搜索结果: 1-15 共查到“测绘科学技术 Sentinel-2”相关记录35条 . 查询时间(0.066 秒)
多时相InSAR技术具有探测大范围毫米级地表形变的能力，已被广泛应用于地面沉降监测。近几年，应用多时相InSAR技术监测以高铁为代表的大尺度人造线状地物形变备受关注。本文将C波段SAR数据用于高铁沿线路基形变监测，应用相位稳定性分析和改进的StaMPS技术来增加相干性点的密度和形变参数解算的稳定性。采用研究区时间跨度为21个月的47景Sentinel-1A数据，对连（云港）盐（城）高铁及其沿线区域...
时序Sentinel-1TOPS模式SAR数据精配准
TOPS 配准 相干性 Sentinel-1 SAR 增强谱分集
2021/6/30
Sentinel-1卫星星座采用TOPS作为默认成像模式，要求方位向配准精度达到0.001像素以便确保相邻burst干涉图的相位偏差小于3°。ESD技术是消除几何配准系统误差、纠正方位向配准偏移量的有效方法，但在低相干性场景或快速去相关的条件下，该方法配准精度会随着相干的降低而衰减，并导致配准误差的传播，造成干涉图出现相位跳变。为解决这一问题，本文提出一种TOPS模式数据时间序列配准方法。该方法在...
Sentinel-1卫星TOPS模式影像通常在几何配准的基础上，再次利用Burst重叠区域进行增强谱分集处理以实现高精度配准。几何配准主要依赖卫星轨道参数，难以进一步提高其配准精度，因此Sentinel-1影像配准的关键则是通过增强谱分集准确估计出几何配准后的残余偏移量。然而，增强谱分集易受失相干噪声等因素的影响，低相干条件下难以满足0.001像素的配准精度要求。因此本文首先针对单基线条件下的增强...
基于Sentinel-1A数据的多种机器学习算法识别冰山的比较
冰山 机器学习 Sentinel-1A SAR
2020/6/16
冰山识别对于海洋环境监测和船只安全运行等具有重要的意义，是北极航道开通和北极开发过程中的重要内容。采用合成孔径雷达（SAR）影像进行冰山识别具有独特的优势，多种机器学习算法均可用于SAR影像的冰山识别中。
MAPPING OF FOREST FIRE BURNED SEVERITY USING THE SENTINEL DATASETS
Sentinel Forest fire NBR dNBR RBR
2019/2/27
Forest fires are frequent phenomena in Uttarakhand Himalayas especially in the months of April to May, causing major loss of valuable forest products and impact on humans through the emissions and the...
CONSIDERATIONS ON THE USE OF SENTINEL-1 DATA IN FLOOD MAPPING IN URBAN AREAS: ANKARA (TURKEY) 2018 FLOODS
Flood Mapping Hazard Risk Sentinel Ankara (Turkey)
2019/2/28
Flood events frequently occur due to -most probably- climate change on our planet in the recent years. Rapid urbanization also causes imperfections in city planning, such as insufficient consideration...
EVAPOTRANSPIRATION ESTIMATION USING SSEBop METHOD WITH SENTINEL -2 AND LANDSAT-8 DATA SET
Evapotranspiration Sentinel-2 Landsat-8 SSEBop
2019/2/28
Estimation of evapotranspiration (ET) parameters is essential for understanding crop water requirements and to find out the ground water recharge. In situ data collection procedures are generally adop...
SENTINEL-1 AND SENTINEL-2 DATA FUSION FOR WETLANDS MAPPING: BALIKDAMI, TURKEY
Image Fusion Sentinel-1 Sentinel-2 Wetlands Object-Based Classification
2018/5/14
Wetlands provide a number of environmental and socio-economic benefits such as their ability to store floodwaters and improve water quality, providing habitats for wildlife and supporting biodiversity...
MEASURING SURFACE SUBSIDENCE IN WUHAN, CHINA WITH SENTINEL-1 DATA USING PSINSAR
Subsidence Monitoring TOPS PSInSAR Hazards Sentinel SARPROZ
2018/5/11
We use the potential of Sentinel-1 for urban subsidence monitoring. A case study was conducted in Wuhan using Sentinel-1A images acquired from 22nd June 2015 to the 24th of April 2017 acquired from an...
COLORIZING SENTINEL-1 SAR IMAGES USING A VARIATIONAL AUTOENCODER CONDITIONED ON SENTINEL-2 IMAGERY
Synthetic aperture radar (SAR) optical remote sensing Sentinel-1 Sentinel-2 deep learnig data fusion
2018/6/5
In this paper, we have shown an approach for the automatic colorization of SAR backscatter images, which are usually provided in the form of single-channel gray-scale imagery. Using a deep generative ...
VERIFICATION OF THE SENTINEL-4 FOCAL PLANE SUBSYSTEM
Multi-spectral camera system monitoring the atmosphere the focal plane subsystem the near infrared spectrum
2017/7/13
The Sentinel-4 payload is a multi-spectral camera system which is designed to monitor atmospheric conditions over Europe. The German Aerospace Center (DLR) in Berlin, Germany conducted the verificatio...
MTF DETERMINATION OF SENTINEL-4 DETECTOR ARRAYS
PSF measurement MTF evaluation CCD FPA Sentinel-4
2017/7/13
The Institute for Optical Sensor Systems was involved in many international space projects in recent years. These include, for example, the fokal plane array (FPA) of the hyperspectral sensors ENMAP o...
SENTINEL-2 GLOBAL REFERENCE IMAGE VALIDATION AND APPLICATION TO MULTITEMPORAL PERFORMANCES AND HIGH LATITUDE DIGITAL SURFACE MODEL
Sentinel-2 (S2) Global Reference Image (GRI) multi-temporal registration Digital Surface Model (DSM)
2017/7/13
In the frame of the Copernicus program of the European Commission, Sentinel-2 is a constellation of 2 satellites with a revisit time of 5 days in order to have temporal images stacks and a global cove...
COMBINED ANALYSIS OF SENTINEL-1 AND RAPIDEYE DATA FOR IMPROVED CROP TYPE CLASSIFICATION:AN EARLY SEASON APPROACH FOR RAPESEED AND CEREALS
crop type mapping Sentinel-1 RapidEye agriculture Support Vector Machine Maximum Likelihood
2016/12/1
Timely availability of crop acreage estimation is crucial for maintaining economic and ecological sustainability or modelling purposes. Remote sensing data has proven to be a reliable source for crop ...
ASSESSMENT OF CLASSIFICATION ACCURACIES OF SENTINEL-2 AND LANDSAT-8 DATA FOR LAND COVER/USE MAPPING
SENTINEL-2 LANDSAT-8 Remote Sensing Supervised classification Land Cover/ Use Mapping
2016/12/1
This study aims to compare classification accuracies of land cover/use maps created from Sentinel-2 and Landsat-8 data. Istanbul metropolitan city of Turkey, with a population of around 14 million, ha...