New methods for ALMA angular-scale-based observation scheduling, quality assessment, and beam shaping II:  refinements

Dirk Petry; María Díaz Trigo; Rüdiger Kneissl; Ignacio Toledo; Atsushi Miyazaki; Toshinobu Takagi; Ashley Barnes; Francesca Bonanomi

doi:10.1117/12.3012662

25 July 2024 New methods for ALMA angular-scale-based observation scheduling, quality assessment, and beam shaping II: refinements

Dirk Petry, María Díaz Trigo, Rüdiger Kneissl, Ignacio Toledo, Atsushi Miyazaki, Toshinobu Takagi, Ashley Barnes, Francesca Bonanomi

Author Affiliations +

Proceedings Volume 13098, Observatory Operations: Strategies, Processes, and Systems X; 130980P (2024) https://doi.org/10.1117/12.3012662
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

The Atacama Large Millimeter/submillimeter Array remains the largest mm radio interferometer observatory world-wide. It is now conducting its 11th observing cycle. In our previous paper presented at this conference series in 2020, we outlined a number of possible improvements to the ALMA end-to-end observing and data processing procedures which could further optimize the uv coverage and thus the image quality while at the same time improving the observing efficiency. Here we report an update of our results refining our proposed adjustments to the scheduling and quality assurance processes. In particular we present new results on ways to assess the uv coverage of a given observation efficiently, methods to define and measure the maximum recoverable angular scale, and on the robustness of the deconvolution in the final interferometric imaging process w.r.t. defects in the uv coverage. Finally, we present the outline of a design for integrating uv coverage assessment into the control and processing loop of observation scheduling. The results are applicable to all radio interferometers with more than approx. ten antennas.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Dirk Petry, María Díaz Trigo, Rüdiger Kneissl, Ignacio Toledo, Atsushi Miyazaki, Toshinobu Takagi, Ashley Barnes, and Francesca Bonanomi "New methods for ALMA angular-scale-based observation scheduling, quality assessment, and beam shaping II: refinements", Proc. SPIE 13098, Observatory Operations: Strategies, Processes, and Systems X, 130980P (25 July 2024); https://doi.org/10.1117/12.3012662

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