TY - GEN
T1 - Clustered radio interferometric calibration
AU - Kazemi, S.
AU - Yatawatta, S.
AU - Zaroubi, S.
PY - 2011
Y1 - 2011
N2 - This paper introduces an amendment to radio interferometric calibration of sources below the noise level. The main idea is to employ the information of the stronger sources' measured signals as a plug-in criterion to solve for the weaker ones. For this purpose, we construct a number of source clusters, with centroids mainly near the strongest sources, assuming that the signals of the sources belonging to a single cluster are corrupted by almost the same errors. Due to this characteristic of clusters, each cluster is calibrated as a single source, using all the coherencies of its sources simultaneously. The obtained solutions for every cluster are assigned to all the cluster's sources. An illustrative example reveals the superiority of this calibration compared to the un-clustered calibration.
AB - This paper introduces an amendment to radio interferometric calibration of sources below the noise level. The main idea is to employ the information of the stronger sources' measured signals as a plug-in criterion to solve for the weaker ones. For this purpose, we construct a number of source clusters, with centroids mainly near the strongest sources, assuming that the signals of the sources belonging to a single cluster are corrupted by almost the same errors. Due to this characteristic of clusters, each cluster is calibrated as a single source, using all the coherencies of its sources simultaneously. The obtained solutions for every cluster are assigned to all the cluster's sources. An illustrative example reveals the superiority of this calibration compared to the un-clustered calibration.
KW - Calibration
KW - Clustering algorithms
KW - Clustering methods
KW - Interferometry: Radio interferometry
UR - http://www.scopus.com/inward/record.url?scp=80052186981&partnerID=8YFLogxK
U2 - 10.1109/SSP.2011.5967769
DO - 10.1109/SSP.2011.5967769
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AN - SCOPUS:80052186981
SN - 9781457705700
T3 - IEEE Workshop on Statistical Signal Processing Proceedings
SP - 597
EP - 600
BT - 2011 IEEE Statistical Signal Processing Workshop, SSP 2011
T2 - 2011 IEEE Statistical Signal Processing Workshop, SSP 2011
Y2 - 28 June 2011 through 30 June 2011
ER -