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Pure proportional navigation (PPN) is suitable for endoatmospheric interceptions, for its commanded acceleration is perpendicular to interceptor velocity. However, if the target is much faster than the interceptor, the homing performance of PPN will be degraded badly. True proportional navigation (TPN) does not have this problem, but its commanded acceleration is perpendicular to the line of sight...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.