sol 46 near Midnight looking North: <a...

sol 46 near Midnight looking North:

Color by Horticolor: Color? What color?

brian, I knew you ( or someone else ) would make that very point about the icy soil animation.

I am faced with a problem when I create these images: Either spend the time making the images -- or spend time documenting how they are made.

I once kept a very detailed journal of my life until I noted in the journal that by spending so much time writing about my life I had less and less time to actually live it.

I choose life and stopped writing. ( It was about a very traumatic period in my life. Some who have read selected portions have said it should be published. Maybe when I get too old and feeble to do anything else I will edit it and release it on the world. )

Anyway, to answer your specific question, since the images were shot with the RAC there were no filters. The maddening part was alignment.

I analyzed the brightness distributions and matched the median and standard deviation of the distributions for the selected areas.

( Honest to God I think the sequences programmed are designed to make it difficult for duffers like myself to do anything with the images. )

I didn't believe the results myself, so I redid them and cross checked them with the entire RAC sequence -- plus registered the area in the trench with an SSI RABC image with a double affine alignment. ( I almost included that in the animation but decided it detracted rather than enhanced the presentation.)

So is it a "real" cross-image comparison? It's as "real" as I can make it with my primitive tools.

Sorry. Since it's not "official" I guess it's not.