The validation of estimates of ocean surface current speed and direction from high-frequency (HF) Doppler radars can be obtained through comparisons with measurements from moored near-surface current meters, acoustic Doppler current profilers, or drifters. Expected differences between current meter (CM) and HF radar estimates of ocean surface vector currents depend on numerous sources of errors...

interferometric synthetic aperture radar (insar) technique is valuable tool in monitoring crustal deformation due to its large spatial coverage and high spatial resolutions. in this paper, the intersiesmic crustal deformation occurred before earthquake on august 2012 in ahar-varzegan located in north-west of iran is studied using persistent scattering interferometry. the psi algorithm used in t...

Polarimetric radar measurements were conducted for bare soil surfaces under a variety of roughness and moisture conditions at 1.5, 4.75, and 9.5 GIIz at incidence angles ranging from 20" to 70". Using a laser profile meter and dielectric prohes, a complete and accurate set of ground truth data were collected for each snrface conditions, from which accurate measurement were made of the rms heigh...

Many hydrological algorithms have been developed to automatically extract drainage networks from DEM, and the D8 algorithm is widely used worldwide to delineate drainage networks and catchments. The simulation accuracy of the SWAT model depends on characteristics of the watershed, and previous studies of DEM resolution and its impacts on drainage network extraction have not generally considered...

The COPE field campaign operated from the 3rd July to the 20 th August 2013, with ground operations based in Davidstow Cornwall where the X-band polarimetric Doppler radar was located. Figure 1 shows the location of Davidstow, the Chilbolton S-band polarimetric Doppler radar and the C-band radars within the Met Office network. The Met Office Cobbacombe C-band radar was operational although not ...

The principles of SAR interferometry and interferogram generation, in particular phase unwrapping and geocoding, are described. Current issues of SAR interferometry are discussed: atmospheric effects on spaceborne repeat-pass interferometry limiting the accuracy and reliability of Digital Elevation Models (DEM), the Shuttle Radar Topography Mission (SRTM) resulting in a globally homogeneous DEM...

The principles of SAR interferometry, in particular phase unwrapping and geocoding, are described. Interferometric point positioning is treated based on a least squares approach avoiding approximations. Current issues of SAR interferometry are discussed: atmospheric effects on spaceborne repeat-pass interferometry limiting the accuracy and reliability of Digital Elevation Models (DEM), the Shut...

The generation of Digital Elevation Models (DEMs) from Synthetic Aperture Radar Interferometry (InSAR) has developed rapidly in the last 10 years. This new method proofed to be operational with the global success of the Shuttle Radar Topography Mission in the year 2000 and with several companies offering regional topographic mapping campaigns based on airborne InSAR today. However, the current ...

[1] Here we use Ice, Cloud and land Elevation Satellite (ICESat)-derived elevations and surface characteristics to investigate the Malaspina Glacier of southern Alaska. Although there is significant elevation variability between ICESat tracks on this glacier, we were able to discern general patterns in surface elevation change by using a regional digital elevation model (DEM) as a reference sur...