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Good news!

It was just announced that NASA/METI released today the 30m global (83degreesNS, about 22600 scenes) ASTER GDEM based on 1,264,118 single ASTER dems from 1.4 million scenes in total. (95% vertical ci: 20 meters, 95% horizontal ci: 30 meters).

Tuesday the Lunar Reconnaissance Orbiter (LRO) has successfully entered orbit around the moon. Also, the Lunar Crater Observation and Sensing Satellite (LCROSS) competed a very important maneuver, which show that all the instruments are working just fine.

The Nature article “Sodium salts in E-ring ice grains from an ocean below the surface of Enceladus” by F. Postberg et al., discusses the possibility of a liquid subsurface ocean in Saturn’s moon Enceladus. Here follows the abstract. The full paper can be viewed by Nature’s subscribers.

Just the other day I was going through some Remote Sensing books, preparing a class on color theory. It is just cool the way our brain works and how it changes our perception of colors. Our brain always try to identify the color (or shade of gray) by comparing it with the colors/shades in its surroundings. This way we always tend to see a shade of gray a little darker than it really is, and if someone would ask you to point the 50% mark on a gray scale gradient, you would most likely point to the 60 or 65% shade.

Tá, tá, tá. Eu sei. Este post está atrasado mesmo.