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Powerful non-geoeffective interplanetary disturbance of July 2012 observed by muon hodoscope URAGAN
Veselovsky, I. S.; Astapov, I. I.; Barbashina, N. S. +2 more
The most powerful coronal mass ejection of the 24th solar cycle took place on the opposite side of the Sun on July 23, 2012 and had no geomagnetic consequences. Nevertheless, as a result of passing of the ejection through the heliosphere, variations of galactic cosmic rays flux were observed on the Earth. These variations were registered by the mu…
Counter data of the Cosmic Dust Analyzer aboard the Cassini spacecraft and possible “dust clouds” at Saturn
Grün, Eberhard; Srama, Ralf; Khalisi, Emil
We present the impact rates of dust particles recorded by the Cosmic Dust Analyzer (CDA) aboard the Cassini spacecraft. The “dust counters” evaluate the quality of an impact and give rise to the apparent density of dust particles in space.
The raw data is pre-selected and refined to a new structure that serves to a better investigation of den…Influence of the lunar ambience on dynamic surface hydration on sunlit regions of the Moon
Califorrniaa, E.
The accepted paradigm of a dry Moon has been upset by the recent detection of a wet Moon. EPOXI, NASA's extended mission for the Deep Impact spacecraft, observed and quantified dynamic surface hydration on sunlit regions of the Moon by infrared spectrometry in separate flybys. MIP CHACE, released from ISRO's Chandrayaan-1 spacecraft, detected H
Comparison of measured and calculated magnetic fields along the Ulysses orbit
Bazilevskaya, G. A.; Svirzhevsky, N. S.; Svirzhevskaya, A. K. +1 more
The existence of close relations between the temperature, density and velocity of the solar plasma and the heliospheric magnetic field (HMF) was shown along the space probe Ulysses orbit. A simple mathematical formula describing a relation between the HMF and the solar plasma temperature and density was introduced and the expected values of the HM…
End-of-life disposal of libration point orbit missions: The case of Gaia
Armellin, Roberto; Rasotto, Mirco; Di Lizia, Pierluigi +1 more
This work investigates end of life disposal options for libration point orbit missions. Three different options are presented: the first one considers spacecraft's re-entry in Earth's atmosphere, the second one concerns the impact on the Moon, whereas the third one consists in the injection of the spacecraft into a heliocentric graveyard orbit. Th…
Shock wave driven by CME evidenced by metric type II burst and EUV wave
Selhorst, C. L.; Cunha-Silva, R. D.; Fernandes, F. C. R.
Solar type II radio bursts are produced by plasma oscillations in the solar corona as a result of shock waves. The relationship between type II bursts and coronal shocks is well evidenced by observations since the 1960s. However, the drivers of the shocks associated with type II events at metric wavelengths remain as a controversial issue among so…
Hybrid method for crater detection based on topography reconstruction from optical images and the new LU78287GT catalogue of Lunar impact craters
Lončarić, Sven; Wöhler, Christian; Salamunićcar, Goran +1 more
Impact craters are ubiquitous and well-studied structures of high geological relevance on the surfaces of the Earth's Moon, the terrestrial planets, the asteroids and the satellites of the outer planets. Therefore, it is not surprising that crater detection algorithms (CDAs) are one of the most studied subjects of image processing and analysis in …
Integrated method for crater detection from topography and optical images and the new PH9224GT catalogue of Phobos impact craters
Lončarić, Sven; Salamunićcar, Goran; Pina, Pedro +2 more
In a large majority of lunar and planetary surface images, impact craters are the most abundant geological features. Therefore, it is not surprising that crater detection algorithms (CDAs) are one of the most studied subjects of image processing and analysis in lunar and planetary science. In this work we are proposing an Integrated CDA, consistin…
Solar X-ray Monitor (XSM) on-board Chandrayaan-2 orbiter
Shanmugam, M.; Vadawale, S. V.; Acharya, Y. B. +6 more
The remote X-ray fluorescence spectroscopy is a powerful technique to investigate the elemental abundances in the atmosphere-less planetary bodies. The experiment involves measuring spectra of fluorescent X-rays from lunar surface using a low energy X-ray detector onboard an orbiting satellite. Since the flux of fluorescent X-ray lines critically …
The role of ultraviolet imaging in studies of resolved and unresolved young stellar populations. M31 and M33
Bianchi, Luciana; Hodge, Paul; Williams, Benjamin +2 more
We discuss the relevance of UV data in the detection and characterization of hot massive stars and young stellar populations in galaxies. We show results from recent extensive surveys in M31 and M33 with Hubble Space Telescope (HST) multi-wavelength data including UV filters, which imaged several regions at a linear resolution (projected) of less …