Results 11 to 20 of about 227 (147)
Scaling slowly rotating asteroids with stellar occultations
Astronomy & Astrophysics, 2023 Context. As evidenced by recent survey results, the majority of asteroids are slow rotators (spin periods longer than 12 h), but lack spin and shape models because of selection bias. This bias is skewing our overall understanding of the spins, shapes, and sizes of asteroids, as well as of their other properties. Also, diameter determinations for large (
A. Marciniak +178 more
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The Planetary Science Journal, 2021 In 2019, the Research and Education Collaborative Occultation Network (RECON) obtained multiple-chord occultation measurements of two Centaur objects: 2014 YY _49 on 2019 January 28 and 2013 NL _24 on 2019 September 4.
Ryder H. Strauss +48 more
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Photographic Observation of Stellar Occultations [PDF]
International Astronomical Union Colloquium, 1988 Stellar occultations are usually observed visually, but this can also be done photographically. Our method has some advantages: –the obtained moments of contacts refer to the smoothed lunar limb,–the error in the determination of contacts is calculable,–the error may be less than in visual work,–the reduction of photographs is fast, due to the ...
A. Tomić, N. Čabrić, V. Čelebonović
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Retrieval of ozone profiles from GOMOS limb scattered measurements [PDF]
Atmospheric Measurement Techniques, 2011 The GOMOS (Global Ozone Monitoring by Occultation of Stars) instrument on board the Envisat satellite measures the vertical composition of the atmosphere using the stellar occultation technique. While the night-time occultations of GOMOS have been proven
S. Tukiainen +7 more
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Global climate model occultation lightcurves tested by August 2018 ground-based stellar occultation [PDF]
Icarus, 2021 Pluto's atmospheric profiles (temperature and pressure) have been studied for decades from stellar occultation lightcurves. In this paper, we look at recent Pluto Global Climate Model (GCM) results (3D temperature, pressure, and density fields) from Bertrand et al.
Chen, Sihe +5 more
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Analysis of inversion error characteristics of stellar occultation simulation data
Earth and Planetary Physics, 2022 Atmospheric stellar occultation observation technology is an advanced space-based detection technology that can measure the vertical distribution of trace gas composition, temperature, and aerosol content in a planet’s atmosphere.
MingChen Sun +3 more
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Retrieval of atmospheric parameters from GOMOS data [PDF]
Atmospheric Chemistry and Physics, 2010 The Global Ozone Monitoring by Occultation of Stars (GOMOS) instrument on board the European Space Agency's ENVISAT satellite measures attenuation of stellar light in occultation geometry.
E. Kyrölä +15 more
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Satellite shadows through stellar occultations
Astronomy & Astrophysics, 2022 Aims. The impact of mega-constellations of satellites in low-Earth orbit during nighttime optical observations is assessed. Methods. Orbital geometry is used to calculate the impact of stellar occultations by satellites on the photometry of individual stars as well as the effect on the photometric calibration of wide-field observations.
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Variable anisotropy of small-scale stratospheric irregularities retrieved from stellar scintillation measurements by GOMOS/Envisat [PDF]
Atmospheric Measurement Techniques, 2014 In this paper, we consider possibilities for studying the anisotropy of small-scale air density irregularities using satellite observations of bi-chromatic stellar scintillations during tangential occultations.
V. Kan, V. F. Sofieva, F. Dalaudier
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Fast CCD Photometry in the Taiwan-America Occultation Survey
Open Astronomy, 2003 We describe the efforts of the Taiwan-America Occultation Survey (TAOS) project to develop a data acquisition and analysis scheme for fast CCD imaging photometry.
Chen W. P. +18 more
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