Abstract
The Ocean Portable Hyperspectral Imager for Low-Light Spectroscopy (Ocean PHILLS) is a hyperspectral imager specifically designed for imaging the coastal ocean. It uses a thinned, backsideilluminated CCD for high sensitivity and an all-reflective spectrograph with a convex grating in an Offner configuration to produce a nearly distortionfree image. The sensor, which was constructed entirely from commercially available components, has been successfully deployed during several oceanographic experiments in 1999-2001. Here we describe the instrument design and present the results of laboratory characterization and calibration. We also present examples of remote-sensing reflectance data obtained from the LEO-15 site in New Jersey that agrees well with ground-truth measurements.
Highlights
Optical remote sensing of coastal oceanic waters is key to Naval systems for bathymetry, mine hunting, submarine detection, and submerged hazard detection
The Ocean Portable Hyperspectral Imager for Low-Light Spectroscopy (Ocean PHILLS) is a hyperspectral imager designed for imaging the coastal ocean
Development of larger format detector arrays have extended the flexibility of designing high resolution, high signal-to-noise imaging spectrometers, allowing for wider swaths and higher spectral resolution, even for low albedo scenes such as the coastal ocean
Summary
Optical remote sensing of coastal oceanic waters is key to Naval systems for bathymetry, mine hunting, submarine detection, and submerged hazard detection. The Ocean PHILLS in its various forms of development has been deployed during several coastal oceanographic experiments Recent deployments include those as part of the Coastal Benthic Optical Properties (CoBOP) program [10] at Lee Stocking Island, Bahamas (May/June 1999 and May 2000) and as part of the Hyperspectral Coupled Ocean Dynamics Experiments (HyCODE) program [11] on the West Florida Shelf [12] (2000 and 2001) and at the LEO-15 site [13] in New Jersey (July 2000 and July 2001). Example data are provided from the 2001 deployment at LEO-15
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