NDLI: Prototyping a New Earth Observing Sensor

Content Provider	IEEE Xplore Digital Library
Author	Lambrigtsen, B. Tanner, A. Gaier, T. Kangaslahti, P. Brown, S.
Copyright Year	2007
Description	Author affiliation: California Inst. of Technol., Pasadena (Lambrigtsen, B.; Tanner, A.; Gaier, T.; Kangaslahti, P.; Brown, S.)
Abstract	The Geostationary Synthetic Thinned Aperture Radiometer (GeoSTAR) was conceived to fill a gap in our Earth remote sensing capabilities -the lack of a microwave atmospheric sounder in geostationary orbit. This capability is highly desired because of the advantageous observing point GEO offers, with continuous views of the entire visible Earth disc -crucial for observation of hurricanes and other rapidly evolving atmospheric phenomena. The GeoSTAR concept is a radical departure from the conventional way of constructing a microwave sounding radiometer, which typically uses a scanning parabolic reflector that focuses a narrow receiving "beam" into a single receiver. Instead, the STAR approach is to use a 2-D array of a large number of receivers to synthesize a large aperture and operate the system as a spatial interferometer that images the scene in two dimensions without requiring scanning. Such systems have been investigated before, and the European Space Agency is developing a soil moisture satellite mission based on this concept, but none had been adequately demonstrated either on the ground or in space. This is a perfect case for a prototyping effort. An effort has been under way at the Jet Propulsion Laboratory for the last 3-4 years to build a GeoSTAR prototype and demonstrate that the 2-D STAR approach works. The prototype, which is a moderate-aperture implementation of a fully functional temperature sounder, was completed in early 2005 and has since undergone a number of tests. This prototyping effort, which involved both technology and system development as well as development of new testing methodologies, has been very successful. The GeoSTAR concept, even though it has not been tested in a space environment and therefore is not formally at TRL 6 (i.e. per NASA's definition), is now ready to be considered for space mission opportunities. A companion effort to assess the expected impact on weather forecast accuracy through a so-called Observational System Simulation Experiment (OSSE) is also under way. Together, the prototyping and the OSSE constitute crucial steps on the road to a space mission.
Starting Page	1
Ending Page	9
File Size	2046845
Page Count	9
File Format	PDF
ISBN	1424405246
ISSN	1095323X
DOI	10.1109/AERO.2007.352690
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-03-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Prototypes Earth Space missions Microwave radiometry Space technology Weather forecasting Acoustic sensors Remote sensing Hurricanes Focusing
Content Type	Text
Resource Type	Article
Subject	Aerospace Engineering Space and Planetary Science

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

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