A surface soil moisture (SSM) product at a 1-km spatial resolution derived from the Envisat Advanced Synthetic Aperture Radar (ASAR) Global Monitoring (GM) mode data was evaluated over the entire African continent using coarse spatial resolution SSM acquisitions from the Advanced Microwave Scanning Radiometer for Earth Observing System (AMSR-E) and the Noah land surface model from the Global La...

to recognize and introduce the excellence works in the field of holy defense, the holy defense book festival is held yearly by bonyad-e hefz-e asar va arzshha-ye defae moqaddas. of the 2563 works published during the years 2011 to 2013, 9 titles from the publications of the center for holy defense documentation and research have nominated and commended to the jury to be rewarded or appreciated ...

Following the commissioning phase of the Advanced Synthetic Aperture Radar (ASAR) instrument on-board EnviSat decision was taken to re-deploy three of the existing four ASAR Transponders, specially procured for this instrument, from locations within The Netherlands to sites all over the world. The Re-Deployment of the ASAR Transponders describes a major activity in order to maintain the high le...

ENVISAT/ ASAR interferometry is a useful tool for the retrieval of geoand bio-physical parameters. In this paper the aim is show the quality of interferometric ENVISAT/ ASAR products. This objective will be approached in two ways. First, the timing accuracy of various ENVISAT/ ASAR products is evaluated. The geometric calibration and validation includes the determination of slant-range and azim...

The potential of FORMOSAT-2 and ENVISAT/ASAR for the monitoring of irrigated wheat crops over Tensift/Marrakech semi-arid plain in Morocco is investigated. The green leaf area index (GLAI) was obtained from time series of vegetation index acquired by the FORMOSAT-2 instrument with a 25% accuracy. This information was then incorporated into a canopy functioning model to provide spatial estimates...

The huge amount of daily generated data in smart cities has called for more effective storage, processing, and analysis technologies. A significant part this are streaming (i.e., time series data). Time similarity or dissimilarity measuring represents an essential critical task several mining machine learning algorithms. Consequently, a distance measure that can extract the similarities differe...

Nowadays, spaceborne Synthetic Aperture Radar (SAR) has become a powerful tool for providing significant wave height (SWH). Traditionally, validation of SAR derived SWH has been carried out against buoy measurements or model outputs, which only yield an inter-comparison, but not an “absolute” validation. In this study, the triple collocation error model has been introduced in the validation of ...

This paper presents the first comparison between repeat-pass coherence from ASAR and JERS-1 SAR. To reduce the influence of temporal decorrelation, repeat-pass pairs acquired during the winter season have been selected. ASAR 35day coherence and JERS-1 44-day coherence from six different test areas in Siberia and northern Europe have been evaluated. The results indicate that the decorrelation is...

The technique of Persistent Scatterers Interferometry allows the accurate measurement of ground displacements and overcomes the drawbacks of classical differential interferometry. Recently, the phase measurement continuity between ERS and ASAR has been demonstrated. In this contribution, we propose an approach for the use of ASAR IMS HH images together with ERS data and the ASAR ERSlike mode. I...

Capabilities and methods for snow mapping in mountainous areas using the Advanced Synthetic Aperture Radar (ASAR) on board of ENVISAT were investigated. For algorithm development the backscattering signatures of snow covered and snow free surfaces in Alpine valleys and on mountain slopes were studied with ASAR data of different look angles and polarizations in comparison with field measurements...