The temporal-frequency spectrum of stellar image motion.

Details The temporal-frequency spectrum of stellar image motion. The temporal-frequency spectrum of stellar image motion.

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995acaps..15..275s&link_type=abstract

Acta Astrophys. Sin., Vol. 15, No. 3, p. 275 - 281

Astronomy and Astrophysics

Astrophysics

Earth Atmosphere: Turbulence

Scientific paper

A universal expression of stellar-image motion spectrum for the collimated wave propagating through atmospheric turbulence is developed in which the effect of turbulent outer-scale is taken into account. The analytical formula for a homogeneous path is given. Calculation shows that the theoretical results agree well with the experiments. The bandwidth required for a measurement system of stellar-image motion and the measurement error resulting in a limited bandwidth are discussed. It is concluded that for angle-of-arrival seeing measurements, standard video frame rates are acceptable provided the sampling period is 10 seconds or more in homogeneous path. But a wider frequency response is indispensable in stellar seeing monitors.

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