نتایج جستجو برای: e asar
تعداد نتایج: 1017481 فیلتر نتایج به سال:
This paper summarizes the first results on interferometric ENVISAT/ ASAR image mode products [1]. We analyzed timing and geometric accuracy as well as the phase of a first interferogram from an IS2 image mode data set (VV polarized). According to the schedule the image mode products of this beam products are the first to be validated [2]. This interferogram is one of the first ENVISAT/ ASAR int...
ABSTRACT A method has been developed to apply multi-temporal Advanced Synthetic Aperture Radar (ENVISAT/ASAR, C-Band) images to snow cover monitoring and mapping in mountainous areas. A multi-temporal dataset that includes sequences of ascending and descending ASAR wide swath and beam mode IS2 scenes acquired over Switzerland was investigated. The images were geometrically corrected to remove r...
The main objective of this project is to develop and test methodology using ENVISAT ASAR data for agricultural applications, with an emphasis on land use, land cover classification and rice mapping. An optimal pre-processing chain for ASAR data is first constructed to provide input data to the classification steps. Experiments at the Zhangzhou test site, Fujian province, southern China, indicat...
Assessment and Update of Forest Classification Using Multi-parameter Satellite Sar Data for Ne China
The objective of this paper is to improve as well as to assess the performance of mapping forest by ENVISAT ASAR data and update forest map from ERS SAR images. The preliminary results of there test sites show it is very potential to use HH/HV ASAR AP data for forest map update. Tuqiang site have been undergoing dramatic changes during the last several decades due to the regeneration after fore...
Atmospheric phenomena often leave fingerprints on the sea surface, which are detectable by synthetic aperture radar (SAR). Here we present some representative examples of SAR images acquired by the Advanced Synthetic Aperture Radar (ASAR) onboard the Envisat satellite over the South China Sea (SCS) which show radar signatures of atmospheric gravity waves (AGWs) and of coastal wind fields. On SA...
پرتاب ماهواره های دارای سنجنده های راداری با گشودگی ترکیبی (SAR)، به منظور کاربردهای تداخل سنجی تفاضلی، فرصت جدیدی برای آشکارسازی و پایش تغییر شکل های بطئی، کند و حتی سریع زمین فراهم آورده است. این پژوهش با هدف مقایسه و ارزیابی کارایی دو سنجنده راداری در شناسایی، پایش و تهیه نقشه ثبت زمین لغزش در ارتفاعات دنای زاگرس واقع در جنوب استان اصفهان با استفاده از تکنیک تداخل سنجی تفاضلی تصاویر م...
Within the framework of the Flood DRAGON project, an assessment of ASAR Global Monitoring (GMM) data has been carried out over the Poyang Lake, Jiangxi province, P.R. China. This study consists of one of the first assessment of low resolution ASAR data, ENVISAT low rate mode, for land applications. Sixteen ASAR GMM images, which give a good overview of an on going situation over very large area...
Wildfires significantly affect the boreal ecosystem of Siberia. However, records on burnt areas and fire impact are still not satisfactory in Russia. The dense smoke from active burning and the persistent cloud covers impeded the application of optical sensors to the detection of burnt area in Siberia forest during the summer fire season. The high resolution SAR data are of limited use for burn...
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