It describes the current status in detail and gives cookbook recipes for OTF observations and data reduction. Up to 4 receivers can be used simultaneously for OTF observations, although the optimum scanning velocity usually depends on the observing frequency. We recommend that you contact an astronomer with a demonstrated experience in OTF observations on the 30m Telescope prior to selecting this observing technique. Astronomers from the IRAM-Granada staff are willing to help you in the planning of your observations. Frequency switching is possible.
Baselines are ordinarily flatter when using one single receiver.
An instantaneous IF bandwidth of 1 GHz is available for the 230G2 receiver. Many proposals underestimate the observing time needed to carry out the programme, even under excellent weather conditions. We ask you to pay special attention to this matter as time underestimation is now a major criterion for proposal rejection . The report Calibration of spectral line data at the IRAM 30m telescope explains in detail the applied calibration procedure.