NDLI: SMOS radiometric performance evaluation using SEPS: evaluation of thermal drifts

Content Provider	IEEE Xplore Digital Library
Author	Camps, A. Zapata, M. Corbella, I. Torres, F. Vall-llossera, M. Duffo, N. Barrena, V. Garcia, C. Martin, F.
Copyright Year	2004
Description	Author affiliation: Dept. de Signal Theor. & Commun., Univ. Politecnica de Catalunya, Barcelona (Camps, A.; Zapata, M.; Corbella, I.; Torres, F.; Vall-llossera, M.; Duffo, N.)
Abstract	The SMOS (Soil Moisture and Ocean Salinity) Mission was selected in May 1999 by the European Space Agency to provide global and frequent soil moisture and sea surface salinity maps. SMOS single payload is MIRAS (Microwave Imaging Radiometer by Aperture Synthesis), an L-band 2D aperture synthesis interferometric radiometer with multi-angular observation capabilities and dual-polarization and full-polarimetric capabilities. The impact of thermal drifts in the SMOS rms radiometric accuracy during a complete orbit is evaluated by means of the SMOS End-to-end Performance Simulator (SEPS) [1,2,3] for three different cases of interest: the so-called "cold", "hot", and "LAP" (Low Available Power) cases, that correspond to the extreme thermal conditions in a year, and the case where there is not enough power to keep the thermal control. Errors originated by receivers' frequency response mismatch, and their thermal drifts are included, while antenna voltage patterns errors are assumed to be the same, and not temperature-dependent. Current error correction and image reconstruction algorithms are applied to obtain the synthetic brightness temperatures. To avoid scene-dependent effects on the rms radiometric accuracy drifts, it is computed using a 150 K constant brightness temperature in the directions occupied by the Earth, and external sources such as the Sun, the Moon and the sky (cosmic and galactic) radiations are not modeled by switching them off in SEPS. The inter-calibration period is estimated according to the maximum error drift that can be accepted in the different cases
Starting Page	4508
Ending Page	4511
File Size	559010
Page Count	4
File Format	PDF
ISBN	0780387422
DOI	10.1109/IGARSS.2004.1370155
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microwave radiometry Brightness temperature SMOS mission Space missions Soil moisture Sea surface salinity Payloads Microwave imaging L-band Radio control
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