Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Hyperspectral remote sensing for shallow waters. I. A semianalytical model

Not Accessible

Your library or personal account may give you access

Abstract

For analytical or semianalytical retrieval of shallow-water bathymetry and/or optical properties of the water column from remote sensing, the contribution to the remotely sensed signal from the water column has to be separated from that of the bottom. The mathematical separation involves three diffuse attenuation coefficients: one for the downwelling irradiance (K d), one for the upwelling radiance of the water column (K u C), and one for the upwelling radiance from bottom reflection (K u B). Because of the differences in photon origination and path lengths, these three coefficients in general are not equal, although their equality has been assumed in many previous studies. By use of the Hydrolight radiative-transfer numerical model with a particle phase function typical of coastal waters, the remote-sensing reflectance above (R rs) and below (r rs) the surface is calculated for various combinations of optical properties, bottom albedos, bottom depths, and solar zenith angles. A semianalytical (SA) model for r rs of shallow waters is then developed, in which the diffuse attenuation coefficients are explicitly expressed as functions of in-water absorption (a) and backscattering (b b). For remote-sensing inversion, parameters connecting R rs and r rs are also derived. It is found that r rs values determined by the SA model agree well with the exact values computed by Hydrolight (∼3% error), even for Hydrolight r rs values calculated with different particle phase functions. The Hydrolight calculations included b b/a values as high as 1.5 to simulate high-turbidity situations that are occasionally found in coastal regions.

© 1998 Optical Society of America

Full Article  |  PDF Article
More Like This
Hyperspectral remote sensing for shallow waters: 2. Deriving bottom depths and water properties by optimization

Zhongping Lee, Kendall L. Carder, Curtis D. Mobley, Robert G. Steward, and Jennifer S. Patch
Appl. Opt. 38(18) 3831-3843 (1999)

Model for the interpretation of hyperspectral remote-sensing reflectance

Zhongping Lee, Kendall L. Carder, Steve K. Hawes, Robert G. Steward, Thomas G. Peacock, and Curtiss O. Davis
Appl. Opt. 33(24) 5721-5732 (1994)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (29)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved