Triton BathyPro - Manual (Page 57)

Selecting Raw Data Processings Parameters
Raw data processing parameters are used with many BathyPro sessions. These
parameters appear at the top of the list of available parameters in the Select
processings dialog box (Figure 24). They are:
• Navigation processing
• Attitude processing
• Bathymetry processing
Figure 24 shows the kind of Select processings dialog box you get for an XTF file
containing multibeam data
when you choose Bathy Processing → Select
Processings…
For all parameters in the Select processings dialog box except Use RTK value,
there are corresponding Settings… buttons which, when clicked, reveal value
choices that you can select for their parent parameters.
Navigation Processing
Clicking the Settings button to this parameter leads to the Navigation
Processings Settings dialog box (Figure 26). In the Navigation Processings
Settings dialog box, you will need to know how the data were written to the
XTF file by Isis.
Always process the navigation from an XTF file — the
navigation information in an XTF file is raw data and
must be processed before a valid DTM can be
generated!
Navigation processing must be enabled every time an XTF file is processed,
since the XTF file is not modified in any way during the processing. The
settings for the XY position, heading and Speed are stored in the
BathyPro.ini file, and will be reloaded each time the program runs. If the
Reset to Factory is selected, or the *.ini file is deleted, these values will go
back to the default values.
After selecting the source of the navigation — either ship or sensor,
depending on how the data were stored in the XTF file, an appropriate
smoothing factor is selected. The smoothing method works in the following
manner: Assuming the default of 0 is selected, a series of three navigation
points is taken, and the center point is shifted to a new position. The new
position is the center of gravity of the triangle formed by Points 1, 2, and 3.
June 2004 BathyPro User’s Manual
57