Showing papers on "Solar eclipse published in 1995"
TL;DR: In this paper, the ionospheric response to the Sun's obscuration was compared with the phase delays reported for several solar eclipses that occurred from 1966 to 1979, mainly discussed in terms of the length of the VLF propagation path affected.
26 citations
TL;DR: In this article, the authors presented solar-radius data from observations made in 1981 and from 1986 to 1990, which are a byproduct of the limb-darkening observations made by Neckel and Labs (1984, 1994) do not show significant deviations from the value which is adopted from Auwers (1891) for computations of solar eclipses and of the Sun's ephemeris in theAstronomical Almanac.
Abstract: Solar-radius data are presented which result from observations made in 1981 and from 1986 to 1990. These data, which are a by-product of the limb-darkening observations made by Neckel and Labs (1984, 1994), do not show significant deviations from the value which is adopted from Auwers (1891) for computations of solar eclipses and of the Sun's ephemeris in theAstronomical Almanac.
23 citations
TL;DR: In this paper, a study of the impact of a total solar eclipse (TSE) on surface atmospheric electricity was made using observations of surface electrical potential gradient, conductivity, and boundary layer parameters recorded during the TSE of February 16, 1980, and on a control day at Raichur.
Abstract: A study of the impact of a total solar eclipse (TSE) on surface atmospheric electricity was made using observations of surface electrical potential gradient, conductivity, and boundary layer parameters recorded during the TSE of February 16, 1980, and on a control day at Raichur. The study showed that with the progressing of the eclipse, as a consequence of inhibited convection, the responses of turbulent mixing in the boundary layer near the ground exhibited diminution and subsequent restoration, respectively. During the next 45 min after the totality, when the surface layer remained stably stratified, the diminution in the potential gradient and the increase in the conductivity was maximum; this was about 60% and 200%, respectively, of their corresponding control day values. This result is in very good agreement with most earlier studies of solar eclipses. The study of the impact of the TSE during 3–4 hours of posteclipse showed significant cooling (∼3°C) of the entire surface air layer and a considerable drop in wind speed over the stretch (1130 km×120 km) of the totality-occupied land region. This significant and systematic phenomenon was responsible for setting up a land-sea breezelike circulation, that is, subsidence/downward air motion over the totality-occupied land region and upward over the noneclipsed land across the totality stretch. This resulted in a considerable aerosol-induced reduction in conductivity and about 5 to 8 times increase in potential gradient during the 3–4 hours of posteclipse. This response of the atmospheric electricity parameters was unlike that observed on the normal days.
17 citations
TL;DR: In this paper, it was concluded from the observations that solar eclipse exerts an influence on the rate of atomic clocks and time comparisons between atomic clocks were made: direct comparisons between different clocks at one and the same station, clock transport comparisons, GPS comparisons and LOC comparisons.
Abstract: During the partial solar eclipse on Dec. 24th, 1992, time comparisons between atomic clocks were made: direct comparisons between different clocks at one and the same station, clock transport comparisons, GPS comparisons and LOC comparisons. And it is concluded from the observations that solar eclipse exerts an influence on the rate of atomic clocks.
6 citations
TL;DR: In this article, a cycle of monuments linked to the Coyolxauhqui myth are recognized as possible images of historical lunar eclipses. And the Calendar Stone is recognized as an image of world cataclysm that may refer to a solar eclipse at the end of the world.
5 citations
TL;DR: In this paper, the spatial spectrum of the solar illumination changes as the relative power at high spatial frequencies increases strongly during an annular solar eclipse and quantitatively compared with a scintillation model.
Abstract: Near second and third contact during a solar eclipse the spatial spectrum of the solar illumination changes as the relative power at high spatial frequencies increases strongly. Since groundlevel atmospheric scintillation depends on a weighted integral of the image power spectrum, we can expect to see a measureable time dependence to solar scintillation during an eclipse. This effect was observed during an annular solar eclipse and quantitatively compared with a scintillation model.
4 citations
Journal Article•
TL;DR: In this article, a shipboard experiment in July 1991 was conducted to study the effect of external forcing on marine stratiform clouds over the California Current and found an apparent response of the marine boundary layer to a solar eclipse through lowering temperatures near the ocean and warming near the marine inversion (each about 0.5 C).
Abstract: A shipboard experiment in July 1991 was conducted to study the effect of external forcing on marine stratiform clouds over the California Current. The external forcing mechanisms studied during this experiment included ship effects, the effect of the 1991 solar eclipse, and a tropical storm. Our research has shown that ship trails (clouds that form in the wake of ships) can be an important tool in understanding marine cloud/climate feedback mechanisms. A three dimensional turbulence closure model of shiptrail formation showed the importance of a shallow marine boundary layer (about 500 m or less). This was confirmed by our observations. We also found an apparent response of the marine boundary layer to a solar eclipse through lowering temperatures near the ocean and warming near the marine inversion (each about 0.5 C). The effect of the tropical storm was to increase the depth of the boundary layer and cause an associated decrease in the occurrence of ship trail clouds.
4 citations
01 Jul 1995
3 citations
01 Jul 1995
TL;DR: A total eclipse of the Sun will be visible from Asia and the Pacific Ocean on 1997 March 9 as mentioned in this paper, where the path of the Moon's umbral shadow begins in eastern Kazakhstan and travels through Mongolia and eastern Siberia, where it swings northward to end at sunset in the Arctic Ocean.
Abstract: A total eclipse of the Sun will be visible from Asia and the Pacific Ocean on 1997 March 9. The path of the Moon's umbral shadow begins in eastern Kazakhstan and travels through Mongolia and eastern Siberia, where it swings northward to end at sunset in the Arctic Ocean. A partial eclipse will be seen within the much broader path of the Moon's penumbral shadow, which includes eastern Asia, the northern Pacific, and the northwest corner of North America. Detailed predictions for this event are presented and include besselian elements, geographic coordinates of the path of totality, physical ephemeris of the umbra, topocentric limb profile corrections, local circumstances for 280 cities, maps of the eclipse path, weather prospects, the lunar limb profile, and the sky during totality. Tips and suggestions are also given on how to safely view and photograph the eclipse.
3 citations
TL;DR: The synoptic charts of the filaments and active regions near the solar limb are given for the eclipse of November 3, 1994, along with the positions of the prominences.
Abstract: The synoptic charts of the filaments and active regions near the solar limb are given for the eclipse of November 3, 1994, along with the positions of the prominences. A table helps to associate coronal and chromospheric structures.
TL;DR: In this article, a statistical analysis of data collected during observation of a total solar eclipse of July 11, 1991 at Mexico City is presented and the variation of the velocity of the azimuth of the major axis of the pendulum's oscillation ellipse during the eclipse is determined.
Abstract: A statistical analysis of data collected during observation of a total solar eclipse of July 11, 1991 at Mexico City is presented. The variation of the velocity of the azimuth of the major axis of the pendulum's oscillation ellipse during the eclipse is determined and the sudden deviation of the azimuth of the plane of swinging at the start of the eclipse is calculated.
Journal Article•
01 Dec 1995
TL;DR: In this article, the photometry of the solar corona was carried out using both a electropolarimeter (EP) and a CCD matrix, and the standard flattening index ϵ was evaluated from both data.
Abstract: The observational data of the solar corona obtained during the solar eclipse of July 11, 1993, using both a electropolarimeter (EP) and a CCD matrix were processed. Using these data the photometry of the solar corona was carried out. The results of EP data were compared with those of the CCD data. It must be noticed here that the CCD data give us only the characteristics of the inner corona, while the EP data show the features of both the inner and the middle corona up to 4 solar radii.
The standard flattening index ϵ was evaluated from both data. The dependence of ϵ on the distance from the solar limb was investigated. Three-dimensional images of the coronal intensity distribution for different spectral lines are shown. Isophotes in Na and Ca lines with unusual features are plotted. Based on these data some ideas and conclusions on the type of the solar corona and the physical conditions in it are presented.