Results 31 to 40 of about 16,272 (256)
Imaging ionospheric inhomogeneities using spaceborne synthetic aperture radar [PDF]
, 2011 We present a technique and results of 2-D imaging of Faraday rotation and total electron content using spaceborne L band polarimetric synthetic aperture radar (PolSAR).
Chapman, B. +4 more
core +2 more sources
Skyless polarimetric calibration and visibility enhancement
Optics Express, 2009 Outdoor imaging in haze is plagued by poor visibility. A major problem is spatially-varying reduction of contrast by airlight, which is scattered by the haze particles towards the camera. However, images can be compensated for haze, and even yield a depth map of the scene. A key step in such scene recovery is subtraction of the airlight. In particular,
Einav, Namer +2 more
openaire +2 more sources
Leida xuebao, 2016 Conventional distributed-target-based polarimetric calibration algorithms estimate polarimetric distortions by assuming that the measured spatially averaged covariance matrix takes a specific form.
Zhang Jingjing, Hong Wen, Yin Qiang
doaj +1 more source
High-Sensitivity 86GHz (3.5mm) VLBI Observations of M87: Deep Imaging of the Jet Base at a 10 Schwarzschild-Radius Resolution [PDF]
, 2015 We report on results from new high-sensitivity, high-resolution 86GHz (3.5 millimeter) observations of the jet base in the nearby radio galaxy M87, obtained by the Very Long Baseline Array in conjunction with the Green Bank Telescope. The resulting image
Akiyama, Kazunori +11 more
core +2 more sources
Development of a Polarimetric 50-GHz Spectrometer for Temperature Sounding in the Middle Atmosphere
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 This article addresses the further development of the ground-based temperature radiometer TEMPERA, which measures atmospheric microwave radiation in one linear polarization in order to retrieve temperature profiles up to an altitude of 50 km (Stä ...
Witali Krochin, Gunter Stober, Axel Murk
doaj +1 more source
Achromatizing a liquid-crystal spectropolarimeter: Retardance vs Stokes-based calibration of HiVIS
, 2010 Astronomical spectropolarimeters can be subject to many sources of systematic error which limit the precision and accuracy of the instrument. We present a calibration method for observing high-resolution polarized spectra using chromatic liquid-crystal ...
C. Sennhauser +13 more
core +1 more source
Error Source Analysis and Correction of GF-3 Polarimetric Data
Remote Sensing, 2018 The GaoFen-3 (GF-3) satellite is the first polarimetric synthetic aperture radar (PolSAR) satellite in China. With a designed in-orbit life of 8 years, it will provide large amounts of PolSAR data for ocean monitoring, disaster reduction, and many other ...
Sha Jiang +4 more
doaj +1 more source
Airborne polarimetric Doppler weather radar: trade-offs between various engineering specifications [PDF]
Geoscientific Instrumentation, Methods and Data Systems, 2018 NCAR EOL is investigating potential configurations for the next-generation airborne phased array radar (APAR) that is capable of retrieving dynamic and microphysical characteristics of clouds and precipitation. The APAR will operate at C band.
J. Vivekanandan, E. Loew
doaj +1 more source
POLARIMETRIC CALIBRATION OF L-BAND AIRBORNE SAR DATA [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020 The PolSAR calibration ensures that the relationship between the SAR observations and the target characteristics on the ground are consistent and resembles the theoretical estimation which in turn improves the overall data quality.
A. Maiti +3 more
doaj +1 more source
Removal of Spectro-Polarimetric Fringes by 2D Pattern Recognition
, 2012 We present a pattern-recognition based approach to the problem of removal of polarized fringes from spectro-polarimetric data. We demonstrate that 2D Principal Component Analysis can be trained on a given spectro-polarimetric map in order to identify and
Casini +17 more
core +1 more source