January 3, 2006
ALMA Prototype Antenna Evaluation OverviewEvaluation Overview
18
Reflector Surface Accuracy Performance Summary
DRMS £ 3 mm
É
Temperature Sensors
< 40 mm
< 40 mm
Radiometric
DRMS < 7 mm
DRMS < 8 mm
Accelerometers
16±5 mm
17±5 mm
Holography
VertexRSI
AEC
Technique/System
AEC/VertexRSI wind delta(RMS) = 2.1/8.4 micron (FEM).
VertexRSI BUS temperature stability = < 5 micron/K (FEM); Measure ± 3 K (PTP) over 24 hours