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Amazing achievement. It's great that they released the telemetry data as well.
Quick (newbie) question - the coordinates given (XYZ) - are these oriented around the plane of travel, or some other scheme? i.e. the satellite is moving forward on the Y axis, right?
Most likely relative to the gyro's axes. Unless they use an accelerometer to calibrate to Earth's gravity well.
When you're in freefall, an accelerometer tells you nothing :).

http://en.wikipedia.org/wiki/Equivalence_principle

Two accelerometers could tell you something! They probably aren't sensitive enough to get the job done at that scale, though.
True! Modern gravity gradiometers/differential accelerometers probably are sensitive enough for coarse orientation, particularly if they were deployed at the perimeter of the sail.

To do so would, of course, obliterate LightSail's budget :)

Source: worked on R&D for the LISA inertial reference system.

I was a little disappointed to read this a low orbit launch where atmospheric drag is higher than any possible propulsion gain from the sail. Apparently this guy piggy backed on a launch of the X37b which in itself is cool they would allow it do so.
A very impressive achievement for a private group. Is there anything it's doing that wasn't done first by IKAROS, though?
Wow, first KickStarter-backed space vehicle?

Is there a URL we can suck LightSail telemetry data from? Or does it directly post to Twitter? ;)