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Home | About Suzaku | Journal |
I don't know what time it is any more. You've probably seen
the maps of spacecraft orbits, in movies like "Apollo 13," where
the spacecraft track makes a kind of sine wave across the Earth, with the
peak at a different place each time. That's because the satellite
travels in a fixed path, taking about 90 minutes to get back to the
same place, while the Earth rotates underneath it.
Well, not exactly. If the orbit were truly stationary, the time when
the satellite appears each day would get 4 minutes later per day on
average (those of you who have been paying attention will recall that
4 minutes as the difference between a solar day and a sidereal day).
But actually the satellite's orbit isn't fixed. The equatorial bulge
of the earth puts a torque on the orbit, so (in our case) it actually
gets about 30 minutes earlier each day. And we only have the one
ground station, at the launch site, so we can only communicate with
Suzaku when it's over that station. Which is earlier every day.
All of which boils down to we're now getting up (and by "we" I mean
"me and Dan") in time to be in the control room ready to go at 5AM.
And it's gonna get worse before it gets better.
Thursday was a holiday, so they put Suzaku in safe-hold mode and we
all took the day off. They needed to test safe-hold mode, and the
ops team needed a break, so that worked well. In safe-hold mode it
spins very slowly, facing the solar panels directly toward the sun,
and turning off most operations. Most satellites have such a mode;
they put themselves into it automatically in certain situations, e.g.
if they detect a problem with the attitude control system.
While Suzaku spun slowly in the void, we went all resort-y.
After working in the morning (hey, there's already lots of housekeeping
data to look at), we took off for the afternoon. It was a beautiful
day, so we partook of the local scenery (and 'round here, scenery is
about all there is).
Steps 1 through 555 were up the side of one of the local small
mountains. The Japanese number 5 is "go", so 555 is "Go-go-go!" We
didn't count the steps, but there's a sign saying there are 555 of
them. There's a boardwalk at the top of the steps, with a nice
view. A further short hike goes up to the top of the hill, where
there are some cute little hexagonal cottages, a little shrine, and a
cell phone tower. The old and the new, y'know.
Course it was probably at least 90 degrees out, and very humid, but
hey, ocean! There seems to be essentially nobody on the beach behind
the hotel, so after the mountain climb we went for a swim. Beautiful
water, nice sand, and a six-pack. Can't beat that!
Or can you? After the beach, the onsen. For those unfamiliar with
the concept, it's a Japanese hot spring. The one at this hotel has a
number of pools: a mineral bath; a hot bath with bubble jets (and
electric shocks if you want them!); a cold bath; and a sauna. You
first undress in the changing room, then clean yourself at one of
many little washing stations with water and soap and shampoo, and
then go to the bath. No, the men's and women's sides are separate.
The sauna sits at 86 degrees C, which is over 180 Fahrenheit. They
have a 12-minute shot clock in there, and by the time the 12 minutes
is up it seems mighty hot. Then back into the cold bath. (Yes
Christina, the difference is only 100 degrees, you win.)
Many of the others enjoy the massage chairs after, but they just hurt
me. I think I'm too big for 'em.
Anyway, we were all very rested after that!
Our time here is almost through. The last contact orbit today ends
before noon, so we'll fly back to Tokyo after that, and be there
ready to get started again Monday morning. Me personally, I'm going
to Denny's on Monday morning and order everything they have that
doesn't include fish! The food here wasn't bad, but I'm sure ready
for something else.
So far things are going great. Another week or so until we do the
first cooling cycle and see if our detectors are really working. But
at this point everything looks both hunky and dory.
Sure feels good!
Signing off from Kagoshima.
-Kevin
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