Astronomical Seeing - Measures of Astronomical Seeing

Measures of Astronomical Seeing

There are three common descriptions of the astronomical seeing conditions at an observatory:

  1. The FWHM of the seeing disc
  2. r0 (the size of a typical "lump" of uniform air within the turbulent atmosphere) and t0 (the time-scale over which the changes in the turbulence become significant)
  3. The CN2 profile

These are described in the sub-sections below:

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