Overall during semester 00B receiver W was used rather sporadically at D-band, a result of the relatively low coincidence rate of user demand and excellent sky conditions. Although the results are good on the whole, basic instrumental parameters at both C and D bands are still in very short supply due to the inaccessibility of Mars and an extended period of relatively rather poor weather conditions. It will be necessary that these observations are flexibly scheduled within the time frame for which suitable planets are available, since excellent weather conditions are essential for this work. The C-band mixers are expected to have a typical DSB Trec value of about 150K over the operating range of about 430 to 510GHz. The D-band mixers should have a DSB Trec of typically 350K, although perhaps rising sharply at the higher frequencies.
Availability has an element of uncertainty due to the problems noted above.
At 1.8GHz bandwidth the spectral resolution is about 1.5MHz. Some special configurations can be used to allow more than one line to be observed at the same time if the lines are suitably situated in frequency space. See the User's Guide for further information. The DAS is operating normally in all modes. We expect the DAS to be operating normally.