advanced very high resolution radiometer AVHRR

advanced very high resolution radiometer AVHRR
Author: Arthur P. Cracknell
Publisher: CRC Press
Total Pages: 558
Release: 1997-04-23
Genre: Technology & Engineering
ISBN: 9780748402090

Since the launch of the first of the Advanced Very High Resolution Radiometers (AVHRRs) in 1978, the data from these instruments has used for a wide range of non-meteorological applications. In this book, the author describes satellite system, AVHRRs, control of the spacecraft, and data- recovery arrangements. The book covers processing of the data to extract useful environmental information. The applications of the data to marine problems, based primarily on the study of sea-surface temperatures from the thermal-infrared channels of the instrument, are considered, as well as the study of vegetation and a whole variety of other land-based and hydrological applications.

Possible Measurement Errors in Calibrated AVHRR (Advanced Very High Resolution Radiometer) Data

Possible Measurement Errors in Calibrated AVHRR (Advanced Very High Resolution Radiometer) Data
Author: Robert P. D'Entremont
Publisher:
Total Pages: 21
Release: 1988
Genre:
ISBN:

Visible and infrared meteorological satellite data are a primary source of global cloud observations. Such data are calibrated in order to provide its users with a method for converting from 'raw' measurements, called counts, to physically sensible measurements such as albedo or brightness temperature. This report describes the procedure for converting National Oceanic and Atmospheric Administration Advanced Very High Resolution Radiometer (NOAA AVHRR) raw counts to albedos and brightness temperatures. This procedure involves the use of 'calibration coefficients' that help define the relationship between the raw counts and the physical measurements they represent. Such relationships are referred to as 'look-up-tables'. In theory, calibration coefficients (and therefore look-up tables) do not change noticeably from one scanline of satellite data to the next. This makes feasible the generation of a constant look-up table that can be used over long periods of time for all data. In practice, calibration coefficients can and often do change from one scan to the next. These changes imply accuracy errors in measured brightness temperatures that are significant for some satellite data analysis algorithms; others are less severely affected. This report addresses the potential errors that can be expected when using constant look-up tables, i.e., by assuming that sensor calibration does not change from one scanline to the next. (fr).

The Advanced Very High Resolution Radiometer AVHRR

The Advanced Very High Resolution Radiometer AVHRR
Author: Arthur P. Cracknell
Publisher: CRC Press
Total Pages: 556
Release: 2024-11-01
Genre: Technology & Engineering
ISBN: 1040293603

Since the launch of the first of the Advanced Very High Resolution Radiometers (AVHRRs) in 1978, the data from these instruments has used for a wide range of non-meteorological applications. In this book, the author describes satellite system, AVHRRs, control of the spacecraft, and data- recovery arrangements. The book covers processing of the data to extract useful environmental information. The applications of the data to marine problems, based primarily on the study of sea-surface temperatures from the thermal-infrared channels of the instrument, are considered, as well as the study of vegetation and a whole variety of other land-based and hydrological applications.

Nonlinearity Corrections in Calibration of Advanced Very High Resolution Radiometer Infrared Channels

Nonlinearity Corrections in Calibration of Advanced Very High Resolution Radiometer Infrared Channels
Author:
Publisher:
Total Pages: 8
Release: 1990
Genre:
ISBN:

The infrared channels of the advanced very high resolution radiometer (AVHRR) are calibrated in-flight with data acquired when the AVHRR views space and a warm target on board. This determines the two coefficients of a linear calibration equation. However, in its 11- and 12- micron channels the response of the AVHRR is nonlinear. If not accounted for, the nonlinearity could cause errors as large as 2 C in inferred scene temperatures. Therefore NOAA/National Environmental Satellite, Data, and Information Service (NESDIS) computes corrections to the brightness temperatures inferred from the linear calibration. This paper describes how the corrections have been calculated at NESDIS since March 1986 and presents the corrections for the AVHRRs on the NOAA 9, 10, and 11 satellites. The corrections are calculated from results of the prelaunch calibration, in which a calibrated laboratory blackbody illuminates the AVHRR. At NESDIS the calculation of the corrections differs from that of Brown et al. (1985) because NESDIS transfers the calibration of the corrections of the laboratory blackbody to the internal calibration target of the AVHRR, but Brown et al. do not. The absolute radiometric accuracy of AVHRR data that have been corrected for the nonlinearity is approximately 0.55 C, of which 0.35 C is traceable to the calibration of the laboratory blackbody. Keywords: Reprints.

Possible Measurement Errors in Calibrated AVHRR Data

Possible Measurement Errors in Calibrated AVHRR Data
Author: Robert Paul D'Entremont
Publisher:
Total Pages: 30
Release: 1988
Genre: Atmosphere
ISBN:

Visible and infrared meteorological satellite data are a primary source of global cloud observations. Such data are calibrated in order to provide its users with a method for converting from 'raw' measurements, called counts, to physically sensible measurements such as albedo or brightness temperature. This report describes the procedure for converting National Oceanic and Atmospheric Administration Advanced Very High Resolution Radiometer (NOAA AVHRR) raw counts to albedos and brightness temperatures. This procedure involves the use of 'calibration coefficients' that help define the relationship between the raw counts and the physical measurements they represent. Such relationships are referred to as 'look-up-tables'. In theory, calibration coefficients (and therefore look-up tables) do not change noticeably from one scanline of satellite data to the next. This makes feasible the generation of a constant look-up table that can be used over long periods of time for all data. In practice, calibration coefficients can and often do change from one scan to the next. These changes imply accuracy errors in measured brightness temperatures that are significant for some satellite data analysis algorithms; others are less severely affected. This report addresses the potential errors that can be expected when using constant look-up tables, i.e., by assuming that sensor calibration does not change from one scanline to the next.

Advances in the Use of NOAA AVHRR Data for Land Applications

Advances in the Use of NOAA AVHRR Data for Land Applications
Author: Giles D'Souza
Publisher: Springer Science & Business Media
Total Pages: 484
Release: 2013-11-11
Genre: Technology & Engineering
ISBN: 9400902034

An up-to-date, detailed set of notes covering all aspects of NOAA AVHRR data collection, pre-processing, analysis and application. Includes many FTP sites, e-mail addresses and URL locations. Some chapters address particular aspects of the NOAA AVHRR system, such as radiometric calibration and geometric correction, while others provide general information of interest to any remote sensing study, such as radiative transfer modelling and atmospheric correction. The publication of a book that covers all important aspects of the treatment and understanding of the data in one volume makes the work a convenient, informative `recipe book' that is sure to become a favourite for all users of NOAA AVHRR data.