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Computation type: Check Cross Section
This computation type calculates residuals of two repeated measurements of distances between a central point of the X-section and any other point of the X-section. MAGNET Field calculates the distance measurements residuals in the horizontal and vertical planes.
MAGNET Field can perform comparison for:
- two sessions from the current job;
- two sessions from the other job(s);
- one session from the current job and one session from the other job.
There are the following requirements for the RTK measurements:
- The same base station should be used to perform measurements;
- The repeated road points measured should be stored in different sessions;
- Each session should contain at least two measured points;
- The X-section central point name should contain 16 characters (e.g. 123456789112345_);
- The X-Section point name (except for the central point) must contain the central point name and 4 extra characters (e.g. 123456789112345_R001).
MAGNET Field calculates residuals for two selected sessions.
The application calculates the length residuals of two repeated lines in the geocentric coordinate system (X,Y,Z) and converts these values to a coordinate system that is based on the stereographic projection (N,E) with origin point in the location of the base station. More...
The calculation uses the following formulas:
dHD = HD1 - HD2;
dHt = Ht1-Ht2.
where:
- HD1 - horizontal distance between a center point of X-section and a point of X-section which measurements were saved in the first session;
- HD2 - horizontal distance between a center point of X-section and a point of X-section which measurements were saved in the second session;
- Ht1 - vertical distance between a center point of X-section and a point of X-section which measurements were saved in the first session;
- Ht2 - vertical distance between a center point of X-section and a point of X-section which measurements were saved in the second session.
To calculate the residuals, do the following steps:
- Select the
check box for two sessions, which contain the measurements from the base station.
- Click the Next button to set tolerance values in the horizontal (dHD) and vertical (dHt) planes.
- Click the Calc button to start residuals calculation. The Results tab displays the residuals values.
If the calculated differences in the horizontal and verticals planes are less than the threshold values, the test is passed and the
icon is displayed.
If the calculated differences for any planes are more than the threshold values, the test is not passed and the
icon is displayed.
Click the
button to save the calculation results to *.txt or GNSS-Pro(*.DLF) file format.
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