SDO Day 62: Still Testing After All These Weeks
04.13.10
 
SDO has continued instrument calibration for the past few days. These included an EVE cruciform and guide telescope monthly calibration. During the cruciform scan, SDO left inertial mode (an attitude-control mode) and went into sun-acquisition mode. This was traced to a wrong number in a filter that slowly pushed the spacecraft in the wrong direction until an automated response caused SDO to enter sun-acquisition mode. The number was fixed and the GT calibration was run.

The EVE cruciform and HMI flat field maneuvers will run Wednesday.