Results 21 to 30 of about 20,649 (261)

Testing Sentinel-1 SAR Interferometry Data for Airport Runway Monitoring: A Geostatistical Analysis

Sensors, 2021
Multi-Temporal Interferometric Synthetic Aperture Radar (MT-InSAR) techniques are gaining momentum in the assessment and health monitoring of infrastructure assets. Amongst others, the Persistent Scatterers Interferometry (PSI) technique has proven to be
Valerio Gagliardi, Luca Bianchini Ciampoli, Sebastiano Trevisani, Fabrizio D’Amico, Amir M. Alani, Andrea Benedetto, Fabio Tosti   +6 more
doaj   +1 more source

Coseismic surface deformation of the 2014 Napa earthquake mapped by Sentinel-1A SAR and accuracy assessment with COSMO-SkyMed and GPS data as cross validation

International Journal of Digital Earth, 2017
The new land observation satellite Sentinel-1A was launched on 25 April 2014 with a C-band synthetic aperture radar (SAR) sensor, which has the significant enhancements in terms of revisit period and high resolution.
Yinghui Yang, Qiang Chen, Qian Xu, Yijun Zhang, Qi Yong, Guoxiang Liu   +5 more
doaj   +1 more source

MULTI-TEMPORAL FEATURE EXTRACTION FOR PRECISE MAIZE AREA MAPPING USING TIME-SERIES SENTINEL 1A SAR DATA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
A research study was conducted to map maize area in Ariyalur and Perambalur districts of Tamil Nadu, India using multi-temporal features extracted from time-series Sentinel 1A SAR data.
M. Venkatesan, S. Pazhanivelan, N. S. Sudarmanian   +2 more
doaj   +1 more source

Independent Verification of the Sentinel-1A System Calibration

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2014
In the frame of the GMES program, the main objective of the Sentinel-1 mission is to ensure the continuity of SAR data acquisitions in C-band for global earth monitoring. Sentinel-1A is the first of two C-band satellites launched in April 2014. In addition to the commissioning of Sentienl-1A executed by ESA, an independent verification of the system ...
Marco Schwerdt, Kersten Schmidt, Nuria Tous-Ramon, Gabriel Castellanos Alfonzo, Björn J. Döring, Manfred Zink, Pau Prats-Iraola   +6 more
openaire   +2 more sources

Early validation of operational SAR wind retrievals from Sentinel-1A [PDF]

2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015
The computation of wind speeds at high (< 1 km) resolution from spaceborne synthetic aperture radar (SAR) is a mature geophysical application. A number of researchers, a modest sample of which are cited [1, 2, 3, 4, 5, 6, 7], have described the geophysical relationship between normalized radar cross section (NRCS) and ocean surface wind speed, and how ...
Francis M. Monaldo, Christopher R. Jackson, William Pichel, Xiaofeng Li 0001   +3 more
openaire   +2 more sources

Rice-Field Mapping with Sentinel-1A SAR Time-Series Data [PDF]

Remote Sensing, 2020
This study proposed a feature-based decision method for the mapping of rice cultivation by using the time-series C-band synthetic aperture radar (SAR) data provided by Sentinel-1A. In this study, a model related to crop growth was first established.
Lena Chang, Yi-Ting Chen 0006, Jung-Hua Wang, Yang-Lang Chang   +3 more
openaire   +2 more sources

Sentinel-1A – First precise orbit determination results

Advances in Space Research, 2017
Sentinel-1A is the first satellite of the European Copernicus programme. Equipped with a Synthetic Aperture Radar (SAR) instrument the satellite was launched on April 3, 2014. Operational since October 2014 the satellite delivers valuable data for more than two years. The orbit accuracy requirements are given as 5 cm in 3D.
Peter-Contesse, H. (author), Jäggi, Adrian (author), Fernández, JJ (author), Escobar, D. (author), Ayuga, F. (author), Arnold, D (author), Wermuth, M. (author), Hackel, S. (author), Otten, M. (author), Simons, W.J.F. (author), Visser, P.N.A.M. (author), Hugentobler, U. (author), Féménias, P. (author)   +12 more
openaire   +4 more sources

Independent System Calibration of Sentinel-1B

Remote Sensing, 2017
Sentinel-1B is the second of two C-Band Synthetic Aperture Radar (SAR) satellites of the Sentinel-1 mission, launched in April 2016—two years after the launch of the first satellite, Sentinel-1A.
Marco Schwerdt, Kersten Schmidt, Núria Tous Ramon, Patrick Klenk, Nestor Yague-Martinez, Pau Prats-Iraola, Manfred Zink, Dirk Geudtner   +7 more
doaj   +1 more source

Radiometric Comparison within the Sentinel-1 SAR Constellation over a Wide Backscatter Range

Remote Sensing, 2020
Radiometric calibration adjusts the measured pixel intensity to a physical property, the radar cross section (RCS). After calibration, this relationship is defined over the entire backscatter range: from low image power (near noise) up to high ...
Kersten Schmidt, Marco Schwerdt, Nuno Miranda, Jens Reimann   +3 more
doaj   +1 more source

EFFECT OF DIFFERENT SEGMENTATION METHODS USING OPTICAL SATELLITE IMAGERY TO ESTIMATE FUZZY CLUSTERING PARAMETERS FOR SENTINEL-1A SAR IMAGES [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Optical and SAR data are efficient data sources for shoreline monitoring. The processing of SAR data such as feature extraction is not an easy task since the images have totally different structure than optical imagery.
B. Bayram, N. Demir, B. Akpinar, S. Oy, F. Erdem, T. Vögtle, D. Z. Seker   +6 more
doaj   +1 more source