An approach for solving rank-deficient systems that enable atmospheric path delay and water vapor content estimation

Saqellari-Likoka, A; Karathanassi, V

dc.contributor.author	Saqellari-Likoka, A	en
dc.contributor.author	Karathanassi, V	en
dc.date.accessioned	2014-03-01T02:45:06Z
dc.date.available	2014-03-01T02:45:06Z
dc.date.issued	2008	en
dc.identifier.issn	0196-2892	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32148
dc.subject	Atmospheric measurements	en
dc.subject	Interferometry	en
dc.subject	Singular value decomposition	en
dc.subject	Synthetic aperture radar (SAR)	en
dc.subject.classification	Geochemistry & Geophysics	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Remote Sensing	en
dc.subject.other	Atmospherics	en
dc.subject.other	Errors	en
dc.subject.other	Geodetic satellites	en
dc.subject.other	Geomorphology	en
dc.subject.other	Hydraulic models	en
dc.subject.other	Image enhancement	en
dc.subject.other	Imaging systems	en
dc.subject.other	Problem solving	en
dc.subject.other	Radar	en
dc.subject.other	Signal filtering and prediction	en
dc.subject.other	Synthetic aperture radar	en
dc.subject.other	Synthetic apertures	en
dc.subject.other	Target drones	en
dc.subject.other	Vapors	en
dc.subject.other	Water content	en
dc.subject.other	Water vapor	en
dc.subject.other	Atmospheric measurements	en
dc.subject.other	Interferometry	en
dc.subject.other	Singular value decomposition	en
dc.subject.other	Synthetic aperture radar (SAR)	en
dc.subject.other	Mathematical techniques	en
dc.title	An approach for solving rank-deficient systems that enable atmospheric path delay and water vapor content estimation	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/TGRS.2008.921744	en
heal.identifier.secondary	http://dx.doi.org/10.1109/TGRS.2008.921744	en
heal.identifier.secondary	4637973	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	This paper develops mathematical techniques and makes use of interferometric synthetic aperture radar (InSAR) for improving the quality of digital elevation models derived from SAR images and providing accurate estimations of atmospheric path and absolute phase delays and water vapor content estimation. The problem of solving parameters such as atmospheric path delay, height, and unwrapping errors is to be described in a mathematical form that uses QR factorization techniques for solving rank-deficient systems. A new approach for the solution of rank-deficient systems with few independent equations is proposed. In the new approach, the bounds are considered known and provided by the eigenvalues. New eigenvalues are added inside the bounds. During the implementation, attention is given not to exceed the bounds of the reorganized matrix. This approach is the first time that is used for phase parameterization in terms of height, tropospheric delay, and phase unwrapping errors. Expanding the approach was also studied for absolute phase delay and water vapor content estimation. The investigation and the implementation of the approach make use of ENVISAT images. The validation of results was implemented through GPS and meteorological measurements. © 2008 IEEE.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Transactions on Geoscience and Remote Sensing	en
dc.identifier.doi	10.1109/TGRS.2008.921744	en
dc.identifier.isi	ISI:000260000400013	en
dc.identifier.volume	46	en
dc.identifier.issue	10	en
dc.identifier.spage	3187	en
dc.identifier.epage	3195	en