Consolidating the Workflow for Consolidating the Workflow for Combined Data SetsCombined Data Sets

by Lisa N. Brisson, Damon A. Wolfe, Josh Mode.

Traditional MethodsTraditional Methods

Towed Side Scan Sonar

Multibeam Echosounder

Acquisition Inefficiencies - MBESAcquisition Inefficiencies - MBES

Accurate Positioning

Tight Line Spacing

Poor Resolution/No Shadows

Acquisition Inefficiencies – Towed SSSAcquisition Inefficiencies – Towed SSS

Motion Artifacts

High Resolution Image of Targets

Processing InefficienciesProcessing Inefficiencies

Synthesized ApproachSynthesized Approach

• 6205 Swath Bathymetry and Dual Frequency Side Scan System– Wide Swath Coverage up to 10 x depth– Co-registered simultaneous bathymetric point data and dual frequency side

scan imagery– Chirp pulses for higher accuracy and extended range– Multipath and Wake Suppression– Total field of view is over 200 degrees with full coverage at Nadir– Lightweight and modular package

6205 Combined Bathymetry & Dual SS6205 Combined Bathymetry & Dual SS

CARIS HIPS Workflow for BathymetryCARIS HIPS Workflow for Bathymetry

Create Vessel File

Create a New HIPS Project

Convert Raw Data Files

Open Project & Background Data

Load Attitude and Navigation Data

Correct for Sound Velocity

Load Tide Information

Merge All Data

Define New Field Sheet

Create a Calibration (BASE) Surface

Check Auxiliary Sensors

Find Patch Test Values

Reapply Sound Velocity

Create and Apply Filters

Update Vessel File

Remerge All Data

Finalize Surface

Export Final Product

Perform Further Cleaning the Editors

Vessel FileVessel File

Navigation

Gyro

MRU

6205

Time Stamp

Vessel FileVessel File

SVP1 = SVP2 = Same Installation Offsets as Transducer 1 and 2. Do not input Roll, Pitch, or Yaw corrections.

Same as (1) but…

Converting Raw Data FilesConverting Raw Data Files

Conversion Wizard > Step 1: EdgeTech JSF> Step 2: Select Raw Data Files > Step 3: Designate Project, Vessel & Day > Step 4: Choose Navigation Coordinate System > Step 5: Define Project Area > Step 6: Specify Import Options for Both Bathymetry and Side Scan

Side Scan, yes?Frequency?From Where?

Bathymetry, yes?

Converting Raw Data FilesConverting Raw Data Files

Conversion Wizard > Step 6: Specify Import Options for Both Bathymetry and Side Scan

Transducer 1 Transducer 2

Converting Raw Data FilesConverting Raw Data Files

Conversion Wizard > Step 6: Specify Import Options for Both Bathymetry and Side Scan

Horizontal Binning

Angle Binning

Patch Test Method – Roll 1Patch Test Method – Roll 1

1

Patch Test Method – Roll 2Patch Test Method – Roll 2

2

2

Patch Test Method – Roll ValuesPatch Test Method – Roll Values

Patch Test Method - PitchPatch Test Method - Pitch

Patch Test Method - YawPatch Test Method - Yaw

Cleaning with the Aid of SS ImageryCleaning with the Aid of SS Imagery

Spikes

Fish

FishesShadows

CARIS SIPS Workflow for Side Scan ImageryCARIS SIPS Workflow for Side Scan Imagery

Open Project and Background Data

Clean Auxiliary Data

Compute Towfish Navigation

Beam Pattern Predictions

Preview Image Corrections with Side Scan Editor

Create New Field Sheet

Generate Mosaic

Create Vessel File

Open 3D Display Window

Drape Mosaic Over Final Surface

Generate Geo-referenced TIFF Image

6205 Final Mosaic6205 Final Mosaic

3D Rendering of Both Data Sets3D Rendering of Both Data Sets

• Traditionally a hydrographic survey would require two systems to acquire both independent data sets.

• Caris HIPS/SIPS provides reduced processing time and a simple workflow for large combined data sets.– Eliminates workflow in precisely co-registering the bathymetric point data with

the side scan imagery (i.e. no rubber-stitching).

• Additional side scan imagery can be inspected simultaneous to that of the bathymetry thereby ensuring valid bathymetry is not accidentally removed from the data set.

Conclusion

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