The observer must specify all aspects of his program in an observing procedure. This must include RF bandpass, atmospheric, and phase calibrations and appropriate time intervals. Standard observations can be made using the general, parametric procedures listed in Section .
The operator will execute the observing procedure, and the on-duty astronomer will monitor the data quality by examining the observations of phase calibration sources. In the case of peculiar observing conditions (high or exceptionally low phase drifts, calibrators too weak, etc.), the on-duty astronomer has full authority to modify the parameters of the observing procedures. He will, of course, try to consult with the observer or local contact.
Non-standard observations may require a specific arrangement with the local contact or on-duty astronomer.