Depth Derivation from the Worldview-2 Satellite Using Hyperspectral Imagery
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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The Worldview-2 satellite, scheduled for launch in 2009, will have a multispectral sensor with several additional spectral bands not available on current multispectral sensors. This research investigates the use of the additional yellow spectral band to derive bathymetry. A hyperspectral image acquired from the AVIRIS sensor was used as a substitute image for the Worldview-2 multispectral sensor. The image was processed using the Stumpf et al. 2003 ratio method to determine bathymetry in a section of Kaneohe Bay, Hawaii. Depths acquired using the greenblue, yellowgreen and yellowblue ratios were compared to ground truth bathymetry derived from a digital nautical chart. The results indicate that using the Stumpf et al. 2003 algorithm with yellowgreen and yellowblue ratios improves the accuracy of derived depths compared to depths derived using the greenblue ratio, especially in shallow waters.
- Physical and Dynamic Oceanography
- Atomic and Molecular Physics and Spectroscopy