نتایج جستجو برای: سنتینل 1 sentinel 1
تعداد نتایج: 2764333 فیلتر نتایج به سال:
The synthetic aperture radar (SAR) imagery has been widely applied for flooding mapping based on change detection approaches. However, errors in the result are expected since not all land-cover changes flood-induced, and those sensitive to SAR data, such as crop growth or harvest over agricultural lands, clearance of forested areas, and/or modifications urban landscape. This study, therefore, i...
The time series of synthetic aperture radar (SAR) data are commonly and successfully used to monitor the biophysical parameters agricultural fields. Because, until now, mainly backscatter coefficients have been analysed, this study examines potentials entropy, anisotropy, alpha angle derived from a dual-polarimetric decomposition Sentinel-1 crop development. temporal profiles these analysed for...
Due to the growing use of Green Energy Sources (GESs), activities mapping, monitoring, measurement, and detection various GESs have become crucial. Assessing measuring are very complex since different environmental conditions occur. This importance is even greater when researchers face a shortage instruments tools in many parts world. GES assessment challenging task that requires accurate conti...
This paper investigates the use of high resolution (~100 m) surface soil moisture (SSM) maps to detect irrigation occurrences, in time and space. The SSM have been derived from series Copernicus Sentinel-1 (S-1) Sentinel-2 (S-2) observations. analysis focused on Riaza district Castilla y León region (Spain), where detailed information land use, scheduling, water withdrawal, meteorology parcel b...
فعّالیّتهای تکتونیکی و زمینساختی، همواره نقش مهمّی در تغییرات ژئومورفولوژیکی داشتهاند و شناسایی ماهیت و چگونگی حرکات زمینساخت جدید، در درک و تفسیر زمینریختها بسیار مورد توجّه است. در این پژوهش، حرکات زمینساختی در حوضة دشت اشتهارد و قزوین که در غرب و جنوب غرب تهران و در دامنههای جنوبی البرز قرار دارد، با استفاده از تکنیک تداخلنگار راداری انجام شده و شواهد این تغییرات با استفاده از نقشة ژئوم...
INTRODUCTION Common protocols for the detection of sentinel lymph nodes in early breast cancer often include the injection of the tracer 1 day before surgery. In order to detect enough activity on the day of surgery, the applied activity in many protocols is as high as several hundred MBq. So far, very few protocols with an activity below 20 MBq have been reported. We developed an ultralow-dose...
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