The terrain around S-Pol was flat, with the exception of a depression caused by the Beaver River. This depression ran approximately SW to NE, with the closest center point about 18 km to the NW of S-Pol. The depression was about 8 km broad. This feature is significant in that there was often a lack of refractive index information in that region.
Any blockage of the radar beam tended to be partial blockage, only, and only at the 0.0 ° elevation angle. Typically, blockage affected one or two consecutinve beams, so was considered narrow. Cause of the blockage was likely grain silos located near the radar. There is some variability in time with the occurance of the blockage, possibly due to occassional, small, re-levelling of the antenna pedestal (perhaps by as much as one tenth of a degree), but may more likely be due to changes in the beam path due to atmospheric changes. See blockage.
Clutter images are provided for clear day scans at various elevation angles, both with the clutter filter ON and OFF:
 CF Off, 0.0°, (221 kb) |
 CF On, 0.0°, (214 kb) |
 CF Off, 0.25° (225 kb) |
 CF On, 0.25° (218 kb) |
 CF Off, 0.50° (230 kb) |
 CF On, 0.50° (115 kb) |
 CF Off, 0.75° (227 kb) |
 CF On, 0.75° (221 kb) |
 CF Off, 1.00° (226 kb) |
 CF On, 1.00° (218 kb) |