Originally Posted by
212man
John, the AAIB bulletin shows radar traces that would appear to be at 1 second intervals. I think some cross-correlation with google earth would give you the ground speed.
What makes you think the plot is every second?
Just wondering as there's quite a big dip to 500-odd feet (which could always be an isolated dodgy reading) but that's a short period of time to drop and rise again (is it) which made me think the interval could be more than 1 sec, based on assumption rather than fact though.