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Mark attaches the sun shield "chin".
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Barth and Marie (partially hidden) install the flight batteries.
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Jeff gets checked out on the scissor lift, so that we can hold a dewar
of liquid nitrogen in the beam as far away as possible.
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Mark and Jeff measure the height of the extended lift.
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Barth receives some pretty flowers from Mark. Looks like he forgot to
water them, though.
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Mark performs an indoor nitrogen-in-beam test. This is when we first
discovered that something was not at all right.
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A more direct test.
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Testing the primary coverage.
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A jury-rigged chopper. Liquid nitrogen is put in the styrofoam cup,
which sits behind a rotating blade. The blade blocks the nitrogen from
the detectors, so that the cold signal turns on and off repeatedly.
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Ed, Don, and Jeff watch liquid helium boil off as it is purged from
the dewar.
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Still purging.
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