When you see the Sun zipping through the SDO movies you know its time for a calibration maneuver. Last Wednesday we did an EVE cruciform, nodding SDO up, down, back, and forth to allow EVE to look at how the instrument is behaving. The blurry frame on at left is an example of what happens when you take an AIA 171 image during one of the moves. This Wednesday we will do an EVE field of view and HMI/AIA flatfield. Although we can't maintain our 24/7 observing schedule during these maneuvers, they allow us to keep the instruments in excellent shape.
