Release Performance Notes TN WBMS _R _Release_Presentation.pptx 22 September, 2014

Transcription

1 TN WBMS _R _Release_Presentation.pptx 22 September, 2014

2 Since the release, NORBIT has made tremendous improvements to both the functionality and performance of the WBMS systems. Increased ping rate (>40Hz), increased effective swath coverage (up to 179 ), greater range detection (down to 260m), a new detail mode for small feature articulation surveys (pipeline tracking, for example), decreased user control requirements, and more. Most notably, the adaptive ping rate is added to the WBMS s growing number of industry firsts and helps to highlight the companies fresh look at the multibeam sonar market. A leading design differentiator is the curved receiver array. Curved arrays eliminate, or greatly reduce, the occurrence of beam spreading as well as errors attributed to incorrect surface sound speed. The benefits are increased effective swath coverage of high resolution data and tolerance to changing conditions. Both promote ease of use and survey efficiency. The system was designed from the start as an FM system with 80kHz of bandwidth and long pulse capability. This has the advantage of driving a greater amount of sound energy into the watercolumn for increased range detection without loosing depth resolution as would a Constant Wave transmission system. NORBIT follows it s own route, join us

3 This document serves as both an introduction to the NORBIT WBMS family of systems as well as updating current users in the form of a release note. For existing users, new functionality in the current release is highlighted with an orange arrow. NEW Please contact subsea_support@norbit.com for a free firmware update (as always, firmware releases and support carry no additional charge). While NORBIT makes every effort to ensure documentation is up to date and easy to understand we realize that additional explanations may be required. Never hesitate to contact subsea_support@norbit.com

4 The system arrived in Portland, Oregon in a complete single protective case. Seahorse provided software licenses (QINSy, Hypack, EIVA, CARIS & POSPac), a laptop, AML sound speed profiler and the boat. The iwbms case contains all cables, GNSS antennas, power leads, mounting bolts, topside Integrated Sonar Interface Unit (isiu) and iwbms on a robust electrically & galvanically isolated mounting bracket. The cables from the wet-end must run up through the sonar pole.

5 Release Test Locations Intensive sea- trials were carried out in fresh and salt waters in Seattle, Washington and Portland, Oregon USA. Test sites were chosen to provide as much bottom type and watercolumn diversity as could reasonably be obtained. Test Sites: Seattle, WA USA Salt Water ( PSS), 12 C Portland, OR USA Fresh Water ( 0. 0 PSS), 7 C All depth are in metres

6 Seattle Test Locations Extinction Test Jetty Survey 220m Test 70m Test NOAA Ref (Wrecks) 100m Test Small Sewer Outfall 20m Test Large Sewer Outfall

7 Portland Test Locations Sand waves 14m Test Breakwater Cars Barge

8 Survey Setup System installation and software configuration procedure: 1. Mount iwbms use eye to align system parallel with boat keel 2. Mount GNSS antennas 5 / 8 bolts were already affixed and in-line with boat keel 3. Run cables and energize system connect to shore-side RTK (radio or NTRIP) 4. Use POSView v Installation Calibration & Control to determine Ref to Primary GNSS offsets. Once complete, repeat to ensure determined values are within +/- 1 cm 5. Use POSView GAMS Calibration Control to determine secondary antenna location. Once complete, repeat to ensure determined values are within +/- 1 cm 6. Setup Hypack 2014, offset the IMU and sonar to vessel Center of Rotation. 7. Take sound cast and verify to sonar local sound speed sensor 8. Survey... Survey Vessel SheHorse heading upstream on Willamette River, Portland. Sand ripples in Columbia River between Portland, Oregon and Vancouver, Washington

9 Swath Performance Test Notes Reference surfaces were created with survey lines spaced one times water depth and 90degree swaths. Due to time, test areas were run in only one reciprocal direction (ex. North/South). Reference surface data was then cleaned. A cross-line was then run through the middle of the reference surface areas orthogonally to the surface generation lines (ex. East and/or West). Cross-lines were cleaned insofar as to only remove obvious gross outliers. Conditions in Seattle were not ideal with vessel roll up to 12. As the IMU was in the sonar head, the effect of the motion was seldom seen. Positions were refined with PPK (Post Processed Kinematic) utilizing a single base solution. 100m reference surface with 5 main-scheme lines and one cross-line.

10 Extinction Test Seattle Max Depth > 270m Release Performance Notes

11 Extinction Test Seattle Max Depth > 270m Release Performance Notes

12 Jetty Survey - Seattle Suction dredge marks Rock dump line Jetty rocks detected to within +/-4cm at 6m depth

13 Jetty Survey - Seattle Release Performance Notes

14 Jetty Survey - Seattle The WBMS has a 179 swath width. This is practical for surveying up shorelines, bridge piers, bulkheads, etc. The swath was set to 130 and rotated to port by 24. This allowed for surveying below the water level by a few centimeters below the sonar draft.

15 Large Sewer Outfall - Seattle Release Performance Notes

16 Large Sewer Outfall - Seattle Despite heavy motion, pipe easily detected on multiple passes

17 Small Sewer Outfall - Seattle Small diameter pipe.

18 NOAA Reference Area (Wrecks) Seattle Release Performance Notes

19 Breakwater - Portland 3 Passes with excellent agreement Two cars one upside down with front wheels turned. Depth 9m

20 Barge - Portland 6 passes. Excellent agreement over rock, sand, mud and steel

21 Sand Waves - Portland Release Performance Notes

22 Sand Waves - Portland Easily discern 4-5cm sand ripples in 9m water depth.

23 NEW New Features & Changes Adaptive Ping Rate The bottom is here Adaptive ping rate allows user to set very long depth ranges (should the bottom drop suddenly). Meanwhile the system will continue to ping as fast as possible. The ping rate is here The farthest bottom detection sets the listening window and therefore the ping rate. The range is this Gives user highest along track sounding density and time to get a cup of coffee while online.

24 NEW New Features & Changes INSPECT Mode INSPECT mode changes the beamformer algorithm for highest detail returns in the near-nadir region (or anywhere that incidence angle is closest to 0 ) such as piers/bulkheads/breakwaters. Data outside of this region quickly deteriorates as incidence angle increases.

25 NEW New Features & Changes INSPECT Mode Bathy Mode INSPECT Mode Above shows results from detection of a 4 aluminum pipe at 4m water depth. Note that INSPECT mode detection size is 0.21m while Bathy mode is 0.46m.

26 NEW New Features & Changes Range Gate Ideal for those rare detail bank-bank survey requirements. Allows bottom detection to depths beyond lower depth gate without decreasing ping rate.

27 NEW New Features & Changes Automatic Zoom Automatically zooms into the effective swath coverage. This feature is most beneficial when used with Adaptive Ping Rate. Even while using a very deep lower depth gate, the seafloor will be in full view.

28 NEW New Features & Changes Wedge Zoom A wedge zoom function that allows user to zoom into any part of the wedge display for detailed viewing. Zoom windows may be resized to any dimension.

29 NEW New Features & Changes Cleaner Installation/Version Handling The system will now fully uninstall legacy GUI versions.

30 NEW New Features & Changes System Health Log A detailed log file is updated to alert of status/notices/warnings and errors. This log may then be copied to clipboard and pasted into an (subsea_support@norbit.com).