The remainder of the December time has been clobbered by two storms moving through the state. The first one passed through Saturday. By Sunday evening we could open. We phased the interferometer, but had trouble locking the system for use with the non redundant masking program (NRM) scheduled that night. The NRM program used single aperture observing. We used the final portion of Sunday night to test the robustness of the phasing system. This work continued for the first part of Monday night. Most of this time was intermittently cloudy, preventing any acquisition of nulling sequences.
- Closed Loop Phasing with the FPC cold was demonstrated, and appeared to work well.
- We determined the likely cause of the "fragility" of the phase loop is the tilt capture range.
- Integration of phase and group delay tracking was improved.
- Script testing and detector characterization was worked on while closed.
- Realignment of the left side WFS was carried out to improve its robustness.
- Testing of the replaced "UBC" computer was successful. This computer was showing problems in November.
- Saturday: Closed
- Sunday: Open, carried out NRM. Phasecam engineering for last four hours of night.
- Monday: Cloudy conditions. Opened 5-midnight for further Phasecam engineering.
- Tuesday: Closed
- Wednesday (tonight): Lost due to snow storm.
- The NOMIC camera computer appeared to have a disk failure Tuesday night.
- The SPC translation stage is continuing to show lack of responsiveness. A fix is planned using a new motor controller.
- The NOMIC noise performance vs. flux shows strange behavior that needs to be understood.