Written 26-Jun-2024 by Kim Tolbert

The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) recorded X-ray and gamma-ray data between 3 keV and 17 MeV from the Sun between February 2012 and April 2018. Please see the RHESSI web site at https://hesperia.gsfc.nasa.gov/rhessi for a complete description of the mission, the instrument, and the software needed to analyze the data. 

Visibilities are calibrated measurements of Fourier components of the source distribution.  They represent a compact, noise-free transformation of the input imaging data, containing all the information required for image reconstruction.

These directories contain visibility FITS files for each flare in the RHESSI Image Archive with the same time bins, energy bins, and detector selection as the images in the archive.  (Visibility FITS files with finer time and energy binning are in the visibility_fits_hires_v2 directory one level up.)

Please see https://hesperia.gsfc.nasa.gov/rhessi3/data-access/rhessi-data/visibilities/ for more information on the visibility files and how to use them.