Exploració per tema "geophysical measurement technique"
Ara es mostren els items 1-8 de 8
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A two-dimensional doppler-radiometer for earth observation
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-07-31)
Article
Accés obertCompared to synthetic aperture radars (SARs), the angular resolution of microwave radiometers is quite poor. Traditionally, it has been limited by the physical size of the antenna. However, the angular resolution can be ... -
Compensation of elevation angle variations in polarimetric brightness temperature measurements from airborne microwave radiometers
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-01-31)
Article
Accés obertThis paper presents a method for compensating the elevation angle fluctuations occurring in airborne radiometry due to aircraft roll and pitch. The correction is based on a radiative transfer model, and is demonstrated by ... -
Indoor experiments on polarimetric SAR interferometry
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-03-31)
Article
Accés obertA coherence optimization method, which makes use of polarimetry to enhance the quality of SAR interferograms, has been experimentally tested under laboratory conditions in an anechoic chamber. By carefully selecting the ... -
On-board phase and modulus calibration of large aperture synthesis radiometers: study applied to miras.
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-07-01)
Article
Accés obertOn-board calibration of bidimensional aperture synthesis radiometers with a large number of antennas by the standard correlated noise injection method is technologically very critical because of the stringent requirements ... -
Radiometric sensitivity computation in aperture synthesis interferometric radiometry
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-03-01)
Article
Accés obertThis paper is concerned with the radiometric sensitivity computation of an aperture synthesis interferometric radiometer devoted to Earth observation. The impact of system parameters and the use of simultaneous redundant ... -
Radiometric Sensitivity Computation in Aperture Synthesis Interferometric Radiometry
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-03-31)
Article
Accés obertThis paper is concerned with the radiometric sensitivity computation of an aperture synthesis interferometric radiometer devoted to Earth observation. The impact of system parameters and the use of simultaneous redundant ... -
RF interference analisys in aperture synthesis interferometric radiometers: Application to L-band MIRAS instrument
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-03-31)
Article
Accés obertCurrent spaceborne radiometers do not achieve the required spatial resolution demanded by the scientific community due to antenna-size technological limitations. In recent years, several space agencies have been studying ... -
The correlation of visibility errors and its impact on the radiometric resolution of an aperture synthesis radiometer
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-09-30)
Article
Accés obertThe correlation between the visibility samples' noise of an aperture synthesis radiometer are required for the computation of the recovered temperature noise of a given pixel and of the improvement introduced by baseline ...