Thermal control scheme was changed from constant duty cycle to thermistor-controlled, resulting in more stable thermal control.
The image crop radius was increased for limb flare observations. Some statistics keywords are affected.
The original observing scheme took circularly polarized filtergrams on the front camera (camera 2) for LOS observables computation, and all polarization states on the side camera (camera 1) for the vector magnetic field observations. After this date, the front camera and LOS observables computation is unchanged, but only linearly polarized filtergrams are taken on the side camera and the vector magnetic field products combine data from both cameras.