"It takes the paper and pencil and re-entry out of it, " said Jeff Painter, information specialist for the WSDA's plant protection division.

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There are other reasons to expect seasonality will work out to produce a lower market rather than higher by the time seasonal re-entry signals are triggered.

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But, as Jeffrey Sonnenfeld, author of an extensive study of the subject, points out, even successful departing bosses often try to ease the pain of re-entry into normal life by demanding to keep the trappings of their heroic stature: limousines, offices, private jets.

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Its best estimate for the timing of the re-entry would have seen UARS come in at a point well out into the North Pacific.

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And in 1995, there was a small piece of fabric that was sticking out and it really raised the temperature of some parts of the heat shield on re-entry.

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