HR: 17:45h
AN: G12A-08    [PDF]
TI: Inferring Environmental Information from SHOALS-1000 Waveform Data
AU: * Tuell, G H
EM: gradyt@optech.on.ca
AF: Optech International, Unit 110, Bldg 9313, Stennis, MS 39529 United States
AU: Park, J
EM: jypark@optech.on.ca
AF: Optech International, Unit 110, Bldg 9313, Stennis, MS 39529 United States
AB: In the SHOALS-1000 bathymetric laser system, water depth measurements are computed by time differencing the surface and bottom detections in multiple channels of the returned waveform data. The mechanics of this process are well understood and have been implemented in earlier generations of SHOALS technology (Guenther, 2000). Recently, there has been an increase in interest in using these waveforms to infer other environmental parameters. For example, (Wang and Philpot, 2003) have shown that the shape of the bottom return can be used to discriminate between land and water in very shallow water; (Elston, 2003) has shown that shape analysis can be used for benthic classification; and (Lee and Tuell, 2003) have shown that pseudoreflectance (an approximation of bottom reflectance at the laser wavelength) can also be used for classification. These are important innovations in that they contribute to our ability to conduct data fusion studies using decision-level algorithms as demonstrated by (Park, 2002). But other innovations are possible. Because the SHOALS waveforms are digitized at 1-ns intervals, it may soon be possible to use them to infer vertical structure of the water column. Here, we describe the data structure and availability of SHOALS waveform data and show pseudoreflectance imagery generated from recent data acquired at the South Florida Testing Facility.
UR: http://www.optech.on.ca
DE: 1294 Instruments and techniques
DE: 1625 Geomorphology and weathering (1824, 1886)
DE: 1640 Remote sensing
DE: 1824 Geomorphology (1625)
SC: Geodesy [G]
MN: 2003 Fall Meeting