Side-Scan-Sonar Points for Hudson River, NY

Side Scan Point Files. These points correspond to individual pings which produced hte side-scan-sonar backscatter imagery. Sonar data were collected November 6 to December 15, 2009, in the estuary north from Saugerties to Troy. Data Collection and Processing: The interferometric system used to measure acoustic reflectivity, provided a quantitative measure of reflectivity for every square meter of the survey area. Fugro's system measured and recorded acoustic reflectivity that has a high dynamic range such that the full range of reflectivity's encountered in the estuary environment can be recorded while maintaining a constant gain setting on the system receiver. Reflectivity data from the GeoSwath was used to produce a normalized as well as a classified image of the bottom. Additionally, Fugro provided slope, aspect and hillshade models as additional acoustic parameters. Backscatter data processing was completed with CARIS 7.0. Raw XTF files were created by converting Hypack format (.HSX) into Triton format (.XTF). Points were exported from the raw XTF files at an interval of 400 pings (approximately 100 meters).
Original contact information:
Contact Name: John Ladd
Contact Org: Hudson River National Estuarine Research Reserve, NYS DEC
Phone: 845-889-4745
Email: jxLadd@gw.dec.state.ny.us