Incoherent scatter spectra from 17 August with a little less than 8.5 minutes of integration. Blue lines show the data and red lines the fitted spectra for six consecutive times at four F-region altitudes.

With the addition of eight panels purchased by HAARP, 16 panels will soon be operational. Initial experiments will look for PMSEs.

Four seconds of heater-induced plasma line measurements. The HF heater was turned on at 1 sec time on the x-axis with a heating frequency of 5.35 MHz. This plot shows the plasma line overshoot effect on both the decay mode and at least six cascade mode lines.