Solar eclipse predictions

Mottmann, John

doi:10.1119/1.12038

Cited by 4 publications

(4 citation statements)

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“…The Moon was at Perigee position at a distance of 366 127 km subtending a very close angle of 0.54 degrees, slightly higher, which caused the eclipse totality at certain locations [21]. Assuming the radius of the Sun's disk to be unity, the radius of the Moon disk was 1.0305.…”

Section: Eclipse Progressionmentioning

confidence: 99%

Monitoring a photovoltaic system during the partial solar eclipse of August 2017

Kurinec¹,

Kucer²,

Schlein³

2018

EPJ Photovolt.

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Abstract. The power output of a 4.85 kW residential photovoltaic (PV) system located in Rochester, NY is monitored during the partial solar eclipse of August 21, 2017. The data is compared with the data on a day before and on the same day, a year ago. The area of exposed solar disk is measured using astrophotography every 16 s of the eclipse. Global solar irradiance is estimated using the eclipse shading, time of the day, location coordinates, atmospheric conditions and panel orientation. A sharp decline, as expected in the energy produced is observed at the time of the peak of the eclipse. The observed data of the PV energy produced is related with the model calculations taking into account solar eclipse coverage and cloudiness conditions. The paper provides a cohesive approach of irradiance calculations and obtaining anticipated PV performance.

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Section: Eclipse Progressionmentioning

confidence: 99%

Monitoring a photovoltaic system during the partial solar eclipse of August 2017

Kurinec¹,

Kucer²,

Schlein³

2018

EPJ Photovolt.

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“…Surprisingly, it has not been possible for us so far to find literature in textbooks [1][2][3] or, e.g., the best available website on eclipses [5] on the problem of theoretically modelling illuminance during the partial eclipse phase although this is probably common knowledge for astronomers and buried in the old literature. Original publications of the last few decades usually focus on sky brightness or radiance (rather than illuminance) as well as polarization, in particular during the short period of totality, on predictions and on the influence on twilight and horizon colours during totality [6][7][8][9][10][11][12][13]. The closest statement [6] to illuminance during the partial phase in these papers was that the sky light may be considered as attenuated sunlight up to at least 99.8% obscuration.…”

Section: Introductionmentioning

confidence: 99%

Measurements and predictions of the illuminance during a solar eclipse

Möllmann

Vollmer

2006

Eur. J. Phys.

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Measurements of illuminance during a solar eclipse are presented. The data are compared to theoretical predictions, based on a geometrical model for obscuration. The model assumes a straight and uniform motion of the sun and moon as well as a spherical shape of both, i.e. it neglects any effects of limb darkening. Furthermore, the sun's disk is assumed to have homogeneous luminosity, i.e. any luminosity variations due to sun spots are neglected. Input parameters are the duration of the eclipse, the duration of totality, the impact parameter, i.e. the distance between the two trajectories of sun and moon, and the sizes of sun and moon. The model applies to all types of eclipses, partial, annular and total.

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“…The monument's main purpose was to predict eclipses. Additional background on the history and the astronomy of lunar cycles [7][8][9] and solar eclipse [10,11] can be found in the references.…”

Section: Introductionmentioning

confidence: 99%