Southern Man

Thursday, December 08, 2011

Airplanes in the Day Sky

While working scouting for geocaches to try on an upcoming drive to Dallas Southern Man stumbled across the following...

There's a cache marker in the lower-right corner, but what is that at the upper left?

Why, yes, that is a commercial jet photographed in mid-flight from outer space. Anyone care to identify it for us?

This also betrays how satellite photography works: four images taken in rapid succession using a black-and-white CCD: first through a blue filter, then through a green filter, then through a red filter (note how green plus red = yellow, just like we learned in primary school), and unfiltered for luminosity. The four images are then combined to form a full-color picture.

Posted because Southern Man thought it was cool. That is all.

[added later] SR (consulted by email) points out some details that make it a Southwest Airlines Boeing 737 and that's good enough for Southern Man.


At Thursday, December 08, 2011, Anonymous Anonymous said...

What are your thoughts on Sheriff Joe Arpaio's cold case posse investigation of Obama? The results are due out next week I think in spite of the multiple death threats.

At Thursday, December 08, 2011, Blogger Southern Man said...

Sheriff Joe is a conundrum: he does many things right but the things he does wrong are so wrong that they defy imagination.

At Friday, December 09, 2011, Anonymous Anonymous said...

Who is Sheriff Joe? Why would a sheriff's office investigate Obama? Was he into stuff when he lived the guy's territory?


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