| Removal of Surface-Reflected Light for the Measurement of Remote-Sensing Reflectance from an Above-Surface Platform |
06 Dec 2010 |
13 pages |
| Authors:
Zhong-Ping Lee; Yu-Hwan Ahn; Curtis Mobley; Robert Arnone; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
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 | Using hyperspectral measurements made in the field, we show that the effective sea-surface reflectance (defined as the ratio of the surface-reflected radiance at the specular direction corresponding to the downwelling sky radiance from one direction) varies not only for different measurement scans, but also can differ by a factor of 8 between 400 nm and 800 nm for the same scan. This means that the derived water-leaving radiance (or remote-sensing ... |
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| Uncertainties of Optical Parameters and Their Propagations in an Analytical Ocean Color Inversion Algorithm |
20 Jan 2010 |
16 pages |
| Authors:
Zhong-Ping Lee; Robert Arnone; Chuanmin Hu; P J Werdell; Bertrand Lubac; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| Following the theory of error propagation, we developed analytical functions to illustrate and evaluate the uncertainties of inherent optical properties (IOPs) derived by the quasi-analytical algorithm (QAA). In particular, we evaluated the effects of uncertainties of these optical parameters on the inverted IOPs: the absorption coefficient at the reference wavelength, the extrapolation of particle backscattering coefficient, and the spectral ratios of absorption coefficients of phyloplankton and detritus/gelbstoff, respectively. With a ... |
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| Spectral Variability of Airborne Ocean Color Data Linked to Variations in Lidar Backscattering Profiles |
Jan 2009 |
12 pages |
| Authors:
M A Montes-Hugo; Richard W Gould; Zhong-Ping Lee; Robert A Arnone; Deric Gray; J Churnside; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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| Characterization of 3-D underwater light fields from above the sea surface requires passive and active remote sensing measurements. In this work, we suggest the use of passive ocean color sensors and lidar (Light Detection and Ranging) to examine the vertical structure of optical properties in marine waters of the Northern Part of the Gulf of Alaska (NGOA). We collected simultaneous airborne remote sensing reflectance (Rrs) in the spectral range 443-780 ... |
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| Test, Evaluate, and Characterize a Remote-Sensing Algorithm for Optically-Shallow Waters |
Jan 2009 |
9 pages |
| Authors:
Zhong-Ping Lee; MISSISSIPPI STATE UNIV MISSISSIPPI STATE
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| The long-term goal of this project is to provide reliable inversions of water column and bottom properties when the hyperspectral inversion algorithm, HOPE, is applied to any coastal area in which the Navy has an interest. The specific objective of the project is to test, and understand, the performance of the Hyperspectral Optimization Process Exemplar (HOPE), designed for derivation of water-column and bottom properties of optically shallow waters from spectral ... |
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| The Development of Imaging Spectrometry of the Coastal Ocean |
11 Jul 2007 |
5 pages |
| Authors:
Curtiss O Davis; Kendall L Carder; Bo-Cai Gao; Zhong-Ping Lee; W P Bissett; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
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| The Coastal Zone Color Scanner (CZCS) on NASA's Nimbus-7 satellite (1978-1986) demonstrated the utility of ocean color measurements for studying the dynamics of the ocean. The CZCS worked well for the continental shelf and open ocean regions. However, it did not have the spectral and spatial resolution needed to deal with the complexity of the coastal ocean. With the goal of developing tools suitable for the coastal ocean we initiated ... |
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