Institution
Canadian Space Agency
Government•Longueuil, Quebec, Canada•
About: Canadian Space Agency is a government organization based out in Longueuil, Quebec, Canada. It is known for research contribution in the topics: Control theory & Robot. The organization has 751 authors who have published 1323 publications receiving 27942 citations. The organization is also known as: CSA & Canadian Space Agency、 CSA.
Topics: Control theory, Robot, Mars Exploration Program, Spacecraft, Torque
Papers published on a yearly basis
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University of Waterloo1, Meteorological Service of Canada2, University of Paris3, Université libre de Bruxelles4, NASA Headquarters5, Belgian Institute for Space Aeronomy6, University of Toronto7, Trent University8, University of Western Ontario9, Goddard Space Flight Center10, University of Saskatchewan11, York University12, Canadian Space Agency13, Langley Research Center14, Laval University15, At Bristol16
TL;DR: The Atmospheric Chemistry Experiment (ACE) is a Canadian satellite mission for remote sensing of the Earth's atmosphere that was launched into low Earth circular orbit (altitude 650 km, inclination 74°) on 12 Aug. 2003.
Abstract: SCISAT-1, also known as the Atmospheric Chemistry Experiment (ACE), is a Canadian satellite mission for remote sensing of the Earth's atmosphere. It was launched into low Earth circular orbit (altitude 650 km, inclination 74°) on 12 Aug. 2003. The primary ACE instrument is a high spectral resolution (0.02 cm-1) Fourier Transform Spectrometer (FTS) operating from 2.2 to 13.3 μm (750-4400 cm-1). The satellite also features a dual spectrophotometer known as MAESTRO with wavelength coverage of 285-1030 nm and spectral resolution of 1-2 nm. A pair of filtered CMOS detector arrays records images of the Sun at 0.525 and 1.02 μm. Working primarily in solar occultation, the satellite provides altitude profile information (typically 10-100 km) for temperature, pressure, and the volume mixing ratios for several dozen molecules of atmospheric interest, as well as atmospheric extinction profiles over the latitudes 85°N to 85°S. This paper presents a mission overview and some of the first scientific results. Copyright 2005 by the American Geophysical Union.
807 citations
California Institute of Technology1, University of California, Davis2, University of Tennessee3, Imperial College London4, Arizona State University5, United States Geological Survey6, Princeton University7, Indiana University8, University of Nantes9, Brown University10, Goddard Space Flight Center11, Ames Research Center12, State University of New York System13, Jacobs Engineering Group14, Planetary Science Institute15, University of Guelph16, Los Alamos National Laboratory17, University of Toulouse18, Smithsonian Institution19, Washington University in St. Louis20, University of Washington21, University of California, Berkeley22, University of Lyon23, University of Texas at Austin24, Rensselaer Polytechnic Institute25, Canadian Space Agency26, NASA Headquarters27, University of New Mexico28, University of Hawaii at Manoa29, Brock University30, Cornell University31, Carnegie Institution for Science32, Massachusetts Institute of Technology33, Lunar and Planetary Institute34
TL;DR: The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of an environment that would have been suited to support a martian biosphere founded on chemolithoautotrophy.
Abstract: The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of an environment that would have been suited to support a martian biosphere founded on chemolithoautotrophy. This aqueous environment was characterized by neutral pH, low salinity, and variable redox states of both iron and sulfur species. Carbon, hydrogen, oxygen, sulfur, nitrogen, and phosphorus were measured directly as key biogenic elements; by inference, phosphorus is assumed to have been available. The environment probably had a minimum duration of hundreds to tens of thousands of years. These results highlight the biological viability of fluvial-lacustrine environments in the post-Noachian history of Mars.
770 citations
University of Arizona1, California Institute of Technology2, Washington University in St. Louis3, Optech4, University of Bristol5, University of Washington6, Space Science Institute7, Dalhousie University8, University of Ottawa9, Max Planck Society10, Aarhus University11, Canadian Space Agency12, University of Texas at Dallas13, Tufts University14, University of Alberta15, Texas A&M University16, University of Copenhagen17, Search for extraterrestrial intelligence18, Ames Research Center19, University of Colorado Boulder20, University of Michigan21, Imperial College London22, Delft University of Technology23, York University24
TL;DR: The analysis of the data from the Phoenix mission revealed an alkaline environment, in contrast to that found by the Mars Exploration Rovers, indicating that many different environments have existed on Mars.
Abstract: The Phoenix mission investigated patterned ground and weather in the northern arctic region of Mars for 5 months starting 25 May 2008 (solar longitude between 76.5° and 148°). A shallow ice table was uncovered by the robotic arm in the center and edge of a nearby polygon at depths of 5 to 18 centimeters. In late summer, snowfall and frost blanketed the surface at night; H2O ice and vapor constantly interacted with the soil. The soil was alkaline (pH = 7.7) and contained CaCO3, aqueous minerals, and salts up to several weight percent in the indurated surface soil. Their formation likely required the presence of water.
503 citations
TL;DR: A new denoising method is proposed for hyperspectral data cubes that already have a reasonably good signal-to-noise ratio (SNR) (such as 600 : 1), using principal component analysis (PCA) and removing the noise in the low-energy PCA output channels.
Abstract: In this paper, a new denoising method is proposed for hyperspectral data cubes that already have a reasonably good signal-to-noise ratio (SNR) (such as 600 : 1). Given this level of the SNR, the noise level of the data cubes is relatively low. The conventional image denoising methods are likely to remove the fine features of the data cubes during the denoising process. We propose to decorrelate the image information of hyperspectral data cubes from the noise by using principal component analysis (PCA) and removing the noise in the low-energy PCA output channels. The first PCA output channels contain a majority of the total energy of a data cube, and the rest PCA output channels contain a small amount of energy. It is believed that the low-energy channels also contain a large amount of noise. Removing noise in the low-energy PCA output channels will not harm the fine features of the data cubes. A 2-D bivariate wavelet thresholding method is used to remove the noise for low-energy PCA channels, and a 1-D dual-tree complex wavelet transform denoising method is used to remove the noise of the spectrum of each pixel of the data cube. Experimental results demonstrated that the proposed denoising method produces better denoising results than other denoising methods published in the literature.
374 citations
Aarhus University1, Yale University2, Space Telescope Science Institute3, INAF4, University of Vienna5, Iowa State University6, High Altitude Observatory7, University of Wrocław8, University of Porto9, University of La Laguna10, Spanish National Research Council11, Homi Bhabha National Institute12, Ohio State University13, Romanian Academy14, Canadian Space Agency15, Max Planck Society16, Ames Research Center17, Las Cumbres Observatory Global Telescope Network18
TL;DR: It is found that the distribution of observed masses of these stars shows intriguing differences to predictions from models of synthetic stellar populations in the Galaxy.
Abstract: In addition to its search for extrasolar planets, the NASA Kepler mission provides exquisite data on stellar oscillations. We report the detections of oscillations in 500 solar-type stars in the Kepler field of view, an ensemble that is large enough to allow statistical studies of intrinsic stellar properties (such as mass, radius, and age) and to test theories of stellar evolution. We find that the distribution of observed masses of these stars shows intriguing differences to predictions from models of synthetic stellar populations in the Galaxy.
362 citations
Authors
Showing all 752 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Vincent Hayward | 61 | 327 | 12025 |
| John M. Hollerbach | 53 | 196 | 14154 |
| Sandra C. Chapman | 45 | 321 | 7662 |
| Gordon R. Osinski | 41 | 324 | 5552 |
| Raafat R. Mansour | 41 | 482 | 7925 |
| Sylvain Martel | 36 | 264 | 6500 |
| K. Wayne Johnston | 35 | 86 | 5588 |
| Ioannis Rekleitis | 34 | 132 | 3720 |
| Vincent Motto-Ros | 32 | 98 | 2682 |
| Sarah Gallagher | 30 | 78 | 2821 |
| Denis Lacelle | 29 | 84 | 2310 |
| Glenn H. Chapman | 26 | 227 | 2774 |
| Guangyi Chen | 25 | 83 | 2447 |
| Farhad Aghili | 25 | 131 | 2251 |
| Pedro Gregorio | 25 | 44 | 3317 |