English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a new technique for calibrating the primary beam of a wide-field,drift-scanning antenna element. Drift-scan observing is not compatible withstandard beam calibration routines, and the situation is further complicated bydifficult-to-parametrize beam shapes and, at low frequencies, the sparsity ofaccurate source spectra to use as calibrators. We overcome these challenges bybuilding up an interrelated network of source "crossing points" -- locationswhere the primary beam is sampled by multiple sources. Using the singleassumption that a beam has 180 degree rotational symmetry, we can achievesignificant beam coverage with only a few tens of sources. The resultingnetwork of crossing points allows us to solve for both a beam model and sourceflux densities referenced to a single calibrator source, circumventing the needfor a large sample of well-characterized calibrators. We illustrate the methodwith actual and simulated observations from the Precision Array for Probing theEpoch of Reionization (PAPER).

A Technique for Primary Beam Calibration of Drift-Scanning, Wide-Field Antenna Elements