June 2: Measure Stability with Aperture Down/Y-Fitting Free
Configuration:
- ACS: Fully Assembled
- Mounting: ACS attached to SIFIG by GSE Lifting Points
ACS Clocked 10 deg off Vertical, Aperture Facing Floor
Note: This Configuration Frees Y-Fitting but also Precludes HRC
Heat Pipes from Transferring Heat to ASCS Plate
- Cooling: Chillers
- Optical Source: HRC Coronagraph Backlight
- Add'l Sensors: Displacement Sensors Measuring Latch Motion &
Theodolites Measuring In Plane Motion of IF Plate and Radiator Panel Relative to +P2 Enclosure Panel
- Starting Temp: Ambient at Start of Day
Results:
- Warm-up effect barely present at ~0.1 pixel
- Chillers-on Caused no Perceptible Change in Warm-up Trend
- HRC TECs Off (to Prevent Safing due to Overtemp Housing) Caused Drift Effect which is Not Related to Stability Effect
- No Measurable Motion seen by Displacement or Angular Sensors (sensitivity is .0001 inch)
calibration 
