 |
| |
|
| NaviScan - Data Acquisition SoftwareDownload PDF |
|
|
| Applications |
|
|
The NaviScan software designed for vessel and ROV/AUV based marine surveys provides real-time collection and display of data from multibeam echosounders, side scan sonars, scanning and profiling sonars, pipe-trackers etc.
Device I/O Drivers
NaviScan comprises device I/O drivers for interface of multibeam echosounders, multibeam side scan backscatter imagery, pipe trackers, side scan sonars, scanning and profiling sonar’s etc. Data are interfaced through TCP/IP or any Windows NT/2000/XP supported I/O board. NaviScan allows interfacing of multiple or redundant secondary sensors, which during data editing allows for operator selected substitution of sensor data in case of noise or drop-outs in one or more sensor data. If NaviScan is used with NaviPac integrated navigation and data acquisition software start-of-line, stop-of-line and file naming are controlled automatically on signal from NaviPac.
|
|
|
|
|
|
|
|
|
|
|
Data Acquisition and Processing |
|
|
NaviScan performs data collection, time tagging, logging, data processing and display of data in real-time environment. The data is processed for motion, refraction and tides on-the-fly prior to displaying the data on monitor. Dedicated post-processing of data can be performed using the NaviEdit software. Modelling and charting of the edited survey data can be performed by use of NaviModel and NaviPlot, respectively.
Display
NaviScan provides full graphical sensor displays in scaleable windows comprising a/o raw data from Gyro, RPH sensor, Bathy, Doppler Log, and Position. 3D graphical presentation of multibeam echosounder scans is available as well as a graphical presentation of the filtered positions. All graphical windows can be printed on any Windows NT/2000/XP supported printer or plotter.
|
|
|
|
|
| High-level Applications |
NaviScan features series of high-level easy-to-use applications, which are specially designed for complex survey environment. Set-up is a program in which the system administrator sets up and maintains NaviScan by specifying the various sensors, communication interfaces, vessel or ROV offsets and C-O values. Extract is a simple data extractor, which allows export of data to spreadsheet, e.g. MS Excel. Extract supports generation of ASCII files with center depth and attitude data, position track (raw and filtered), Doppler data and pipetracker data with raw and edited positions. Graphical dump allows for all graphical windows to be printed on supported printer or plotter.
|
|
|
|
|
|
| Export |
|
|
NaviScan provides correction for offsets, heading, HRP, C-0, etc. All low-quality data is filtered out during data processing, where tide tables and sound velocity profiles can also be applied. Window filtering routines can be specified for removal of outer and/or specific beams. During this process, the system creates a conversion log, which gives the amount of discarded data. The collected data can be exported in various standard formats, which allows access to the collected data through use of 3rd party application software.
Side Scan Option
If the multibeam echosounder supports side scan sonar imagery (backscatter), NaviScan provides logging, correction and presentation the data. Data is presented as colour-coded waterfall backscatter display. The system includes correction for slant range and speed. During data collection and playback, targets in the side scan image can be marked and stored in special target image files for analysing during playback. |
|
|
|
|
|
|
|
|
|
|
Contour Module |
|
|
The Contour module allows real-time generation of digital terrain models during data collection. Presentation of colour-coded coverage plots provides monitoring of overlay between actual and previous data as well as non-coverage areas. Besides the average depth information Contour features graphical displays of min/max depth, data density, and standard deviation. Contour also provides display of contour curves specified by profiles (cross or longitudinal) defined by mouse click and drag. 3D view of the data features facilities for sun illumination, zoom & pan, perspective view setting, rotation and move around with close real-time feeling.
|
|
|
|
|
|
|
| Patch Test Calibration Module |
|
|
The patch test calibration module provides sophisticated patch tests based on Contour DTM for calibration of errors caused by roll, pitch, heading and time (position delay). The patch test comprises features for calibration of Doppler Log, which based on one or more data sets, compares raw positional track with Doppler/gyro track for calculation of scale factor and rotation angle.
|
|
|
|
|
|
|
|
| |
