The following plots show the relative frequency occupancy of observations done at the NRAO 12 Meter Telescope at Kitt Peak, from September 1999 to the beginning of this week. The statistics were calculated on the basis of "scans" rather than strictly observing time, but the difference should be minimal. The figures shown are statistical summaries, binned every 500 MHz.
The relative percentage occupancy of frequencies (blue histogram), shown with an atmospheric zenith transparency curve assuming 4mm PWV (red dotted line).
A "yes or no" plot of frequency occupancy (blue histogram) shown with an atmospheric zenith transparency curve assuming 4mm PWV (red dotted line).