Thanks for your nice comments.
Quote:
What was the time of the 2 avi's? You mentioned you took others on that same morning of the 21st - did you get closer (or even on) the time of the GRS's transit? I'd like to see how close the GRS's longitude was to the expected 103°
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Glen, I can't remember the exact time, as I've deleted the original avi after I extracted the frames, so the timestamp is gone.
But, I'm using the "Jupiter 2" program for GRS transit predictions, and it has the input set to 103°. I can say that it's been accurate so far so with it's predictions so if it's not 103, it's not far off. I haven't been imaging while the GRS crossed the meridian, so I can't confirm for sure. Hopefully in the next few days i'll get the opportunity.
Regarding the netpbm tools, I downloaded the individual netpbm tools I needed from here:
http://tutornet.ru/TEX/Soft/MiKTeX/UTIL/NETPBM/GNU/bin/
Bird's script is written in unix shell, so it won't run on DOS. You can either try and convert it to work as a batch file (using dos batch language), or, what I did was download and install "cygwin", which is a unix-like shell for DOS. So you can run unix commands in a DOS window. The shell script then worked without modification.
Well, I added a few things to it such as passing in the directory to process images from, and adding the path to the front of the netpbm exe's.
Thanks again.