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:: [THP-4 MICROWAVE SENSING]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: SOIL MOISTURE DETERMINATION WITH USE OF SMMR DATA. Yann H. Kerr

Document type:: Multivolume work

Structure type:: Chapter

715 ■ • ’ ;; sr ■? ■ yL'U ; * SOIL MOISTURE DETERMINATION WITH USE OF SMMR DATA Yann H. Kerr LERTS 18 Ave E. BELIN 31055 TOULOUSE cedex FRANCE ABSTRACT A radiative transfer model for simulating microwave brightness temperatures over land surfaces is described. The model takes into account sensor viewing characteristics (spacecraft altitude, viewing angle, frequency, polarization) and atmospheric parameters, over a surface characterized by its moisture, roughness and temperature, and covered with a layer of vegetation characterized by its temperature, integrated water content, single scattering albedo, structure, and percent coverage. In order to reduce the influence of atmospheric and surface temperature effects, the brightness temperature are expressed as polarization ratios, which depend primarily on the soil moisture and roughness, canopy water content, and percentage cover. The paper describes the model used and investigates the sensitivity of the polarization ratio to these parameters. Simulation of temporal evolution of the microwave signal over semi-arid areas in the African Sahel is presented and compared to actual satellite data from the SMMR instrument on Nimbus-7. Finally an inversion algorithm is described together with the first results gained over the Sahelian zone.

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fullscreen: Proceedings of the Symposium on Global and Environmental Monitoring (Part 1)

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