NDLI: A space-based 90 GHz radiometer for the observation of solar flares: Feasibility study

Content Provider	IEEE Xplore Digital Library
Author	Alimenti, F. Palazzari, V. Battistini, A. Roselli, L. White, S.M. Velli, M. Bigazzi, A. Berrilli, F.
Copyright Year	2009
Description	Author affiliation: Dept. of Astronomy, University of Maryland, College Park, MD-20742, USA (White, S.M.) \|\| Dept. of Electronic and Information Engineering, University of Perugia, via G. Duranti 93, I-06125 Perugia, Italy (Alimenti, F.; Palazzari, V.; Battistini, A.; Roselli, L.) \|\| Dept. of Astronomy, University of Florence, largo E. Fermi 2, I-50125 Firenze, Italy (Velli, M.) \|\| Dept. of Physics, University of Rome ¿Tor Vergata¿, viale della Ricerca Scientifica 1, I-00133 Roma, Italy (Bigazzi, A.; Berrilli, F.)
Abstract	Millimeter-wave observations of the Sun have never been carried out from a space-based platform. This work presents a feasibility study for a full-disk 90 GHz radiometer designed to detect the radio emission of solar flares. Such a feasibility study has been carried-out in the frame of the ADAHELI (ADvanced Astronomy for HELIophysics) mission, whose phase A has been funded by the Italian Space Agency (ASI) and successfully completed in December 2008. First flare radiation mechanisms are introduced, showing that millimeter-waves are very sensitive probe of the highest energy electrons accelerated in solar flares. Then the fluctuation of the Sun to satellite radio path attenuation is studied by modeling the ionosphere as a charged plasma. Finally the science requirements and the system design are presented. The instrument architecture is based on a 25 cm dish antenna with f/D = 0.6 and a 45 deg offset of the feed. The receiver uses a direct amplification configuration with 8 dB noise figure, 50 dB gain and 100 ppm gain stability. The target of 3 sfu radiometric resolution for a 1 s integration time is achieved with a 2GHz pre-detection bandwidth.
Starting Page	982
Ending Page	985
File Size	327556
Page Count	4
File Format	PDF
ISBN	9781424447480
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-29
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	EUMA
Subject Keyword	Radiometry Sun Astronomy Space missions Probes Electrons Acceleration Fluctuations Satellite broadcasting Attenuation microwave radiometry solar flares
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

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