ref position solution, and will
appear in the Calculations window in black text. This individual solution will
appear in red text if no solution (refer to DGPS Mode) can be calculated from the
data.
Monitor
–
Reference Station is simply monitored by WinFrog, and is not used in
the Multi-Ref position. This solution will appear in yellow text in WinFrog’s
Calculations window.
Rel. Std. Dev
– This value defines the relative standard deviation of this solution
as compared to the other solutions used in the Multi-Ref position. Equal Rel. Std.
Dev. values indicate that all individual solutions will be equally weighted in the
Multi-Ref solution. Entering a higher Rel. Std. Dev value will de-weight an
individual solution compared to the others in the Multi-Ref solution.
CONFIGURE CALCULATIONS WINDOW
A Calculations window can be configured in WinFrog, allowing you to monitor the status
of the Mulit-Ref solution and make appropriate adjustments. To open the Calculations
window select
View > Calculations
from the main menu. In the Calculations window,
select the appropriate vehicle from the dropdown list and click the Setup button.
In the Setup Calculation View dialog box, select the
Position
and
Data Item Text
checkboxes. Next, highlight the
Pseudorange data item
, click the
On
button and exit
with OK. Refer to Chapter 14, GPS Calculations Displays section of the WinFrog User’s
Guide for more detailed descriptions of the various options and displays available with
the Calculations window.
