In this work, we report on the search for correlation between Terrestrial Gamma-ray Flashes (TGFs) observed by the Telescope Array Surface Detector (TASD) and TGFs observed by the Atmosphere-Space Interactions Monitor (ASIM). Such correlation could in principle allow us to constrain the models responsible for the initiation and propagation of TGFs.
The TASD is a ~700 square kilometer cosmic ray observatory located in the south-west Utah desert at 1400 meters above sea level. The array is comprised of 507 scintillator detectors spaced 1.2 kilometers apart.
The Atmosphere-Space Interactions Monitor (ASIM) was launched in the International Space Station on April 2nd, 2018. The hosted payload of ASIM has a Modular X-ray and Gamma-ray Sensor (MXGS) for imaging and spectral analysis of TGFs, and the Modular Multi-spectral Imaging Array for detection, imaging, and spectral analysis of Transient Luminous Events (TLEs) and lightning.
The results from this work showed there were no correlations between observations by the ASIM and the TASD detectors.