文章基本信息

标题：The Use of Envisat Alternating Polarization Sar Images in Agricultural Monitoring in Comparison with Radarsat-1 Sar Images
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作者：M. Karjalainen ; H. Kaartinen ; J. Hyyppä 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXV Part B7
页码：132-137
出版社：Copernicus Publications
摘要：In this paper Envisat alternating polarization SAR images were used in the agricultural monitoring and yield damage assessment. The main advantage of using synthetic aperture radar (SAR) is that satellite images can be acquired frequently at user-specified times from the target area, even through clouds. Consequently, agriculture has been considered as one of the most promising civilian application areas of SAR imagery. Our test area is located in the Western Finland near the city of Sein.joki. The test area is one of the northernmost consistent agricultural areas in the world and it is situated approximately at the latitude of 63° north. The main food crops are barley and oats, however, small areas of wheat and rye are also cultivated. A corresponding agricultural monitoring project was carried out in summer 2001 in the same test area using Radarsat-1 Fine beam SAR images, therefore, a comparison of the usability of Envisat ASAR and Radarsat-1 SAR images in the agricultural monitoring can be made. In order to carry out the research, altogether 16 Envisat ASAR images were requested from the summer 2003. The image request was possible in the framework of ESA's Envisat announcement of opportunity (AOE-488). In order to collect reference data, ground survey campaigns were organized for the selected set of test parcels simultaneously with each image acquisition. The ground surveys consisted of measurements of soil roughness, soil moisture and crop height, as well as general notes about growing stage and possible yield damages caused by drought or lodging. First results of the suitability of Envisat SAR images in the agricultural monitoring will be presented, as well as a projection of the usability of SAR images in the yield estimation will be made
关键词：Agriculture; SAR; polarization; satellite; monitoring