Seafloor mapping using interferometric sonars

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The side scan search pattern gives full coveragehigh resolution <strong>interferometric</strong> surveys:/ 28 / 30-Nov-09930m x 780m, 8m to 25m deep, 2h survey time28
High accuracy surveying also requires:•Data Timing and Time Synchronisation:• Sub-ms PPS timing and use of time stamped ancillary data.•Navigation accuracy:• RTK GPS, or postprocessed position and attitude• Accurate sound velocity profiles• Minimise possible offset error sources:• Minimise lever arms• Align reference frame axes• Accurately measured offsets• Accurate ancillary data• Good calibration: multiple patch tests, cross-checksUsing above have demonstrated
Page 1 and 2: Seafloor Mapping Using Interferomet
Page 3 and 4: Introduction to Interferometric Son
Page 5 and 6: The data products:Side scan transmi
Page 7 and 8: Limitation: Interferometric Noise S
Page 9 and 10: Basics of Interferometric Data Proc
Page 11 and 12: 11 / 30-Nov-09The GeoAcoustics GeoS
Page 13 and 14: GeoSwath Transducer Specifications:
Page 15 and 16: Suitable for very small survey vess
Page 17 and 18: GeoSwath Data Processing summary/ 1
Page 19 and 20: Unfiltered and filtered raw data/ 1
Page 21 and 22: Single swath binned at 50cm without
Page 23 and 24: 500kHz GeoSwath: bathymetry and sid
Page 25 and 26: 25 / 30-Nov-09Data density at diffe
Page 27: Running a Survey: the side scan sea
Page 31 and 32: 31 / 30-Nov-09Vessel and retractabl
Page 33 and 34: Data Comparison Tests by Rijkswater
Page 35 and 36: Interferometer vs Beamformer Compar
Page 37 and 38: Bathymetry and Sediment Classificat
Page 39 and 40: POS-MV SBET processing vs tide and
Page 41 and 42: GeoSwath Plus for ROVs and AUVs/ 41
Page 43 and 44: 43 / 30-Nov-09500KHz Transducers an
Page 45 and 46: 45 / 30-Nov-09GeoSwath Plus on Mine
Page 47 and 48: Sidescan and bathymetry/ 47 / 30-No
Page 49 and 50: GeoSwath AUVGeneric AUV application
Page 51 and 52: 51 / 30-Nov-09GeoSwath on the Hydro
Page 53 and 54: GeoSwath on the Gavia AUV2.6mPropul
Page 55 and 56: Pre-lay pipe trench survey using AU
Page 57 and 58: Portable AUVs for difficult deploym
Page 59 and 60: 59 / 30-Nov-09Mission data
Page 61 and 62: 61 / 30-Nov-09GeoSwath Plus on Gavi
Page 63 and 64: 63 / 30-Nov-09The edge of the coral
Page 65 and 66: 65 / 30-Nov-09The AUV track lines d
Page 67 and 68: 67 / 30-Nov-09… with simultaneous
Page 69: Kongsberg Maritime/ 69 / 30-Nov-09

Seafloor mapping using interferometric sonars

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