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

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Multivolume work

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

CALIBRATION AND ATMOSPHERIC CORRECTION OF THE AVHRR FOR THE PURPOSES OF AGRICULTURAL MONITORING IN EUROPE M. Sharman Agriculture Project Institute for Remote Sensing Applications Joint Research Centre Ispra, Italy R. Santer Maître de Conferences Laboratoire d'Optique Atmosphérique Université des Sciences et Techniques de Lille Villeneuve d'Ascq, France A. Le Lerre Software Design and Implementation Remote Sensing Division Tecnodata Italia Frascati, Italy ISPRS Commission Number VII ABSTRACT The Commission established Communities has Remote Sensing (channels launch. radi a tion of the European Pilot Project of applied to Agricultural Statistics to monitor crop acreages and yields in Europe. This project uses high (SPOT and TM) and low-resolution (AVHRR) satellite data as sources of information. Although the high resolution data are satisfactorily calibrated, the visible and near infrared channels of the low resolution data 1 and 2) are not calibrated after The absorption and scattering of by atmospheric constituents are not accounted for in the data as they are received at the earth stations. The project's requirements for calibration and atmospheric correction for the AVHRR are described and the means by which it will satisfy these requirements are outlined. The methods used for calibration include those described in Kaufman and Holben, consisting of calibrating the visible channel (Ch1) by taking advantage of the characteristics of light received by the sensor from a target over the ocean, inter-calibrating visible and near infrared channels using Fresnel reflection near sun glint, and using desert reflection for both C h1 and C h 2 calibration. Atmospheric correction is based on the "5S" model of Tanré e t a l . . but uses look-up tables to speed up processing. Key Words: AVHRR, Calibration, Atmospheric correction, Agricultural Monitoring I NTRODUCTION a. The Pilot Project One of the major underpinnings of the European Community is the Common Agricultural Policy. The depends on a complex system of rules and subsidies, which the Community now has to maintain and enforce. This system was set up in part because of the considerable differences in agricultural production between the various European nations. It relies for its operation and management on accurate and recent agricultural statistics. Unfortunately each European country monitors and measures its agricultural production in its own way, so that the basic statistics are rarely directly comparable, and the manager's task is one of great subtlety and skill. If the system is to manage, the various difficult to collecting, become 11 systems analysing and reporting agricultural statistics must be upgraded and, especially, unified. Remote sensing seems to be the most promising technique. With these considerations in mind, the Commission of the European Communities therefore established, in September 1988, the Pilot Project of Remote Sensing applied to Agricultural Statistics. The aim of this project is to introduce remote sensing into the agricultural statistics system of the European Community as an additional source of data to complement the conventional existing sources. The Joint Research Centre is in charge of the project, whose orientation and aims are defined by the Directorate General VI (Agriculture) and the Statistical Office of the European Communities (OSCE ) . The results of this project will form part of an "Advanced System of Information on Agriculture". This system will be founded on remote sensing data from high- and low-resolution sensors and agro-meteorological models. In the pilot phase the emphasis is placed on remote sensing and agro-meteorological modelling, but it must be stressed that in operation, remote sensing will complement classical data, and is not expected to supplant them. The programme of the project includes 4 main actions: Action 1 (Regional Inventories) and Action 4 (Rapid Estimates at a European Scale) use high resolution imagery; Action 3 (Agro- meteorological modelling) uses mainly meteorological and soil data; while Action 2 (Vegetation Condition and Yield Indices), the subject of this presentation, uses low-resolution AVHRR data . b. Action 2: crop monitoring with low resolution radiometers In its action 2, the project is to develop and demonstrate the use of low-resolution satellite data from the Advanced Very High Resolution Radiometer (AVHRR) on board the NOAA satellites for monitoring crop condition and in estimating 178

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