Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [WA-2 AGRICULTURE]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: CALIBRATION AND ATMOSPHERIC CORRECTION OF THE AVHRR FOR THE PURPOSES OF AGRICULTURAL MONITORING IN EUROPE. M. Sharman, R. Santer, A. Le Lerre

Document type:: Multivolume work

Structure type:: Chapter

BIBLIOGRAPHY Outline of the algorithm The AVHRR scene is treated block by block. The algorithm starts by calculating the gaseous transmittance values on the basis of the geometry of the scene and the entries in the appropriate tables. It then goes on to index the sun and satellite angle look-up tables. It then calculates, for both channels, the Rayleigh optical thickness over the block, and finally, pixel-by-pixel, it calculates the ground reflectance. "Thermal" channels: channel 4 and 5. Surface brightness temperature are calculated using the conventional split window technique, which is designed to take account of the water vapour content of the atmosphere. JRC-ESA AVHRR PRE-PROCESSING SOFTWARE The calibration and atmospheric correction modules form an integral part of the pre processing software, which includes cloud detection and a two-step automatic geometric correction module. Clouds are detected by their radiometric properties. The algorithm is based on the cascade philosophy used in the APOLLO algorithm (Saunders 1986), in which a series of tests take place, the most powerful first. Thresholds are set dynamically in small blocks of the imagery. During the geometric correction, an elliptical orbital model is used to navigate the data, after which they are registered accurately using GCPs detected automatically along the coastlines of Europe. When installed, this software will enable clients to order AVHRR data pre-processed to a known standard. Rather than, as at present, spending large amounts of time, effort and money on pre processing the data, the thematic user will then be able to start immediately to work on the aspects of the data which directly concern him. E S R I N (1986) European Utilisation of TIROS-N Data. Proposal for a Co-Ordinated Service. Report prepared by Royal Norwegian Council of Scientific and Industrial Research for ESA/ESRIN. Contract 6296/86/HGE- 1 Kaufman Y.J. and B.N. Holben ( in press) Calibration of the AVHRR visible and near-IR bands by atmospheric scattering, ocean glint and desert reflection. J. Appl. Met. Lauritson L.. G.J. Nelson. and F.W. Porto ( 198 9) Data extraction and calibration of TIROS-N/NOAA radiometers. N 0A A Technical Memorandum NESS-107. National Environmental Satellite Service, US Dept Commerce . Saunders R.W. (1986) An automated scheme for the removal of cloud contamination from AVHRR radiances over western Europe. IJRS. 7_:867. Smith G. R . . R.H. Levin. P. Abel and H. Jacobowitz (1988) Calibration of the solar channels of the NOAA-9 AVHRR using high altitude aircraft measurements. J. Atmos. Ocean. Technol. 5_( 5 ) : 6 31 - 639 Stavlor W.F. ( 1989) Degradation rates of the AVHRR visible channel for the NOAA 6, 7 and 9 spacecraft. J. Atmos. Ocean. Technol. In press. Tanré D.. Deroo C.. Duhaut P.. Herman M.. Morcrette J.J.. Perbos J. et P-Y. Peschamps ( 1986) Simulation of the Satellite Signal in the Solar Spectrum (5S). Laboratoire d'Optique Atmosphérique, Université des Sciences/Techniques de Lille, 59655 Villeneuve d'Asq Cedex, France Teillet P . M. . P , N . Slater, Y. Mao. Y. Ding. R.J. Bartel l , S.F. Biggar. R.P. Santer, R , D , Jackson and M.S. Moran (1988) Absolute radiometric calibration of the NOAA AVHRR sensors. SPIE conf . , Orlando Florida.

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