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Great work Dennis.
Here's how I get the PA with video - If I run my occultation timing device over the video stream (I use a GSTAR-EX), then I can registax align it over a number - ie a non-moving object to give the 'streak' when i stop the scope drives - I've enclosed an example I took a few weeks back. There are plenty of software packages that can overlay an image on top - webcamMax for eg. I'm sure there must be an easier method but it works for me.
I didn't do such a good job - I needed to have turned up the gain a little to get a more saturated path, but it is enough to get a reading.
The interesting thing is that my PA seems to be much closer to 90 degrees than it is predicted to be, and your estimated PA is spot-on.
If you get another chance to make a measurement, then it would be very valuable - one of my colleagues at the AAQ could make something useful from it...
Jonathan
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