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| Parking Lot Off-topic chatter pertaining to movies, TV, music, video games, etc. |
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#1 |
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Franchise Player
Join Date: Feb 2004
Location: I'm in LA, trick!
Posts: 8,700
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Re: All things Science related. λν = c
A particularly interesting article regarding my neck of the woods:
The Center for Land Use Interpretation ![]() THERE ARE DOZENS of aerial photo calibration targets across the USA, curious land-based two-dimensional optical artifacts used for the development of aerial photography and aircraft. They were made mostly in the 1950s and 1960s, though some apparently later than that, and many are still in use, though their history is obscure. Most of them follow the same general form established by the Air Force and NASA (and prior to 1958, its precursor agency, NACA): a concrete or asphalt pad constructed flat on the ground, 78 feet by 53 feet, coated in a heavy black and white paint. The pattern painted on the targets is sets of parallel and perpendicular bars duplicated at 15 or so different sizes, and, sometimes, a large white square. The configuration is sometimes referred to as a 5:1 aspect Tri-bar Array, and follows a similar relative scale as a common resolution test chart known as the 1951 USAF Resolving Power Test Target, conforming to milspec MIL-STD-150A. This test pattern is still widely used to determine the resolving power of microscopes, telescopes, cameras, and scanners. Possibly just of interest to me Last edited by RedskinRat; 02-27-2013 at 01:26 PM. |
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#2 |
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Playmaker
Join Date: May 2012
Posts: 3,754
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Re: All things Science related. λν = c
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#3 | |
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Living Legend
Join Date: Aug 2008
Age: 59
Posts: 21,744
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Re: All things Science related. λν = c
Quote:
:cheeky-sm |
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#4 | |
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Playmaker
Join Date: Dec 2008
Posts: 4,712
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Re: All things Science related. λν = c
This would be incredible if it actually happens:
http://http://www.space.com/19981-pr...ried-2018.html Quote:
__________________
Dolphins get good press for saving drowning humans.But we only hear about the swimmers theyve pushed ashore.You know who we havent heard from: all the people theyve pushed out to sea.Dolphins dont know what theyre doing-they just like pushing things. |
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