Errors in high-latitude SSTs and other geophysical products linked to NOAA-14 AVHRR channel 4 problems

Guillermo Podestá; Manuel Arbelo; Robert Evans; Katherine Kilpatrick; Vicki Halliwell; James Brown

doi:10.1029/2003GL017178

Errors in high-latitude SSTs and other geophysical products linked to NOAA-14 AVHRR channel 4 problems

Guillermo Podestá, Manuel Arbelo, Robert Evans, Katherine Kilpatrick, Vicki Halliwell, James Brown

Ocean Sciences

Research output: Contribution to journal › Article

6 Scopus citations

Abstract

Errors in brightness temperatures for channel 4 in the Advanced Very High Resolution Radiometer (AVHRR) onboard the NOAA-14 spacecraft are examined. The errors involve a low frequency of occurrence for some values, and a corresponding enhancement of frequency for others. Errors appear to be related to the conversion of analog to digital values. Unfortunately, it is not possible to identify and separate erroneous values. The most apparent errors in geophysical products derived from AVHRR's channel 4 occur at low brightness temperatures, therefore sea surface temperatures in high latitudes (below about 6°C) and cloud-related products must be used with caution, as they may have systematic errors as large as 0.5°C.

Original language	English (US)
Pages (from-to)	2-1 - 2-4
Journal	Geophysical Research Letters
Volume	30
Issue number	11
DOIs	https://doi.org/10.1029/2003GL017178
State	Published - Jun 1 2003

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

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Podestá, G., Arbelo, M., Evans, R., Kilpatrick, K., Halliwell, V., & Brown, J. (2003). Errors in high-latitude SSTs and other geophysical products linked to NOAA-14 AVHRR channel 4 problems. Geophysical Research Letters, 30(11), 2-1 - 2-4. https://doi.org/10.1029/2003GL017178

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abstract = "Errors in brightness temperatures for channel 4 in the Advanced Very High Resolution Radiometer (AVHRR) onboard the NOAA-14 spacecraft are examined. The errors involve a low frequency of occurrence for some values, and a corresponding enhancement of frequency for others. Errors appear to be related to the conversion of analog to digital values. Unfortunately, it is not possible to identify and separate erroneous values. The most apparent errors in geophysical products derived from AVHRR's channel 4 occur at low brightness temperatures, therefore sea surface temperatures in high latitudes (below about 6°C) and cloud-related products must be used with caution, as they may have systematic errors as large as 0.5°C.",

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AU - Podestá, Guillermo

AU - Arbelo, Manuel

AU - Evans, Robert

AU - Kilpatrick, Katherine

AU - Halliwell, Vicki

AU - Brown, James

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AB - Errors in brightness temperatures for channel 4 in the Advanced Very High Resolution Radiometer (AVHRR) onboard the NOAA-14 spacecraft are examined. The errors involve a low frequency of occurrence for some values, and a corresponding enhancement of frequency for others. Errors appear to be related to the conversion of analog to digital values. Unfortunately, it is not possible to identify and separate erroneous values. The most apparent errors in geophysical products derived from AVHRR's channel 4 occur at low brightness temperatures, therefore sea surface temperatures in high latitudes (below about 6°C) and cloud-related products must be used with caution, as they may have systematic errors as large as 0.5°C.

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