A technique for primary beam calibration of drift-scanning, wide-field antenna elements

Jonathan C. Pober, Aaron R. Parsons, Daniel Jacobs, James E. Aguirre, Richard F. Bradley, Chris L. Carilli, Nicole E. Gugliucci, David F. Moore, Chaitali R. Parashare

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We present a new technique for calibrating the primary beam of a wide-field, drift-scanning antenna element. Drift-scan observing is not compatible with standard beam calibration routines, and the situation is further complicated by difficult-to-parameterize beam shapes and, at low frequencies, the sparsity of accurate source spectra to use as calibrators. We overcome these challenges by building up an interrelated network of source "crossing points" - locations where the primary beam is sampled by multiple sources. Using the single assumption that a beam has 180°rotational symmetry, we can achieve significant beam coverage with only a few tens of sources. The resulting network of crossing points allows us to solve for both a beam model and source flux densities referenced to a single calibrator source, circumventing the need for a large sample of well-characterized calibrators. We illustrate the method with actual and simulated observations from the Precision Array for Probing the Epoch of Reionization.

Original languageEnglish (US)
Article number53
JournalAstronomical Journal
Volume143
Issue number2
DOIs
StatePublished - Feb 1 2012

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antenna radiation patterns
symmetry
antenna
calibration
scanning
calibrating
method
need
antennas
flux density
time measurement
low frequencies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Pober, J. C., Parsons, A. R., Jacobs, D., Aguirre, J. E., Bradley, R. F., Carilli, C. L., ... Parashare, C. R. (2012). A technique for primary beam calibration of drift-scanning, wide-field antenna elements. Astronomical Journal, 143(2), [53]. https://doi.org/10.1088/0004-6256/143/2/53

A technique for primary beam calibration of drift-scanning, wide-field antenna elements. / Pober, Jonathan C.; Parsons, Aaron R.; Jacobs, Daniel; Aguirre, James E.; Bradley, Richard F.; Carilli, Chris L.; Gugliucci, Nicole E.; Moore, David F.; Parashare, Chaitali R.

In: Astronomical Journal, Vol. 143, No. 2, 53, 01.02.2012.

Research output: Contribution to journalArticle

Pober, JC, Parsons, AR, Jacobs, D, Aguirre, JE, Bradley, RF, Carilli, CL, Gugliucci, NE, Moore, DF & Parashare, CR 2012, 'A technique for primary beam calibration of drift-scanning, wide-field antenna elements', Astronomical Journal, vol. 143, no. 2, 53. https://doi.org/10.1088/0004-6256/143/2/53
Pober, Jonathan C. ; Parsons, Aaron R. ; Jacobs, Daniel ; Aguirre, James E. ; Bradley, Richard F. ; Carilli, Chris L. ; Gugliucci, Nicole E. ; Moore, David F. ; Parashare, Chaitali R. / A technique for primary beam calibration of drift-scanning, wide-field antenna elements. In: Astronomical Journal. 2012 ; Vol. 143, No. 2.
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