The Physics of Astronomical Seeing. Suprit Singh. Talk for the course Astro Tech. I (2010) under Dr. Yogesh Wadadekar. Overview. Atmospheric Turbulence : Why and When Quantifying Turbulence : Kolmogrov (1941) theory Tatarski (1961) Model : Wave Propagation in Turbulent medium
Talk for the course Astro Tech. I (2010)
Dr. Yogesh Wadadekar
Outer scale L0
Big whorls have little whorls,
Which feed on their velocity;
Little whorls have smaller whorls,
And so on unto viscosity.
Image = Object Point Spread Function
I = O PSF dx O( x - r ) PSF( x ) 2 r0 7 r0
When one discusses "the seeing" one is generally referring to the long exposure FWHM of the PSF.
One can characterize the typical image quality results by compiling statistics on the seeing from night to night.
Seeing quality from Gemini South (Chile, left) and Gemini North (Mauna Kea, right).
* The distortion of above text is not due to seeing !!!