31 Oct '11, 1pm

The Big Secret Behind NASA's Blue Marble Earth Image #space #Photos

The Big Secret Behind NASA's Blue Marble Earth Image #space #Photos

To make the Earth look realistic, or at least how I imagined the Earth would look, I needed to do some work. First of all, the satellite images weren’t usable over deep water (it collects data, but there’s no automated process to detect clouds and correct for the atmosphere), so I needed to add some color into the water. NASA measures chlorophyll in the ocean (a way of monitoring phytoplankton ), so I grabbed a month’s worth of that data, colored it blue and green (I looked at individual satellite images to get a sense of what hues to use), and used that map for the ocean. I also had to add a stand-in for sea ice, since it’s impossible to measure chlorophyll beneath a few meters of snow and ice. At least that was simple–I just replaced missing data near the poles with white. In addition to the sea ice, I brightened and reduced the saturation of Antarctica, which was pasted...

Full article: http://earthobservatory.nasa.gov/blogs/elegantfigures/201...

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jobandshop.com 01 Nov '11, 11pm

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Beautiful Blue Sky to Kuching via @kenwooi

Beautiful Blue Sky to Kuching via @kenwooi

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The gathering, which takes place at Del Monte Aviation’s private executive hangar from 1 to 4 p.m. on Saturday, November 1...

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jobandshop.com 06 Nov '11, 2pm

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Crepuscular Rays, India [image] #NASA

earthobservatory.nasa.gov 30 Oct '11, 10pm

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Not Feeling Blue. Loving Blue!! Of the @SergioRossi kind, natch!

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thebaghagdiaries.com 10 Nov '11, 8pm

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Develop for the Blue Ocean by @joashweecikai

Develop for the Blue Ocean by @joashweecikai

e27.sg 08 Nov '11, 6am

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