Attention Deficit Disorder Prosthetic Memory Program

Photo Calibration Targets

ADDPMP262
Photo Calibration Targets - © Attention Deficit Disorder Prosthetic Memory Program

Aerial photo calibration targets are 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 some 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. This type of test pattern is normally used as a printed chart in an optics lab, to determine the resolving power of microscopes, telescopes, cameras, and scanners. Their outsized, outdoor brethren are in the laboratory of the landscape.
The targets function like an eye chart at the optometrist, where the smallest group of bars that can be resolved marks the limit of the resolution for the optical instrument that is being used. For aerial photography, it provides a platform to test, calibrate, and focus aerial cameras traveling at different speeds and altitudes. The targets can also be used in the same way by satellites.

Photo Calibration Targets - © Attention Deficit Disorder Prosthetic Memory Program
Photo Calibration Targets - © Attention Deficit Disorder Prosthetic Memory Program
Photo Calibration Targets - © Attention Deficit Disorder Prosthetic Memory Program
Photo Calibration Targets - © Attention Deficit Disorder Prosthetic Memory Program
Photo Calibration Targets - © Attention Deficit Disorder Prosthetic Memory Program
Photo Calibration Targets - © Attention Deficit Disorder Prosthetic Memory Program
The Music of the Spheres - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP131
The Music of the Spheres
Ijen - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP345
Ijen
Myanmar Coup Aerobics - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP035
Myanmar Coup Aerobics
List of films that most frequently use the word "fuck" - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP494
List of films that most frequently use the word "fuck"
Shuttle Endeavor in the streets of Los Angeles - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP241
Shuttle Endeavor in the streets of Los Angeles
Aerican Empire - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP579
Aerican Empire
Obetrol - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP524
Obetrol
Aircraft Camouflage - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP595
Aircraft Camouflage
Trepanation - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP197
Trepanation
Colorless Green Ideas Sleep Furiously - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP502
Colorless Green Ideas Sleep Furiously
Vantablack - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP334
Vantablack
The Truman Show Delusion - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP426
The Truman Show Delusion

You are using an outdated browser.
Please upgrade your browser to improve your experience.