... telescope position . Veena and john mathews looked for meteor flashes on the moon using alfa (also see t2874 meteors on moon at 430). ... beam 3b was turned off .. it was dead . beam 6b has been bad.. but it think it had recovered (check cal deflection). jpl horizon ephemeris file was used to track the moon. one 6.4 MHz band centered at 1415 Mhz . ... Tsys was about 80 K off the moon. file 121, 431.8MHz birdies starts drifting to higher frequency. at file 149 it has moved about 1 MHz. ...

... 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. ...