Correction of AVHRR shortwave channels for the effects of atmospheric scattering and absorption

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Remote Sensing of Environment; (United States)

DOI:https://doi.org/10.1016/0034-4257(93)90090-K· OSTI ID:5981645

Mitchell, R M; O'Brien, D M ^[1]

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1. CSIRO, Victoria (Australia)

This article presents a parameterization of multiple scattering by the atmosphere over a Lambertian surface for wavelengths corresponding to the shortwave channels of the Advanced Very High Resolution Radiometer (AVHRR). The method is developed by first considering scattering and absorption in the molecular atmosphere, in the absence of aerosols. Using this parameterization as a basis, the technique is extended to include aerosols, which are represented as being confined to thin layers. Physical variables retained explicitly in the parameterization include the surface albedo and the geometry of sun, target, and observer. The parameterization is computationally efficient and does not require extensive tabulations. Accuracy is typically better than 5% in the scattered component of the radiance and better than 1% in the total radiance for aerosol optical depths up to 0.20, over the full range of viewing geometry of the AVHRR. Errors in recovered surface albedo are considered in relation to uncertainties in the aerosol properties. An example is presented illustrating the application of the algorithm to the removal of atmospheric effects from vegetation indices.

• OSTI ID: 5981645
• Journal Information: Remote Sensing of Environment; (United States), Journal Name: Remote Sensing of Environment; (United States) Vol. 46:2; ISSN RSEEA7; ISSN 0034-4257
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ACCURACY
AEROSOLS
ALBEDO
ALGORITHMS
COLLOIDS
DATA COVARIANCES
DISPERSIONS
EARTH ATMOSPHERE
MATHEMATICAL LOGIC
MEASURING INSTRUMENTS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATION DETECTORS
RADIOMETERS
REMOTE SENSING
SOLS