Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..123..403p&link_type=abstract
A & A Supplement series, Vol. 123, Jun I 1997, 403-410.
Astronomy and Astrophysics
Astronomy
2
Astrometry, Reference System, Sun: General, Methods: Data Analysis
Scientific paper
In this work we investigate on the stability of the results from solar observations obtained with the modified astrolabes of the Observatoire de la Cote d'Azur/France, of the Observatorio Abrahao de Moraes/IAG/USP-Brazil and of the Observatorio Nacional/Brazil. The mass of data is comprised of 6273 observations of both solar limbs, from 1974 to 1992, and is analyzed to determine the origin of the fundamental reference system and the Earth's orbital parameters. The solution stability was verified by checking against any large variation upon the individual weights, as well as for differentsamples of the whole set of observations. The results were also shown invariant to changes in the adopted model, such as adding unknowns to the refraction algorithm, to the time variation of the obliquity (including the nutation constant) and to the azimuthal anomalies of the refraction. In our analysis we obtain a standard deviation of 0.6" for the combination of the observations with no bias on its distribution. It is also indicated that the Sun observations at astrolabes do not require any further atmosphere modelling complexity.
Andrei Alexander H.
Benevides-Soares Paulo
Laclare Francis
Penna Jucira Lousada
No associations
LandOfFree
Discussion of the results from solar astrolabes 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 Discussion of the results from solar astrolabes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discussion of the results from solar astrolabes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1472139