First, we want a big-picture look at a day's data to see what sort of interference we have to deal with. Since this will not fit on one screen we want to be able to scroll quickly in time and frequency and to blink the display between the two polarization planes. Both polarization planes need to scroll together so that they are always synchronized in time and frequency on the display. The zoom center should be under cursor control. Long jumps within the data field should be quickly accomplished with the entry of a time or a time and frequency or, maybe, a scan number.
Most data has a large DC component that is of little interest in the grey-scale display.
Some displays have contrast and brightness controls. The pixel intensity, frequency, and time should be displayed for the cursor position with the click of a mouse button. Data ranges may be selected either by cursor controlled rectangle or by keyboard range specification. At least one, or preferably a selection of several, flat-fielding algorithms are required. On that works is to scan several minutes worth of spectra for interference spikes with a highpass filter, interpolate across the spikes, and derive an average passband gain function by averaging this data into one spectrum.