NDLI: Synthetic Aperture Technic in Astronomy Using Slit Aperture Telescope

Content Provider	Springer Nature Link
Author	Touma, H.
Copyright Year	1997
Abstract	The interest in a Rotating Slit-Aperture Telescope (RSAT) among other synthetic aperture telescopes is its capability of being easily coupled with a spectrograph, in order to give reconstructed images of an astronomical object as a function of the light wavelength. Each colored image is comparable with the others for fruitful astrophysical applications. The principle of image reconstruction is well known: it consists of the inversion of the set of projections (Radon transform) given by the telescope during its rotation around its optical axis. A full coverage of the two dimensional Fourier plane can be obtained by rotating the SAT. This problem has led to intense developments for medical imaging (tomography). One of the main difficulties in the reconstruction process in space may come from the jitter of the rotation axis of the RSAT. A set of projections uncorrected for this jitter produces very fuzzy reconstructed images. An elegant solution to the necessary phasing between successive projections is proposed which makes use of a small auxilliary telescope, and some numerical simulations are presented.
Starting Page	47
Ending Page	53
Page Count	7
File Format	PDF
ISSN	0004640X
Journal	Astrophysics and Space Science
Volume Number	258
Issue Number	1-2
e-ISSN	1572946X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Astronomy
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics 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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