... Drive the Reflector in elevation to the zenith position. ... Elevation | ... 7 SUMMARY OF REFLECTOR SURFACE ACCURACY MEASUREMENT Test Date: Start Time: End Time: Weather Conditions during Test: Comments: By- _________________ Date- _______________ SUB-REFLECTOR AND FEED POSITION AND ALIGNMENT MEASUREMENT 1 2 OVERVIEW This test is to measure and record the positions of the sub- reflector and feed horn using photogrammetry. ... 3 4 SUB-REFLECTOR/FEED POSITION AND ALIGNMENT MEASUREMENT TEST PROCEDURE 1...

... 2.3 Data acquisition Spectra generated by the Multibeam correlator contain the usual structure seen in spectra from other H i instruments: a bandpass spectrum which is the sum of the sky , ground and receiver temperatures multiplied by the product of the filters in the receiver chain; superimposed on this is a noise ... Note also that sources extended much beyond ,40 arcmin can be imaged poorly in HIPASS images because of the bandpass sidelobe effect described in Section 3.3. ...