Improved Accuracy of the Remote Sensing of Sea Surface Temperature

Dalu, G.; Prabhakara, C.; Lo, R. C.

doi:10.1007/978-1-4613-3315-9_14

Cited by 8 publications

(2 citation statements)

References 3 publications

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“…The present choice of the AVHRR channels is justified by the attempt to keep the approximations introduced to obtain equation (7) within reasonable limits (McMillin and Crosby 1984). However, most of these approximations are not necessary (Dalu et al 1981), or can be overcome with optimization of the coefficients of equation (7) for the particular season and region under examination (Dalu et al 1985).…”

Section: Discussionmentioning

confidence: 98%

Satellite remote sensing of atmospheric water vapour

Dalu

1986

International Journal of Remote Sensing

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102

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The Advanced VeryHigh Resolution Radiometer (AVHRR-2)has two channels in the 10-13I'm window region. These channels are used for remote sensing of the sea surface temperature corrected for atmospheric absorption. The brightness temperature difference between the channels can be directly related to the atmospheric absorption due to water vapour. The problem of water-vapour retrieval from satellite data is examined in detail. The best evaluation of the watervapour content is obtained from the spectrometric data of the Infrared Interferometer Spectrometer (IRIS), with an error of about ± 3kg/rrr'. It is, however, feasible to obtain the water-vapour content from AVH RR data with an algorithm derived from radiative transfer model simulations. The retrieved water vapour has an error of ± 5 kg/m 2 when compared with ship data. It is possible to use the remotely sensed water vapour for the inference of the boundary-layer structure. The information is, however, limited for water vapour contained near the surface.

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Section: Discussionmentioning

confidence: 98%

Satellite remote sensing of atmospheric water vapour

Dalu

1986

International Journal of Remote Sensing

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102

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“…The coefficients of equation (4) increase as a function of the water vapour content (Dalu et al 1981, 1985, Dalu and Liberti 1986. Experimental evidence of this variation was recently presented by Saunders (1987).…”

Section: Comments On the Operational Swt Algorithmmentioning

confidence: 98%

An improved calibration scheme for AVHRR-2

Dalu

Viola

1987

International Journal of Remote Sensing

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The in-flight two-point calibration of the AVHRR-2 radiometer introduces an error in the brightness temperature derived from the II Jim and 12Jim channels, due to the non-linearity of the sensor response. The NOAA Users' Guide recommends assuming a negative value for the open space radiance to reduce this error for the range 225-310K. This range however is too large for typical sea surface temperature variations. and differencesas great as 0-4deg K are still present in the derived II /lm brightness temperature. This error is further amplified in the sea surface temperature, when estimated with the split window technique, as can be shown by radiative transfer model calculations. For this reason, a new practical calibration scheme is proposed to minimizethe error due to the non-linearity of the sensor response, over the range of radiances from the sea surface.

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The Earth Radiation

Dalu

Exploring the Atmosphere by Remote Sensing Techniques

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Improved Accuracy of the Remote Sensing of Sea Surface Temperature

Cited by 8 publications

References 3 publications

Satellite remote sensing of atmospheric water vapour

Satellite remote sensing of atmospheric water vapour

An improved calibration scheme for AVHRR-2

The Earth Radiation

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