Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soph..149..213i&link_type=abstract
Solar Physics, vol. 149, no. 2, p. 213-230
Astronomy and Astrophysics
Astronomy
24
Astrolabes, Atmospheric Effects, Atmospheric Turbulence, Error Analysis, Image Processing, Instrument Errors, Seeing (Astronomy), Solar Diameter, Turbulence Effects, Visual Observation, Astronomical Photography, Cameras, Charge Coupled Devices, Least Squares Method, Statistical Analysis
Scientific paper
In order to deduce significant astrophysical results from solar diameter measurements it is necessary to take an accurate account of instrumental and atmospheric effects. This paper presents a comparison between visual and charge coupled device (CCD) camera measurements performed by means of the Calern Observatory solar astrolabe during the last 4 years; this allows us to evaluate visual measurements done previously (1975-1989). Then, a study of atmospheric effects is developed. From CCD measurements, the image quality, expressed by Fried's seeing parameter, r0, is estimated and related to the errors occurring in solar diameter measurements. A statistical analysis gives about 0.26 arc sec (or 0.13 arc sec for the semi-diameter) as the lowest value that this error may reach at Calern Observatory. One conclusion of this work is that it is important in the future to have image quality observations, obtained using a dedicated monitor, in order to evaluate and classify the measurements. A survey of the seeing might so lead to improve the precision of the results by weighting each diameter estimation and eventually to schedule the observations.
Borgnino Julien
Irbah Abdanour
Laclare Francis
Merlin Guy
No associations
LandOfFree
Solar diameter measurements with Calern Observatory astrolabe and atmospheric turbulence effects 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 Solar diameter measurements with Calern Observatory astrolabe and atmospheric turbulence effects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar diameter measurements with Calern Observatory astrolabe and atmospheric turbulence effects will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-956398