Results 21 to 30 of about 2,627,055 (211)

The Mastcam‐Z Radiometric Calibration Targets on NASA's Perseverance Rover: Derived Irradiance Time‐Series, Dust Deposition, and Performance Over the First 350 Sols on Mars

Earth and Space Science, Volume 9, Issue 12, December 2022., 2022
Abstract The Mastcam‐Z radiometric calibration targets mounted on the NASA's Perseverance rover proved to be effective in the calibration of Mastcam‐Z images to reflectance (I/F) over the first 350 sols on Mars. Mastcam‐Z imaged the calibration targets regularly to perform reflectance calibration on multispectral image sets of targets on the Martian ...
M. Merusi, K. B. Kinch, M. B. Madsen, J. F. Bell III, J. N. Maki, A. G. Hayes, J. Joseph, J. R. Johnson, M. Rice, E. A. Cloutis, D. Applin, M. T. Lemmon, A. F. Vaughan, J. I. Núñez, E. Jensen, J. Z. Kristensen, K. Paris, E. Cisneros, M. R. Kennedy, O. Gasnault   +19 more
wiley   +1 more source

Stream‐Lake Connectivity Is an Important Control of Fluvial CO2 Concentrations and Emissions in Catchments

Earth and Space Science, Volume 9, Issue 12, December 2022., 2022
Abstract Streams in cultivated lowlands are commonly supersaturated with CO2 and are a source of CO2 to the atmosphere. Great uncertainties exist regarding the spatiotemporal variations of CO2 concentrations and emission rates in stream‐lake fluvial networks and small streams with variable plant cover.
Kaj Sand‐Jensen, Tenna Riis, Johan Emil Kjær, Kenneth Thorø Martinsen   +3 more
wiley   +1 more source

A Proper Use of the Adjacent Land‐Based Observatory Magnetic Field Data to Account for the Geomagnetic Disturbances During Offshore Directional Drilling

Space Weather, Volume 20, Issue 12, December 2022., 2022
Abstract Directional drilling in the oil fields relies particularly on the “on‐fly” measurements of the natural magnetic field (measurements while drilling; MWD); the MWD are eventually used to construct the well path. These measurements are the superposition of the signals from the internal, core and crustal, and external, ionospheric and ...
Mikhail Kruglyakov, Alexey Kuvshinov, Manoj Nair   +2 more
wiley   +1 more source

Vlasov methods in space physics and astrophysics [PDF]

Living Reviews in Computational Astrophysics, 2018
This paper reviews Vlasov-based numerical methods used to model plasma in space physics and astrophysics. Plasma consists of collectively behaving charged particles that form the major part of baryonic matter in the Universe.
M. Palmroth, U. Ganse, Y. Pfau‐Kempf, M. Battarbee, L. Turc, T. Brito, M. Grandin, S. Hoilijoki, A. Sandroos, S. von Alfthan   +9 more
semanticscholar   +2 more sources

Rossby Waves in Astrophysics

Space Science Reviews, 2021
Rossby waves are a pervasive feature of the large-scale motions of the Earth’s atmosphere and oceans. These waves (also known as planetary waves and r-modes) also play an important role in the large-scale dynamics of different astrophysical objects such ...
T. V. Zaqarashvili, M. Albekioni, J. Ballester, Y. Bekki, L. Biancofiore, A. Birch, M. Dikpati, L. Gizon, E. Gurgenashvili, E. Heifetz, Antonino Francesco Lanza, S. McIntosh, L. Ofman, R. Oliver, B. Proxauf, O. Umurhan, R. Yellin-Bergovoy   +16 more
semanticscholar   +1 more source

High precision astrometry mission for the detection and characterization of nearby habitable planetary systems with the Nearby Earth Astrometric Telescope (NEAT) [PDF]

Experimental astronomy (Print), 2011
A complete census of planetary systems around a volume-limited sample of solar-type stars (FGK dwarfs) in the Solar neighborhood (d ≤ 15 pc) with uniform sensitivity down to Earth-mass planets within their Habitable Zones out to several AUs would be a ...
F. Malbet, A. Léger, M. Shao, R. Goullioud, P. Lagage, Anthony G. A. Brown, C. Cara, G. Durand, C. Eiroa, P. Feautrier, B. Jakobsson, E. Hinglais, L. Kaltenegger, L. Labadie, A. Lagrange, J. Laskar, R. Liseau, J. Lunine, J. Maldonado, M. Mercier, C. Mordasini, D. Queloz, A. Quirrenbach, A. Sozzetti, W. Traub, O. Absil, Y. Alibert, A. Andrei, Frédéric Arenou, C. Beichman, A. Chelli, C. Cockell, G. Duvert, T. Forveille, P. Garcia, D. Hobbs, A. Krone-Martins, H. Lammer, N. Meunier, S. Minardi, André Moitinho de Almeida, N. Rambaux, S. Raymond, H. Röttgering, J. Sahlmann, P. Schuller, D. Ségransan, F. Selsis, J. Surdej, E. Villaver, G. White, H. Zinnecker   +51 more
semanticscholar   +2 more sources

Transmission Spectroscopy of the Earth–Sun System to Inform the Search for Extrasolar Life [PDF]

, 2021
Upcoming NASA astrophysics missions such as the James Webb Space Telescope will search for signs of life on planets transiting nearby stars. Doing so will require coadding dozens of transmission spectra to build up sufficient signal to noise while ...
L. Mayorga, J. Lustig-Yaeger, E. May, K. Sotzen, Junellie Gonzalez-Quiles, B. Kilpatrick, E. Martin, K. Mandt, K. Stevenson, N. Izenberg   +9 more
semanticscholar   +1 more source

Venus as an anchor point for planetary habitability [PDF]

Nature Astronomy
A major focus of the planetary science and astrobiology community is the understanding of planetary habitability, including the myriad factors that control the evolution and sustainability of temperate surface environments such as that of Earth.
Stephen R. Kane, Paul K. Byrne
semanticscholar   +1 more source

Super-Earth of 8 M⊕ in a 2.2-day orbit around the K5V star K2-216 [PDF]

Astronomy & Astrophysics, 2018
Context. Although thousands of exoplanets have been discovered to date, far fewer have been fully characterised, in particular super-Earths. The KESPRINT consortium identified K2-216 as a planetary candidate host star in the K2 space mission Campaign 8 ...
C. Persson, M. Fridlund, O. Barrag'an, F. Dai, D. Gandolfi, A. Hatzes, T. Hirano, S. Grziwa, J. Korth, J. Prieto-Arranz, L. Fossati, V. V. Eylen, A. B. Justesen, J. Livingston, D. Kubyshkina, H. Deeg, E. Guenther, G. Nowak, J. Cabrera, P. Eigmüller, S. Csizmadia, Andra M. Smith, A. Erikson, S. Albrecht, A. Sobrino, W. Cochran, M. Endl, Massimiliano Esposito, A. Fukui, P. Heeren, D. Hidalgo, M. Hjorth, M. Kuzuhara, N. Narita, D. Nespral, E. Pallé, M. Pätzold, H. Rauer, F. Rodler, J. Winn   +39 more
semanticscholar   +1 more source

THE CHANDRA X-RAY SURVEY OF PLANETARY NEBULAE (ChanPlaNS): PROBING BINARITY, MAGNETIC FIELDS, AND WIND COLLISIONS [PDF]

, 2012
We present an overview of the initial results from the Chandra Planetary Nebula Survey (ChanPlaNS), the first systematic (volume-limited) Chandra X-Ray Observatory survey of planetary nebulae (PNe) in the solar neighborhood.
J. Kastner, R. Montez, B. Balick, D. Frew, B. Miszalski, R. Sahai, E. Blackman, Y. Chu, O. Marco, A. Frank, M. Guerrero, J. López, V. Rapson, A. Zijlstra, E. Behar, V. Bujarrabal, R. Corradi, J. Nordhaus, Q. Parker, C. Sandin, D. Schonberner, N. Soker, J. Sokoloski, M. Steffen, T. Ueta, E. Science, Laboratory for Multiwavelength Astrophysics, R. I. O. Technology, D. Astronomy, U. Washington, D. Physics, Astronomy, M. R. C. F. Astronomy, Astrophysics, Astrophotonics, M. University, South African astronomical Observatory, Southern African Large Telescope Foundation, Jet propulsion Laboratory, C. I. O. Technology., D. Physics, U. Rochester, U. Illinois, I. D. Astronom'ia, Glorieta de la Astronom'ia sn, I. D. Astronomía, Universidad Autonoma de Mexico, S. O. Physics, U. Manchester, Technion, Israel, O. Nacional, A. Henares, Spain., Instituto de Astrof'isica de Canarias, Tenerife, D. Astrof'isica, U. L. Laguna, N. Astronomy, A. Fellow, Center for Computational Relativity, Gravitation, Leibniz Institute for Astrophysics Potsdam, Columbia Astrophysics Laboratory, Columbia University, U. Denver, Departamento de F'isica Te'orica, U. A. D. Madrid   +67 more
semanticscholar   +1 more source