Gain Notes for Revolution 519 JEM-X1: A quite normal revolution with fine gain fitting. All the data from this revolution should be useable. The gain smoothing is not quite as close to the gain history data as could be hoped, and this problem will be corrected in future software upgrades. However, gain correction should still be within a few percent of the ideal values. The available survey data shows that the gain correction has worked reasonably well after the initial deviations immediately after the switch on. JEM-X2: No scientific data or gain history for this unit. CAO 5/2/2007