Thursday marked the end of image quality jitter testing on SDO. For the past few days the observatory has spun reaction wheels, rotated high-gain antennas, and moved filter wheels. All this to see how each mechanism affected the staring at the Sun. All of the data must now be analyzed and our fine pointing refined to allow us to stare at the Sun.
This week also saw the isolation of the main engine. We no longer need the large thrust provided by the main engine and the pipes carrying fuel and oxidizer to it have been closed and sealed. Thanks for the lift!