NDLI: Radio Interferomietric Calibration Using Te SAGE Algorithm

Content Provider	IEEE Xplore Digital Library
Author	Yatawatta, S. Zaroubi, S. de Bruyn, G. Koopmans, L. Noordam, J.
Copyright Year	2009
Description	Author affiliation: Kapteyn Astronomnical Institute, University of Groningen, Groningen, The Netherlands (Zaroubi, S.; Koopmans, L.) \|\| ASTRON, Dwingeloo, The Netherlands (Noordam, J.) \|\| Kapteyn Astronomnical Institute, University of Groningen, Groningen, The Netherlands ASTRON, Dwingeloo, The Netherlands yatawatta@astron.nl (Yatawatta, S.) \|\| Kapteyn Astronomnical Institute, University of Groningen, Groningen, The Netherlands ASTRON, Dwingeloo, The Netherlands (de Bruyn, G.)
Abstract	Radio Interferometry is an essential method for astronomical observations. Self-calibration techniques have increased the quality of the radio astronomical observations (and hence the science) by orders of magnitude. Recently, there is a drive towards sensor arrays built using inexpensive hardware and distributed over a wide area acting as radio interferometers. Calibration of such arrays poses new problems in terms of computational cost as well as in performance of existing calibration algorithms. We consider the application of the Space Alternating Generalized Expectation Maximization (SAGE) [1] algorithm for calibration of radio interferometric arrays. Application to real data shows that this is an improvement over existing calibration algorithms that are based on direct, deterministic non linear optimization. As presented in this paper, we can improve the computational cost as well as the quality of the calibration using this algorithm.
Starting Page	150
Ending Page	155
File Size	6415107
Page Count	6
File Format	PDF
ISBN	9781424436774
DOI	10.1109/DSP.2009.4785912
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-01-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calibration Tellurium Signal processing algorithms Sensor arrays Computational efficiency Iterative algorithms Radio interferometry Maximum likelihood estimation Instruments Drives
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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