Solar Microwave Imaging Software for the Owens Vally Solar Array

Details Solar Microwave Imaging Software for the Owens Vally Solar Array Solar Microwave Imaging Software for the Owens Vally Solar Array

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh41b18g&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SH41B-18

Astronomy and Astrophysics

Astronomy

6924 Interferometry, 6954 Radio Astronomy, 6994 Instruments And Techniques

Scientific paper

A package of solar microwave imaging software has been developed mainly to support general users of microwave data obtained with the Owens Valley Solar Array (OVSA). While the Astronomical Image Processing System (AIPS) maintained by NRAO is widely used for radio interferometry data and can be used for the OVSA data as well, we consider it worthwhile to have new imaging software optimized for OVSA data, especially for accommodating the large number of frequencies in the OVSA data. Another motivation, in collaboration with the High Energy Solar Spectroscopic Imager (HESSI--which uses Fourier-Transform imaging at energies of hard X rays), is to make the OVSA imaging software conform to the HESSI software. The OVSA imaging software is written in IDL, and conforms to the Solarsoft software tree while maintaining radio standards. With typical input parameters set by the user, the imaging software carries out the standard Clean algorithm and then prompts for further processing options. These include Self-Calibration, Maximum Entropy, and Forward-Fitting algorithms. We describe the software and demonstrate the capabilities of each algorithm when applied to solar microwave imaging with OVSA. We also describe progress on an improved version of the Spatial/Spectral Maximum Entropy Method and test it against the above-mentioned, more conventional techniques.

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