June 3: Measure Stability with Radiator Panel Unbolted
Configuration:
- ACS: +P2 Radiator Panel Bolts Loosened 1 Turn
- Mounting: In Dolly, in Square with Radiator Facing Up & Parallel to Floor
- Cooling: Chillers
- Optical Source: HRC Coronagraph Backlight
- Starting Temp: Ambient at Start of Day
Results:
- Warm-up Effect of 1 pixel seen
- Chillers-On & Off had No Effect
- HRC Set Point Change from -90C to -67C Caused Noticeable Slope Change
- New "Rolling" Effect in X-Axis only Started without Apparent Cause
~7 Hours Into Test and Continued through Remaining 8 Hours
- Also Noticed an Unexplained Increase in Noise in Spot Location Data as Test Progressed
- There was No Corresponding Increase in Image Noise
calibration 
