Originally posted by Charley Shaffer
wind-readings: There can be considerable non-overlapping parts of the
``measurement frame'' and the time each individual runner spends on the
straight, which in turn can make the wind-reading very misleading.
(Consider e.g. a wind that averages 2.5 m/s when the winner is actually on
the straight, and 0 m/s in the time between his crossing the line and the
10s expiring: with 8s or less on the straight, the reading is <= 2 m/s.)
In extreme cases, say Bolt vs. an ``olympic tourist'', the last placer may
less than half his time on the straight within the measurement frame.
(Example: Bolt enters the straight 3.5 seconds ahead, the tourist later
spends 14 seconds on the straight => Only the first 6.5 out of 14 seconds
where measured.)
(The corresponding problem in the 100m is much smaller for, at least,
world-class runners.)
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