NDLI: An Internal Calibration Scheme for Polarimetric Synthetic Aperture Radar System

Content Provider	IEEE Xplore Digital Library
Author	Shuo Wang Haiming Qi Weidong Yu
Copyright Year	1980
Abstract	Two important aspects of internal calibration of polarimetric synthetic aperture radar are discussed, i.e., system gain calibration and individual transmit/receive module (TRM) calibration. System gain variation is measured, utilizing the internal calibration loop. A dual-channel TRM gain and phase calibration is carried out using orthogonal phase coding, where a signal of individual TRM is phase encoded according to a set of orthogonal codes in order to be separated from the composite calibration signal of all TRMs. Calibration results are developed both theoretically and through simulation in the case of TRM failure. Error introduced by phase-shifter toggling inaccuracy is discussed. A cross talk model is used to investigate the effect of imperfect isolation between the two polarization channels of each TRM on the calibration error.
Sponsorship	IEEE Geoscience and Remote Sensing Society IEEE URSI
Starting Page	15
Ending Page	20
Page Count	6
File Size	620968
File Format	PDF
ISSN	01962892
Volume Number	49
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calibration Polarimetric synthetic aperture radar Transmission line measurements Polarization Switches Synthetic aperture radar Extraterrestrial measurements Gain measurement Microwave radiometry Radar tracking transmit/receive module (TRM) failure phase encoding polarimetric synthetic aperture radar (SAR)
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Electrical and Electronic Engineering

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