Monday, October 12, 2015

Another Lunar Transit Today

SDO will see another lunar transit today from 1718 UTC (1:18 p.m. ET) until 1733 UTC (1:33 p.m. ET). Although this is a very short transit, the Moon will occult part of the fine guidance system in AIA so we will turn off the fine guidance during the transit. That means the AIA images will drift a little and the HMI Dopplergrams and magnetograms will not be created.