Perspective -- Navigation Processing Guide -- Software Version 7.6 By: Tony M. Ramirez November, 2013
Page 7 Use Precise Timing Architecture - used for data collected with an Applanix POSMV, requires POSRAW packets The same options for process
Page 8 2.4 When and How Much To Process... Below is a discussion on the different processing options for each data type. SIDESCAN: Amount: S
Page 9 BATHYMETRY (multibeam, singlebeam, & interferometric data): Amount: Bathymetry data generally requires very little processing of
Page 10 3.0 Processing Workflows 3.1 Process from File Tree (Sidescan, Bathymetry & Subbottom) Upon import of the raw survey data, the navi
Page 11 3.2 Process in Wizard (Sidescan & Bathymetry) After raw survey data files have been imported, sidescan data has a TVG curve and good
Page 12 4.0 Bad Navigation Example - Sidescan 4.1 Overview The following example illustrates the need for multiple passes of filtering for sides
Page 13 Based on the ping rate and the vessel speed we expect the beam spacing to be 0.2 meters, not 4.89 meters. By processing the navigation
Page 14 Creating a sidescan mosaic using the navigation after only one step of navigation filtering shows an obvious striping caused by the unev
Page 15 This was after only 2 steps of processing but additional steps may be needed for some data files. Having Beamlines displayed allows the
Page 16 5.0 Bad Navigation Example - Bathymetry 5.1 Overview The following example illustrates the need for multiple passes of filtering for a b
Page ii © 2013 TRITON This user guide is provided as a means to become familiar with TRITON’s software through an explanation
Page 17 5.2 First Run of Navigation Processing For processing this data I set the WINDOW = 12, NAV SOURCE = SHIP (mounted sonar), ITERATIONS = 1
Page 18 5.4 Compare Results This data example started with very erratic navigation beneath the bridges spanning the river. With repeat navigati
Page iii Table of Contents 1.0 Navigation Types ... 1 2.0 Processin
Page 1 Navigation Processing Processing navigation is an important step to obtaining clean results and some thought should go into what paramete
Page 2 2.0 Processing Options 2.1 File Tree Processing One way to process navigation data is from the Navigation file tree. Once data files hav
Page 3 The image right shows a good zoom level for monitoring the effects of navigation processing on the beamlines. Note in this image that b
Page 4 Reset - Overwrites processed navigation in cache with raw navigation data. Exit - Saves processing to cache file if not already done
Page 5 Bias - apply a single bias to the computed CMG heading Change Cutoff - cutoff value for CMG calculation (in degrees) Sensor - uses the
Page 6 2.2 Sidescan/Bathy Wizard Processing When creating sidescan mosaics or bathymetry grids in Perspective, the processing wizards allow user
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