Polar Stratospheric Clouds
Taken by Harlan Thomas on February 7, 2016 @ Calgary Alberta
Click photo for larger image
  Camera Used: Canon Canon PowerShot SX50 HS
Exposure Time: 1/1600
Aperture: f/8.0
ISO: 80
Date Taken: 2016:02:07 22:27:08
  
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Details:
As the clouds rolled by the Sun, I took pictures from different corners of a building and a C-Can, anything to block out the Sun and not the clouds.
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Thank you.
Posted by 2to4foot 2016-02-08 00:55:25
Iridescent clouds occure rarely in the stratosphere (Type II PSCs) and much more often in the troposphere. This page:
http://www.atoptics.co.uk/fz1074.htm
highlights their differences. The picture shows tropospheric clouds.
Les - www.atoptics.co.uk
Posted by ato912 2016-02-08 02:43:03
Another comparison of PSCs and lower level iridescence here:

http://www.atoptics.co.uk/fz853.htm
Posted by ato912 2016-02-08 03:01:19
 
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