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Poster: agip
Subject: RE: QUESTION - Rule for finish line (part of the body)
Body:


marksman wrote:

[quote]JoeGarland wrote:

Yet in races now a runner finishes and immediately her time, to 100s, is posted and that ends up being the official time. Can anyone explain that? What is triggering the time we see for splits or the finish?


Great question! The time displayed instantly for first place is caused by the runner crossing photoeyes at the finish line. By using three photoeyes stacked on top of each other, a small object (like an arm) is unlikely to trigger all three at once. A torso will break all three, and when all three are broken simultaneously, the clock stops. Sometimes the photoeye time will differ from the photofinish time by 0.01. When this happens the times are probably only one or two thousandths different, but show as 0.01 different because of rounding. Usually the times agree as you observed when a good photoeye setup is used.[/quote]

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How does the system know who was in first, second third, etc? Does a person have to decide that? It seems to go on teh board instantaneously, but how can the FAT system know the finishing order?
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