Abstract
Stellar scintillation data were obtained on a single night at a variety of zenith distances and azimuths, usinga photon-counting photometer recording at 100 Hz simultaneously at wavelengths of 0.475, m and 0.870 Am.Orientable apertures of 42-cm diam separated by 1 m were used to establish the average upper atmospherewind direction and velocity. Dispersion in the earth's atmosphere separate the average optical paths at thetwo wavelengths, permitting a reconstruction of the spatial cross-correlation function for scintillations, independentof assumptions about differential fluid motions. Although there is clear evidence of a complicatedvelocity field, scintillation power was predominantly produced by levels at pressures of 130 ± 30 mbar. Thedata are not grossly inconsistent with layers of isotropic Kolmogorov turbulence, but there is some evidencefor deviation from the Kolmogorov spectral index and/or anisotropy.
Original language | English (US) |
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Pages (from-to) | 3227-3236 |
Number of pages | 10 |
Journal | Applied optics |
Volume | 20 |
Issue number | 18 |
DOIs | |
State | Published - Sep 1981 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Engineering (miscellaneous)
- Electrical and Electronic Engineering