Physics
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979soph...64..403b&link_type=abstract
Solar Physics, vol. 64, Dec. 1979, p. 403-415.
Physics
5
Astronomical Photography, Atmospheric Turbulence, Error Analysis, Lower Atmosphere, Standard Deviation, Turbulence Effects, Atmospheric Refraction, Daytime, Elevation Angle, Optical Correction Procedure, Telescopes
Scientific paper
Fluctuations in the angle-of-arrival of a luminous wavefront are investigated by placing a narrow slit over the image of the solar limb, and observing the entrance pupil through this diaphragm. Measurement of the standard deviation σAA of these fluctuations, in a direction perpendicular to the solar limb, provides sufficient information to estimate an absolute parameter characterizing the seeing, i.e. Fried's parameter r0 or the equivalent parameter ∫L C2N(h)dh which gives the integral, over an atmosphere thickness L which depends on the spatial and angular filterings performed by the slit, of the structure constant C2N characterizing fluctuations in the air's refractive index. Simultaneous estimations of σ2AAand and ∫L C2N(h)dh permit a linear relationship to be established between these two quantities. The result is interpreted theoretically by integration of the two-dimensional power spectrum for the angle-of-arrival fluctuations. The influence of filtering effects is discussed.
Such a calibration can be performed for a given telescope and slit, enabling the system to be used as a seeing monitor.
Aime Claude
Borgnino Julien
Ricort Gilbert
Verning J.
No associations
LandOfFree
A study of the degradation of daytime astronomical images due to turbulence in the lower atmosphere by measurement of the standard deviation of the angle of arrival does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A study of the degradation of daytime astronomical images due to turbulence in the lower atmosphere by measurement of the standard deviation of the angle of arrival, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A study of the degradation of daytime astronomical images due to turbulence in the lower atmosphere by measurement of the standard deviation of the angle of arrival will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1450321