posted on Apr, 4 2013 @ 03:36 PM
I was trying to match some of the longer exposures listed in the instrument data files with the tiff images, and the results seem to be all over the
place. Some of the 30 second (not miilisecond) images are totally blank, in the raw state anyway, but they are 16 bit images, and my software only
runs 8 bit, so maybe I'm losing a lot of info? They sure as heck don't make it easy to view them anyway. I tried messing with the images using just
the 8 bits, but can't get anything to show up on most of them by playing with the settings. Now surely there should be stars visible at least, with
even a 4 second exposure and clear filters?
The very long exposures seem to be for when they use the methane filters, they apparently have a very narrow bandpass, so let through few photons.
Anyway, taking pictures in space doesn't seem like such a simple job, and a lot of manipulation is required to make them look anything like what our
eyes enjoy looking at. I still say you would see next to nothing if you were out there with Cassini, and space travel will be extremely boring, unless
you could take a couple of playmates along maybe!
Here's one I looked at. 2 minute exposure, but there aren't many stars for such a long exposure, and some of the specks may be hot pixels, which is
what they are testing for with starfield images.
^IMAGE = ("N1611412084_1.IMG",8)
INSTRUMENT_NAME = "IMAGING SCIENCE SUBSYSTEM - NARROW ANGLE"
EXPOSURE_DURATION = 120000.000000
FILTER_NAME = ("CL1","CL2")