From: "Tim Shoppa" <shoppa_classiccmp at trailing-edge.com>
Sent: Sunday, June 12, 2005 5:37 AM
8GB? Somehow I
would think that Pioneer 10 and 11 have sent back
more data than that.
Max data rate for the link is only 2048 bits per second, and that's
only when all the antenna-pointing for such a high rate is available
(those antennas have other things to cover in general...)
At 2048 bits per second, you get 8 GBytes/year. But most of the
instruments you'd use when not doing a planetary flyby are happily
served by a data rate of a few bits per second (which is how it spent
most of its active life).
Here in 2005, though, it's likely that the most interesting instruments
are those that had low data rates. Not that the pictures weren't
pretty, but all the folks I worked with (space plasma physicists) were
far more interested in the not-pictures :-). I'm not sure how 100
tapes got turned into 8 Gbytes, but it's likely that data from a probe
that spans decades have their data spread among a lot of original tapes.
Tim.
More to the point no one should assume that ant tape is full.
The tapes could have easily been segregated by time and the data stream is
not constant so the amount of data accumulated would vary day to day.
Randy
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