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Report of the ALMA
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Summary
183GHz Water Vapour Radiometers for ALMA
Introduction
Status of current 183 GHz phase correction experiments
Design Considerations for the ALMA water vapour monitors
Requirements
Basic technical approach
Mixer or HFET?
Cooled or uncooled?
SIS
Cooled Schottky
Form of switching
Form of backend
Local Oscillator
Beam Offsets
Conclusions
Al Wootten
2000-04-04
