The Fermi Large Area Telescope: 9 years of on-orbit performance
2017 December 12
The $Fermi$ Large Area Telescope (LAT) has been successfully operating in low Earth orbit almost continuously since its initial turn-on on 24 June 2008, for over 9 years. We present details of the current performance of the LAT detector and data acquisition sub-systems, together with long-term trends of key performance measures, and assess the expected performance in continued future operation. We also discuss the current and future status of the ground-based control, monitoring and data processing for the LAT.