Atmospheric scintillations for measuring remote wave fronts

Erez N. Ribak

doi:10.1117/12.228480

15 December 1995 Atmospheric scintillations for measuring remote wavefronts

Erez N. Ribak

Proceedings Volume 2580, Optics in Atmospheric Propagation and Adaptive Systems; (1995) https://doi.org/10.1117/12.228480
Event: Satellite Remote Sensing II, 1995, Paris, France

Abstract

Stellar scintillations provide statistical information about the higher atmosphere (7 - 12 km). Since each realization of scintillation is the Fresnel diffraction off high altitude turbulence, it can be inverted separately. Sensors for adaptive optics integrate the wave front error over all layers of turbulence. They measure scintillation for calibration. But this discarded information yields the high wave fronts. Separate correction for low and/or high turbulence widens the repaired field of view. The method requires that the reference star is bright and small, that the middle turbulence (2 - 7 km) is negligible, and that the sensor has good spatio-temporal resolution. Simulations show that the turbulence can be retrieved, with lowest and highest frequencies lost first.

Citation Download Citation

Erez N. Ribak "Atmospheric scintillations for measuring remote wavefronts", Proc. SPIE 2580, Optics in Atmospheric Propagation and Adaptive Systems, (15 December 1995); https://doi.org/10.1117/12.228480

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available