要旨
The EUSO-TA project has involved the installation and operation of a ground based telescope which employs the EUSO technology (optics and electronics). The aim is to observe UHECR (Ultra-High Energy Cosmic Rays) together with the Telescope Array Fluorescence detector located in black rock mesa, Utah. Over the year, several events have been detected using TA trigger and the system was greatly improved thanks to the knowledge gained with these observations. In 2016 a joint observation with the EUSO-SPB (Super Pressure Balloon) payload integrated in the flight gondola. In 2017 the work to upgrade the focal surface with some improved electronics. The work will be completed in 2018