[Shiraz (Ray)]

Hi
The jetstream was down to about 40-50kts and the seeing this morning was frustrating, with occasional glimpses of stable detail amongst the normal fuzzies and flag waving. It was not good enough for normal RGB imaging, but I tried a sequence with a dispersion corrector fitted. The results are still not very good, but the corrector resulted in improved G and B data at 1/60 sec and an even better luminance at 1/110 sec. In addition to the reduced dispersion, the shorter exposures also appear to have resulted in less smearing in the LRGB image and the full band signal was less noisy (~15-20% of AVI images were stackable). The gain in overall detail was useful for the very low altitude (33deg) and the changes in colour balance were not excessive. Will post a better test when/if the jetstream ever goes away enough to let some fine detail through (I'm not holding my breath). Thanks for looking.
regards ray