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28 Jan/95, 2:13 - 2:15 UT

Partial WIND data shows solar plasma speeds around 310 km/s and undisturbed IMF values close to zero. IMP8 shows a sign change in the tex2html_wrap_inline4540 component from positive to negative about 30 minutes before the event. The tex2html_wrap_inline4548 index at the time of the event was 1.0.

Little backscatter from both radars was observed during this event as can be seen in Figure 5.40; most notably there exists no overlap between the Saskatoon and Kapuskasing scatter in the regions where backscatter was observed.

Figure 5.40: Map of spectral findings from the Saskatoon and Kapuskasing radars: 28 Jan/95

From Figure 5.41 one can see that the satellite flight path passed briefly through a region where Kapuskasing backscatter was observed. At about tex2html_wrap_inline5590 it passed through a region where double-peaked spectra were observed. No backscatter was observed in the region traversed by the satellite after tex2html_wrap_inline5592 .

Figure 5.41: Peak-map with overlaid flight path of the DMSP F12 satellite: 28 Jan/95

The energy of the electrons when they can be detected (before tex2html_wrap_inline5590 ) is well below tex2html_wrap_inline5340 (see Figure 5.42).

Figure 5.42: Average electron energy and flux determined from SSJ/4 instrument measurements: 28 Jan/95

The ionization rate graph in Figure 5.43 shows two F-layer rate changes of one order of magnitude at about 7980 and at tex2html_wrap_inline5600 ; the satellite location corresponds well with the region where the double peaks were observed. Also, the F-layer ionization rate shows relatively high peaks until about tex2html_wrap_inline5592 . E-layer ionization and conductivities are negligible. The graph in Figure 5.44 is mostly dominated by a noisy response, in keeping with the very low electron fluxes.

Figure 5.43: Estimated ionization rates at E- and F-layer heights determined from electron spectra measurements: 28 Jan/95

Figure 5.44: Estimated E-layer conductivities from the Robinson model: 28 Jan/95

The few points in the velocity map of Figure 5.45 show different flow directions west and east of the tex2html_wrap_inline5604 E line. The map contains too little information for any further conclusions.

Figure 5.45: SuperDARN velocity map: 28 Jan/95

next up previous
Next: 18 Feb/951:25 - Up: Morphology during a Complete Previous: 26 Jan/9516:27 -

Andreas Schiffler
Wed Oct 9 10:05:17 CST 1996