USING ECLIPSE OBSERVATIONS TO TEST SCINTILLATION MODELS

Near second and third contact during a solar eclipse the spatial spect rum of the solar illumination changes as the relative power at high sp atial frequencies increases strongly. Since groundlevel atmospheric sc intillation depends on a weighted integral of the image power spectrum , we can expect to see a measurable time dependence to solar scintilla tion during an eclipse. This effect was observed during an annular sol ar eclipse and quantitatively compared with a scintillation model.