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Pinhole Solar Monitor tests in the Basilica of Santa Maria degli Angeli in Rome

Published online by Cambridge University Press:  01 November 2006

Costantino Sigismondi
Costantino Sigismondi
Affiliation:
ICRA, International Center for Relativistic Astrophysics, P.le Aldo Moro 5 00185 Rome, Italy E-mail: sigismondi@icra.it
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Abstract

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A pinhole camera has the advantage of undistorted field of view. Its imaging capability is limited by random (diffraction and atmospheric seeing) and systematic (penumbra) effects. The Pinhole Solar Monitor, PSM, measures the solar angular diameter by timing meridian transits. Meridian transits have been videorecorded with UTC synchronization at the pinhole gnomon of Santa Maria degli Angeli church in Rome. The tarature of this Clementine Gnomon is outlined with its accuracy as PSM. On the Moon an array of such PSM equipped with 1000 lines for parallel transits can monitor 0.1” variations of solar diameter.

Keywords

Site testingHistory of AstronomyAstrometrySun: fundamental parameters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S233: Solar Activity and its Magnetic Origin , March 2006 , pp. 521 - 522
Copyright
© 2006 International Astronomical Union