Fermi Observations for MW 681
Mission week 681 starts with a continuation of the modified sine rocking profile from the previous week. On day of year 168 (2021-06-17 ) at 01:30 there is a 10 minute freeze observation during which an updated modified sine profile is loaded. This profile continues until DOY 173 (2021-06-22) at 20:11 when there is a 10 minute freeze observation during which an asymmetric +50/-60 deg. profile is loaded. This profile continues until the end of the week. Note that positive rock angles are south, and negative angles are north.
The Fermi Gamma-ray Space Telescope was launched from Kennedy Space Center on June 11, 2008. The observatory checkout phase completed on August 11, 2008, and Fermi is now in nominal science operations. The current status (and beautiful graphics) can be found at www.nasa.gov/fermi.
The Fermi spacecraft supports two gamma-ray instruments; the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). The LAT is a wide-field gamma-ray telescope (20 MeV - 300 GeV). From the start of regular observations in August 2008 until December 2013 the LAT continuously scanned the sky, providing all-sky coverage every two orbits. Since a spacecraft anomaly that occurred during March 2018 the observatory has been operated in sky-survey mode employing alternative strategies. Details are described here.
For the results of LAT and GBM observations, see: