anomalous propagation (United Planet's Cruiser C-57D)

            Fata Morgana-type atmospheric phenomena

atmospheric ducting is the explanation for certain optical mirages, and in particular the arctic illusion called "fata morgana" where distant ocean or surface ice, which is essentially flat, appears to the viewer in the form of vertical columns and spires, or "castles in the air."
People often assume that mirages occur only rarely. This may be true of optical mirages, but conditions for radar mirages are more common, due to the role played by water vapor which strongly affects the atmospheric refractivity in relation to radio waves. Since clouds are closely associated with high levels of water vapor, optical mirages due to water vapor are often rendered undetectable by the accompanying opaque cloud. On the other hand, radar propagation is essentially unaffected by the water droplets of the cloud so that changes in water vapor content with altitude are very effective in producing atmospheric ducting and radar mirages.
   

Taken on: October 13, 2011

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anomalous

propagation

Planet's

Cruiser

C-57D)

fata morgana

castles in the air.

atmospheric $Everybody's photos tagged with refractivity$ refractivity

water

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Camera: Panasonic DMC-FZ20, f/8.0, 6 sec, 6mm, ISO 80 (more info) (hide info)

Camera:	Panasonic DMC-FZ20
Aperture:	f/8.0
Exposure Time:	6
Focal Length:	6mm
ISO:	80
Exposure Bias:	0 EV
Flash:	Off, Did not fire
Exposure Program:	Manual
Exposure Mode:	Manual
Metering Mode:	Spot
White Balance:	Auto
Contrast:	High
Sharpness:	Hard
Color Space:	sRGB
Software:	Ver1.0
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