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List of Figures


Figure 1. A schematic drawing illustrating how the propagation velocity is determined. The four spin plane probe are shown. In this case, probes 3 and 4 are nearly aligned with the geomagnetic field. The effective boom length, LB, is 50m*cos(q ). All voltages are splined to a common time base, then the time delay, tDELAY, between V+ and V- is determined by cross-correlation analysis. The central voltage, which provides the reference voltage for the probes, is calculated using the mean of the perpendicular probes (in this case, V1 and V2) to remove effects due to the response of the spacecraft.


Figure 2. Plasma sheet boundary crossing on 3/28/97: (a) Negative of spacecraft potential; (b) Electron flux (over all angles); (c) Eastward magnetic field perturbation; and (d) 0.5 ms snapshot of electric field parallel to the geomagnetic field.




Figure 3. Same as Fig. 2 for 3/10/97 with the addition of panel (bb) Ion flux at pitch angles of 150-180° .




Figure 4. High altitude cusp crossing on 4/24/97: (a) Negative of spacecraft potential; (b) H+ flux; (c) He++ flux; and (d) Electric field parallel to the geomagnetic field for burst.



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Up: Comparisons of Polar satellite observations Previous: References