نتایج جستجو برای: scale altimeter
تعداد نتایج: 578305 فیلتر نتایج به سال:
Observations of the sea surface height in the Argentine Basin indicate that strong variability occurs on a time scale of 20 30 days. The aim of this study is to determine the physical processes responsible for this variability. First, results are presented from two statistical techniques applied to a decade of altimetric data. A complex empirical orthogonal function (CEOF) analysis identifies t...
A global dataset of two years (September 1998 to December 2000) of ERS SAR data was reprocessed to more than one million SAR imagettes. Met ocean Parameters like significant ocean wave height (Hs), wind speed (U10) and mean wave period (Tm-10) are derived from the SAR images using a new empirical algorithm CWAVE [1]. The results are compared to collocated ERS altimeter data and in Situ measurem...
The algorithm of lengthened objects detection is based on statistical processing of reflected pulse altimeter signal. The method of maximum posteriori probability is applied to make a decision. Minimum of maximum posteriori probability is accorded with lengthened objects position. This fact is taken into account to detect the objects’ position. This algorithm allows autonomic navigation to be i...
Since the launch of ENVISAT satellite in 2002, the Radar Altimetry Mission provides systematic altimeter observations of the Earth surface. The ENVISAT Geophysical Data Records products contain, over all type of surfaces, altimeter ranges derived from four specialized retrackers: Ocean, Ice-1, Ice-2 and Sea-Ice retracker. Among the different goals of the ENVISAT Mission, one directly concerns l...
The wind/wave climatology for the Arctic Seas will be developed based on altimeter observations. It will have a major scientific and applied significance as presently there is no reference climatology for this region of the ocean available. The new versions of wave models for the Beaufort and Chukchi Seas will include new physics that is already under development, and the novel physics presentl...
The European satellite ENVISAT, following the previous ERS-1 and 2 will hold out some new features. Among those, the RA-2 altimeter will work, as previously, at 2 frequencies, but, if the Ku-band will still remain, the C-band will change for the S-band. The OSCAR project [1] concerns the use of the ENVISAT altimeter for exploring the potential of the nadir looking S-band for studying the ice sh...
[1] The Mars Orbiter Laser Altimeter (MOLA) measured the pulse width and energy of altimetric laser returns during the course of two Mars years of operations. As secondary science objectives, MOLA obtains the footprint-scale roughness and the bidirectional reflectivity of Mars. MOLA underwent extensive preflight calibration and pulse measurements were monitored continuously in flight, but anoma...
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