Feed rotation corrections for antennas having beam waveguide mounts
Richard Dodson, Maria J. Rioja
TL;DR
This paper introduces new software for beam waveguide antenna mounts in VLBI, enabling polarization analysis by correcting differential phase effects specific to these antenna types.
Contribution
Development of code supporting beam waveguide mounts in AIPS, allowing accurate polarization analysis for antennas like Warkworth and Yamaguchi.
Findings
Corrections successfully applied to Warkworth antenna data.
Enhanced polarization analysis capabilities for beam waveguide antennas.
Improved accuracy in differential phase measurements.
Abstract
We report on the development of new code to support the beam waveguide antenna mount types in AIPS, which will allow polarisation analysis of observations made using these antennas. Beam Wave-guide antennas in VLBI are common in communication antennas that have been repurposed (e.g. Warkworth, Yamaguchi). The mount type affects the differential phase between the left and the right hand circular polarisations (LHC and RHC) for different points on the sky. We demonstrate that the corrections for the Warkworth beam wave guide antenna can be applied.
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Taxonomy
TopicsParticle Accelerators and Free-Electron Lasers · Radio Astronomy Observations and Technology · Particle accelerators and beam dynamics