EIVA NaviScan 9.9.0: Advanced Software for Side-Scan Sonar and SAS Data Processing

EIVA NaviScan 9.9.0 is a specialized post-processing software application designed for the calibration, processing, analysis, and mosaicking of side-scan sonar and Synthetic Aperture Sonar (SAS) data. It is a critical tool in the marine survey toolbox for object detection, seabed classification, and detailed seabed imaging.

Core Philosophy: Transforming Acoustic Shadows into Definitive Imagery

NaviScan's primary function is to convert raw acoustic backscatter data from towfish, AUVs, or ROVs into high-resolution, geographically correct mosaics and target lists. It excels at identifying and analyzing discrete objects on the seabed, such as pipelines, wrecks, UXOs (Unexploded Ordnance), and natural features.

Key Features & Capabilities in NaviScan 9.9.0

Version 9.9.0 represents a mature release with a focus on advanced processing, target analysis, and integration.

1. Data Processing & Mosaicking

• Radiometric & Geometric Correximations: Applies essential corrections to raw sonar data:

  • Beam Pattern Correction: Normalizes the acoustic response across the sonar swath.

  • Slant Range Correction: Converts the slant range measurement to true ground range, correcting for the "fan-shaped" raw image.

  • Speed Correction: Compensates for variations in towfish speed to prevent image smearing or compression.

• Advanced Mosaicking Engine: Automatically stitches corrected sonar lines into seamless, geographically referenced seabed mosaics with balanced contrast and tonality.

2. Target Detection & Analysis

• Semi-Automatic Target Detection: Tools to automatically or manually pick potential targets (contacts) from the sonar imagery based on acoustic shadow, highlight, and shape.

• Target Measurement Suite: Precisely measure target dimensions (length, width, height from shadow), orientation, and position. This is crucial for UXO identification and pipeline inspection.

• Target Classification & Database: Catalog detected targets in a project database, assign classifications (e.g., "Rock," "Anthropogenic," "Pipeline"), add annotations, and attach photos from coupled cameras.

3. Support for Advanced Sonar Types

• High-Resolution Side-Scan Sonar: Standard support for all major side-scan sonar systems (EdgeTech, Klein, Sonardyne).

• Synthetic Aperture Sonar (SAS): Specialized processing capabilities for ultra-high-resolution SAS data from systems like Kraken Robotics or Sonardyne. This includes auto-focus and advanced beamforming parameter controls.

4. Integration & Reporting

• EIVA Ecosystem Workflow: Directly imports navigation and raw data from EIVA NaviPac. Processed mosaics and target lists can be exported to EIVA NaviModel for 3D integration with bathymetry and reporting.

• GIS & External Export: Export final mosaics as GeoTIFFs and target lists as shapefiles or CSV for use in GIS platforms (ArcGIS, QGIS) or client deliverables.

• Comprehensive Reporting: Generate target summary reports and mosaic coverage maps as part of the final survey deliverable package.