Results 171 to 180 of about 489,746 (209)
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Calibration of bistatic polarimetric radar systems
IEEE Transactions on Geoscience and Remote Sensing, 1992A calibration technique for laboratory type polarimetric, bistatic instrumentation radars is presented. It describes the errors induced by the standard radiation transfer approach (I-SRT) in a way similar to that for the monostatic case. A 12-term error correction and absolute polarimetric calibration is performed with two external reference targets ...
Kaehny, Daniel +2 more
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Study of calibration of windsat polarimetric sensor
Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05., 2005Abstract : A new methodology is developed to monitor and calibrate the Windsat 3rd and 4th Stokes parameters through tropical rainforest measurements over Amazon and the central Africa. It is found that the Windsat 4th Stokes parameter at 18 GHz has biases on an order of 0.5 Kelvin, which could severely impact the wind vector retrievals.
Quanhua (Mark) Liu, Fuzhong Weng
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Comparison of polarimetric calibration techniques and their applications
2010 IEEE International Geoscience and Remote Sensing Symposium, 2010Crosstalk calibration is an important part of polarimetric calibration, and the Quegan algorithm and Ainsworth algorithm are classic algorithms to reduce crosstalk. This paper gives analysis and comparison of these algorithms for quad polarized data with low crosstalk and high crosstalk, respectively. The PolSAR data used in experiments are acquired by
Wuping Lu +4 more
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Analysis and improvement of polarimetric calibration techniques
2007 IEEE International Geoscience and Remote Sensing Symposium, 2007This work presents an analytical study of the Quegan's PolSAR data calibration algorithm. As it shall be demonstrated, the solution proposed by Quegan based on certain approximations, gives in certain situations, biased crosstalk ratios u, v, w and z. An improved Quegan's calibration algorithm is proposed and tested.
Carlos López-Martínez +2 more
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Fully polarimetric calibration system for HUT polarimetric radiometer
IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2002The fully polarimetric calibration system for HUT polarimetric radiometer is described. The system generates adjustable reference brightness temperatures for all four Stokes parameters. The available calibration time varies from 10 to 20 minutes depending on the desired accuracy.
J. Lahtinen, M. Hallikainen
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Polarimetric system calibration in the presence of Faraday rotation
2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017A methodology that allows the separation of Faraday Rotation (FR) distortion from system induced distortion for the calibration of spaceborne polarimetric data is proposed. The separation is based on the frequency dependency of the FR across the system bandwidth and relies on the commonly used assumption that system distortions are frequency ...
Papathanassiou, Konstantinos +1 more
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Phase Calibration Of Polarimetric SAR
International Geoscience and Remote Sensing Symposium, 'Remote Sensing: Moving Toward the 21st Century'., 2005Techniques were developed to measure the phase characteristics of a polarimetric imaging synthetic aperture radar (SAR). portion of the radar signature from an airborne, polarimetric SAR system, targets (dihedral and trihedral corner reflectors) with known characteristics were deployed, and several passes of polarimetric data collected.
D.R. Sheen +2 more
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Polarimetric calibration for RADARSAT-2
IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2002The RADARSAT-2 SAR currently under development will be required to operate in many modes, including a fully polarimetric mode with at least 30 beams. An efficient means for achieving and maintaining polarimetric calibration of these beams is needed, and the paper describes the work that has been performed to define and validate a method based on ...
A.P. Luscombe, K. Chotoo, B.D. Huxtable
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Calibration of bistatic polarimetric scatterometers
IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium, 2002The recent interest in bistatic and multistatic radar has led to a need for information concerning the bistatic reflectivity of clutter viewed by such systems. Unfortunately, little information is available describing calibration for a bistatic radar system. This paper presents a new calibration technique for bistatic scatterometers.
F. Daout, A. Khenchaf, J. Saillard
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Polarimetric UHF Calibration for SETHI
PIERS Online, 2010The SETHI sensor from ONERA is an airborne radar equipped with difierent bands (UHF-VHF, L, X) on a Falcon 20. The UHF-VHF band is fully polarimetric and can operate between 225MHz up to 460MHz. In August 2009, this system was used in French Guiana for the TROPISAR experiment. Data were acquired from 0 - incidence angle up to 65 - incidence angle and a
Helene Oriot +2 more
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