Results 11 to 20 of about 14,635 (238)
Address Delivered by the President, Dr. H. Spencer Jones, on Some Problems of Meridian Astronomy [PDF]
Monthly Notices of the Royal Astronomical Society, 1939 openaire +2 more sources
A SYNTHESIS OF TEMPORAL VARIATIONS IN DOPPLER SPECTRA RECORDED AT A QUASI-VERTICAL INCIDENCE BY THE HF DOPPLER RADAR WITH SPACED RECEIVERS [PDF]
Radio Physics and Radio Astronomy, 2021 Purpose: The ionospheric channel is widely used for the communication, radio navigation, radar, direction finding, radio astronomy, and remote radio probing systems.
V. F. Pushin, L. F. Chernogor
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Meridian Circle Astrometry at the U. S. Naval Observatory
Cahiers François Viète, 2023 For 150 years meridian circles have played an essential part in the mission of the U. S. Naval Observatory (USNO) in its dual role as a naval observatory, in support of celestial navigation, and as a national observatory, improving the celestial ...
Richard E. Schmidt, Steven J. Dick
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Cahiers François Viète, 2023 The nineteenth-century press devoted important attention to science, and to astronomy, for many different reasons. This paper surveys public representations of meridian circles and other core instruments such as transit instruments and equatorial ...
David Aubin
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CLASS Observations of Atmospheric Cloud Polarization at millimeter Wavelengths
The Astrophysical Journal, 2023 The dynamic atmosphere imposes challenges to ground-based cosmic microwave background observation, especially for measurements on large angular scales.
Yunyang Li +24 more
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Mid-latitude Geomagnetic Field Analysis Using BOH Magnetometer: Preliminary Results [PDF]
Journal of Astronomy and Space Sciences, 2011 Korea Astronomy and Space Science Institute researchers have installed and operated magnetometers at Mt. Bohyun Observatory to measure the Earth's magnetic field variations in South Korea.
Junga Hwang +4 more
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Halo-coronal mass ejections near the 23rd solar minimum: lift-off, inner heliosphere, and in situ (1 AU) signatures [PDF]
Annales Geophysicae, 2002 The extreme ultraviolet (EUV) signatures of a solar lift-off, decametric and kilometric radio burst emissions and energetic particle (EP) inner heliospheric signatures of an interplanetary shock, and in situ identification of its driver through ...
D. B. Berdichevsky +13 more
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In Situ, 2009 This article opens with some general remarks on the principles of restoring scientific instruments and on the presentation of the restoration policies of the Brazilian museum of astronomy (MAST).
Marcus Granato +1 more
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L’inventaire et le patrimoine de l’astronomie : l’exemple des cercles méridiens et de leurs abris
In Situ, 2012 Although it was first designed at the beginning of the eighteenth century, the meridian circle only really began to equip astronomical observatories around 1850.
Françoise Le Guet-Tully +1 more
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The History of Astrometry [PDF]
, 2012 The history of astrometry, the branch of astronomy dealing with the positions of celestial objects, is a lengthy and complex chronicle, having its origins in the earliest records of astronomical observations more than two thousand years ago, and ...
Perryman, Michael
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