NDLI: Atmospheric retrievals using regularization methods

Content Provider	IEEE Xplore Digital Library
Author	Velez-Reyes, M.
Copyright Year	1998
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Puerto Rico Univ., Mayaguez, Puerto Rico (Velez-Reyes, M.)
Abstract	A radiometer measures microwave emissions from the atmosphere and surface. The radiance measured by the radiometer is proportional to the brightness temperature. This brightness temperature can be used to estimate atmospheric parameters such as temperature and water vapor content. Depending on the range in the electromagnetic spectrum being measured by the radiometer and the atmospheric quantities to be estimated, the retrieval or inverse problem of determining atmospheric parameters from brightness temperature might be linear or nonlinear. A difficulty associated with the retrieval problem is that they are under constrained because there are only few brightness temperatures being measured by the sensor while the quantities of interest are estimated at a higher vertical resolution (more unknowns). To further constrain the problem, prior information is incorporated into the problem to convert the ill-posed problem into a well-posed one. The author presents the results of work in applying different regularization techniques to the discrete problem associated with temperature retrieves using brightness temperatures from the SSM/T-1 sensor. Simulation results are presented which show the potential of these techniques to improve the performance of retrieval. In particular, no statistical assumptions are needed and the algorithms were capable of correctly estimating the temperature profile corner at the tropopause independent of the initial guess.
Starting Page	1403
Ending Page	1407
File Size	438967
Page Count	5
File Format	PDF
ISBN	0780344030
DOI	10.1109/IGARSS.1998.691454
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-07-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Brightness temperature Atmospheric measurements Temperature sensors Microwave radiometry Electromagnetic measurements Microwave measurements Atmosphere Parameter estimation Electromagnetic spectrum Inverse problems
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in