Fermi Gamma-ray Space Telescope

Observatory Status

Fermi Observations for MW 636

Mission Week 636 starts with a short continuation of the symmetric +-50 degree rocking profile from the previous mission week. On DOY 219 (Aug 6) at 00:30 UT there is a 10 minute freeze observation during which an updated rocking profile is loaded. The updated profile is used for the remainder of the mission week. Two inertial pointings are scheduled for DOY 223 (Aug 10) at 15:28 UT and 18:38 UT to facilitate Star Tracker CCD dumps. An additional inertial pointing is scheduled for DOY 224 (Aug 11) at 16:51. Note that positive rock angles are south, and negative angles are north.

» More Timeline Info

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 more details on the instrument hardware, see the home pages of the GBM, the LAT, and the ACD.

For the results of LAT and GBM observations, see:

More information on Fermi Observations: