76
76
Aug 8, 2019
08/19
by
Kovalevsky, Jean
texts
eye 76
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xvi, 375 p. : 24 cm
Topic: Astrometry
4
4.0
Sep 23, 2021
09/21
by
Van de Kamp, Peter, 1901-
texts
eye 4
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xxii, 155 p. : 25 cm
Topic: Astrometry
105
105
Jul 1, 2019
07/19
by
Murray, C. Andrew
texts
eye 105
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comment 0
xi, 353 p. : 24 cm
Topic: Astrometry
28
28
Aug 4, 2019
08/19
by
Podobed, V. V. (Vladimir Vladimirovich)
texts
eye 28
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vii, 236 p. 24 cm
Topic: Astrometry
15
15
Dec 20, 2019
12/19
by
Cooper, W. A. (W. Alan)
texts
eye 15
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comment 0
xii, 293 p. : 24 cm
Topics: Astrophysics, Astrometry
5
5.0
Jul 17, 2020
07/20
by
Cooper, W. A. (W. Alan)
texts
eye 5
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comment 0
xii, 293 p. : 24 cm
Topics: Astrophysics, Astrometry
30
30
Jul 26, 2019
07/19
by
Eichhorn, Heinrich K. (Heinrich Karl), 1927-
texts
eye 30
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xvii, 357 p. 26 cm
Topics: Astrometry, Stars -- Catalogs
566
566
Nov 30, 2009
11/09
by
Förster, Wilhelm Julius, 1832-1921
texts
eye 566
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Book digitized by Google from the library of University of California and uploaded to the Internet Archive by user tpb.
Topics: Astrometry, Space and time
Source: http://books.google.com/books?id=jQtDAAAAIAAJ&oe=UTF-8
Click here to view the University of Florida catalog record
Topics: Hyades, Astrometry, Least squares
7
7.0
Jun 7, 2021
06/21
by
Kovalevsky, Jean
texts
eye 7
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comment 0
vi, 294 pages : 25 cm
Topics: Astrometry, Astrometrie, Astronomie, Astrométrie
8
8.0
Feb 8, 2021
02/21
by
Reunión sobre Astronomía Dinámica en Latino-América (3rd : 2004 : Mérida, Venezuela)
texts
eye 8
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xii, 116 pages : 28 cm
Topics: Celestial mechanics -- Congresses, Astrometry -- Congresses, Astrodynamics -- Congresses,...
4
4.0
texts
eye 4
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comment 0
xi, 427 p. : 24 cm
Topics: Astronomy -- Southern Hemisphere -- Congresses, Astrometry -- Congresses
4
4.0
Apr 23, 2022
04/22
by
International Astronomical Union. Colloquium (111th : 1988 : Lincoln, Neb.)
texts
eye 4
favorite 0
comment 0
vii, 288 p. : 26 cm
Topics: Pulsating stars -- Congresses, Galaxies -- Congresses, Astrometry -- Congresses
13
13
texts
eye 13
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xvii, 339 p. : 26 cm
Topics: Astrometry -- Congresses, Galaxies -- Measurement -- Congresses, Solar system -- Congresses
Source: removedNEL
10
10.0
May 24, 2021
05/21
by
Kitchin, C. R. (Christopher R.)
texts
eye 10
favorite 1
comment 0
xiv, 359 p. : 24 cm
Topics: Astrometry, Interstellar matter -- Measurement, Astrophysics -- Technique, Sun -- Measurement
24
24
Oct 15, 2020
10/20
by
The Carnegie Institution Of Washington
texts
eye 24
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Source: Digital Library of India Scanning Centre: C-DAC, Noida Source Library: I A R I Library Date Accessioned: 6/25/2015 15:53 The Digital Library of India was a project under the auspices of the Government of India.
Topics: Natural Sciences, Astrometry, C-DAC, Noida, DLI Top-Up
2,064
2.1K
May 31, 2011
05/11
by
NON
texts
eye 2,064
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A team was formed to assess NASA Office of Space Science (OSS) information technology research and development activities. These activities were reviewed for their relevance to OSS missions, for their potential for using products better supplied by industry or other government agencies, and for recommending an information technology (IT) infusion strategy for appropriate products for OSS missions. Assessment scope and methodology are presented. IT needs and interests for future OSS missions and...
Topics: ASTROMETRY, GEODESY, VERY LONG BASE INTERFEROMETRY, GROUND STATIONS, REPORTS
1
1.0
Mar 3, 2022
03/22
by
Conference on "Digitised Optical Sky Surveys" (1991 : Edinburgh, Scotland)
texts
eye 1
favorite 0
comment 0
xviii, 524 p. : 25 cm
Topics: Astrometry -- Data processing -- Congresses, Astronomical photometry -- Data processing --...
11
11
texts
eye 11
favorite 0
comment 0
263 p. : 24 cm
Topics: Fluid dynamics -- Congresses, Astrophysics -- Congresses, Nonlinear theories -- Congresses,...
544
544
Jun 12, 2011
06/11
by
Davies, James E.; Moeller, Christopher C.; Gunshor, Mathew M.; Menzel, W. Paul; Walker, Nan D
texts
eye 544
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Terra MODIS 250 m observations are being applied to a Suspended Sediment Concentration (SSC) algorithm that is under development for coastal case 2 waters where reflectance is dominated by sediment entrained in major fluvial outflows. An atmospheric correction based on MODIS observations in the 500 m resolution 1.6 and 2.1 micron bands is used to isolate the remote sensing reflectance in the MODIS 25Om resolution 650 and 865 nanometer bands. SSC estimates from remote sensing reflectance are...
Topics: OCCULTATION, TRITON, PLUTO (PLANET), SATELLITE ATMOSPHERES, PLUTO ATMOSPHERE, ASTROMETRY, KUIPER...
296
296
May 31, 2011
05/11
by
Berthon, Jean-Francoise; Zibordi, Giuseppe; Doyle, John P.; Grossi, Stefania; vanderLinde, Dirk; Targa, Cristin
texts
eye 296
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In this document, the first three years of a time series of bio-optical marine and atmospheric measurements are presented and analyzed. These measurements were performed from an oceanographic tower in the northern Adriatic Sea within the framework of the Coastal Atmosphere and Sea Time Series (CoASTS) project, an ocean color calibration and validation activity. The data set collected includes spectral measurements of the in-water apparent (diffuse attenuation coefficient, reflectance, Q-factor,...
Topics: VERY LONG BASE INTERFEROMETRY, COORDINATION, SCHEDULING, MANAGEMENT PLANNING, ASTROMETRY, GEODESY,...
We present the results of an all-sky survey made with the Fine Guidance Sensor on the Hubble Space Telescope to search for angularly resolved binary systems among massive stars. The sample of 224 stars is comprised mainly of Galactic O- and B-type stars and luminous blue variables, plus a few luminous stars in the Large Magellanic Cloud. The FGS TRANS mode observations are sensitive to the detection of companions with an angular separation between 0 01 and 1 0 and brighter than m = 5. The FGS...
Topics: DTIC Archive, NAVAL OBSERVATORY WASHINGTON DC ASTROMETRY DEPT, *BINARY STARS, STATISTICAL ANALYSIS
3
3.0
Feb 11, 2022
02/22
by
Astrophysics School (4th : 1991 : Graz, Austria)
texts
eye 3
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xi, 293 p. : 24 cm
Topics: Astrophysics -- Technique -- Congresses, Particle acceleration -- Measurement -- Congresses,...
4
4.0
May 5, 2022
05/22
by
International Astronomical Union. Symposium (156th : 1992 : Shanghai, China)
texts
eye 4
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xxxi, 440 p. : 25 cm
Topics: Astrophysics -- Technique -- Congresses, Astrometry -- Congresses, Geodynamics -- Congresses, Very...
Wide field measurements, namely, measurements of relative angular separations between stars over a relatively wide field for parallax and proper motion determinations, were made with the third fine guidance sensor. Narrow field measurements, i.e., double star measurements, are accomplished primarily with the area photometer or faint object camera at f/96. The wavelength range required can be met by the fine guidance sensor which has a spectral coverage from 3000 to 7500 A. The field of view of...
Topics: NASA Technical Reports Server (NTRS), ASTROMETRY, SPACEBORNE TELESCOPES, FILTERS, GUIDANCE...
388
388
May 29, 2011
05/11
by
Miller, Phil; Coleman, Jason; Gemoets, Darren; Hughes, Kevi
texts
eye 388
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This paper describes Web-Altairis, an Internet-enabled ground system software package funded by the Advanced Automation and Architectures Branch (Code 588) of NASA's Goddard Space Flight Center. Web-Altairis supports the trend towards ''lights out'' ground systems, where the control center is unattended and problems are resolved by remote operators. This client/server software runs on most popular platforms and provides for remote data visualization using the rich functionality of the VisAGE...
Topics: INTERFEROMETERS, TELESCOPES, ASTRONOMICAL INTERFEROMETRY, EXTRASOLAR PLANETS, COSMIC DUST,...
517
517
texts
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This report summarizes the results of the NASA Scientific Data Purchase (SDP) program implemented by the Stennis Space Center Earth Science Application Directorate in fiscal years 1998-2002. The SDP was conducted in support of NASA's Mission to Planet Earth (MTPE) program (currently known as NASA's Earth Science Enterprise). This Earth Science Enterprise (ESE) provides major observational capabilities for NASA's Earth system science research and the U.S. Global Change Research Program....
Topics: CATALOGS (PUBLICATIONS), CCD CAMERAS, ASTROMETRY, PARALLAX, MAIN SEQUENCE STARS, ACCURACY,...
454
454
Sep 9, 2010
09/10
by
Johnson, George, 1952 Jan. 20-
texts
eye 454
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Includes bibliographical references (p. 149-150) and index
Topics: Leavitt, Henrietta Swan, 1868-1921, Harvard College Observatory, Astrometry, Women astronomers,...
Source: removedNEL
We report the discovery of the eta Carinae Ghost Shell, a high-velocity, spatially extended emission feature that lies in front of the southeast lobe of the eta Carinae Homunculus. Using data obtained with Kueyen, one of the European Southern Observatory's Very Large Telescope 8.2 m telescopes and its Ultraviolet and Visible Echelle Spectrograph instrument, we have observed a structure in velocity space of width 35 km s(expn -1) and with Doppler velocities ranging from -675 /= v /= -850 km...
Topics: DTIC Archive, NAVAL OBSERVATORY WASHINGTON DC ASTROMETRY DEPT, *STARS, EMISSION, HIGH VELOCITY,...
I will summarize the current status of the SEEDS Moving Group category and describe the importance of this sub-sample for the entire SEEDS survey. This presentation will include analysis of the sensitivity for the Moving Groups with general a comparison to other the other sub-categories. I will discuss the future impact of the Subaru SCExAO system for these targets and the advantage of using a specialized integral field spectrograph. Finally, I will present the impact of a pupil grid mask in...
Topics: NASA Technical Reports Server (NTRS), ASTROMETRY, TELESCOPES, SPECTROGRAPHS, SURVEYS, SENSITIVITY,...
288
288
Jul 11, 2010
07/10
by
Peters, H. E
texts
eye 288
favorite 0
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In house research and development at Goddard Space Flight Center to provide advanced frequency and time standards for the most demanding applications is concentrated primarily in field operable atomic hydrogen masers. Some of the most important goals for the new maser designs have been improved long and short term stability, elimination of the need for auto tuning, increased maser oscillation level, improved hydrogen economy, increased operational life, minimization of operator control or...
Topics: ASTROMETRY, UNIVERSAL TIME, GEODESY, RADIO INTERFEROMETERS, TIME MEASUREMENT, CLOCKS, FREQUENCY...
Some populations of objects in the solar system are still poorly known, and the long-range goal of this program is to improve that situation. For instance, the statistics of Trojan asteroids are uncertain, while previous serveying indicates there is an appreciable systematic difference between the L-4 and L-5 regions, which is hard to explain. Researchers are developing for this goal a new technique of sky surveillance, namely scanning with a charge coupled device (CCD). With its quantum...
Topics: NASA Technical Reports Server (NTRS), ASTEROIDS, ASTROMETRY, CHARGE COUPLED DEVICES, COMETS,...
During the period under review, the main effort of the research supported by this grant was concentrated on Titan, Iapetus, and two comets, Comet Hyakutake and Comet Hale-Bopp. Significant discoveries were made in each case as summarized in the report.
Topics: NASA Technical Reports Server (NTRS), SPECTROSCOPY, TITAN, PLANETS, IAPETUS, ASTROMETRY, HALE-BOPP...
3
3.0
texts
eye 3
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vi, 240 pages : 25 cm
Topics: Astrometry -- Data processing -- Congresses, Astrophysics -- Data processing -- Congresses,...
In this paper we propose a new method for photographic astrometric observations of asteroids. We discuss its advantages and disadvantages and compare them to the advantages and disadvantages of the classical photographic methods. The new method is best suited for observations on a spot where no CCD cameras, blink or stereo comparators are available and when a fast detection of unknown objects is required.
Topics: NASA Technical Reports Server (NTRS), ASTEROIDS, ASTROMETRY, ASTRONOMICAL PHOTOGRAPHY, PHOTOGRAPHIC...
345
345
May 31, 2011
05/11
by
Gutmann, Ethan Dai
texts
eye 345
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There are over 100,000 square kilometers of eolian sand dunes and sand sheets in the High Plains of the central United States. These land-forms may be unstable and may reactivate again as a result of land-use, climate change, or natural climatic variability. The main goal of this thesis was to develop a model that could be used to map an estimate of future dune activity. Multi-temporal calibrated Landsats 5 Thematic Mapper (TM) and 7 Enhanced Thematic Map per Plus (ETM) NDVI imagery were used...
Topics: VERY LONG BASE INTERFEROMETRY, SCHEDULING, COORDINATION, MANAGEMENT PLANNING, LABORATORIES,...
We present the results of an all sky survey for binary systems among the massive stars that we made with the HST Fine Guidance Sensors. The sample of 225 stars is comprised mainly of Galactic O- and B-type stars and Luminous Blue Variables, plus a few luminous stars in the LMC. The FGS TRANS mode observations are sensitive to detection of companions with an angular separation of 0.01 1 arcsec and brighter than m = 5 mag. The FGS observations resolved 52 binary and 6 triple star systems and...
Topics: DTIC Archive, NAVAL OBSERVATORY WASHINGTON DC ASTROMETRY DEPT, *BINARY STARS, OBSERVATION, SKY,...
Obtain physical and astrometric observations of: (1) spacecraft targets to support mission operations; (2) known asteroids with unusual orbits to help determine their origin; and (3) newly discovered minor planets (including both asteroids and comets) that represent a particular opportunity to add significant new knowledge of the Solar System.
Topics: NASA Technical Reports Server (NTRS), OBSERVATION, ASTEROIDS, TARGETS, SOLAR SYSTEM, COMETS,...
As the grant periods overlapped, some of this information below will also be present on the previous final report. During the period May 1 2004 to April 30 2005, approximately 100 NEOs fainter than V = 20 were observed on separate nights from the 1.2-m telescope at Mt. Hopkins. Additionally, a few comets were targeted, including astrometric support of the Deep Impact mission by observing comet P/Tempel 1. Kyle Smalley was again employed as an independent contractor, and he was trained in use of...
Topics: NASA Technical Reports Server (NTRS), ASTROMETRY, NEAR EARTH OBJECTS, TELESCOPES, COMETS, Spahr,...
The Spacewatch Program began as an engineering development of the discovery of near-earth asteroids and comets, with the firs observations starting in 1983, using an RCA charge coupled device (CCD) that has 320 x 512 pixels. Extensive software was written to scan the sky and learn how to do astrometry for precise orbits of newly discovered objects. The merit of the concept was proven, with many observations reported and comets recovered. The precision of astrometric observations for comets and...
Topics: NASA Technical Reports Server (NTRS), ASTEROIDS, ASTROMETRY, CAMERAS, CHARGE COUPLED DEVICES,...
The final report and semiannual reports 1, 2, and 3 in response to the study of 'Planetary System Detection by POINTS' is presented. The grant covered the period from 15 Jun. 1988 through 31 Dec. 1989. The work during that period comprised the further development and refinement of the POINTS concept. The status of the POINTS development at the end of the Grant period was described by Reasenberg in a paper given at the JPL Workshop on Space Interferometry, 12-13 Mar. 1990, and distributed as CfA...
Topics: NASA Technical Reports Server (NTRS), ASTRONOMICAL INTERFEROMETRY, PLANETARY SYSTEMS, SPACEBORNE...
687
687
May 31, 2011
05/11
by
Spomer, Ken A.; Haddock, M. Ree
texts
eye 687
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This paper describes subscale solid-rocket motor hot-fire testing of epoxy adhesives in flame surface bondlines to evaluate heat-affected depth, char depth and ablation rate. Hot-fire testing is part of an adhesive down-selection program on the Space Shuttle Solid Rocket Motor Nozzle to provide additional confidence in the down-selected adhesives. The current nozzle structural adhesive bond system is being replaced due to obsolescence. Prior to hot-fire testing, adhesives were tested for...
Topics: ASTROMETRY, GEODESY, VERY LONG BASE INTERFEROMETRY, REPORTS, RESEARCH AND DEVELOPMENT, PERSONNEL,...
185
185
May 24, 2011
05/11
by
Tsuruta, Sachiko; Kellen, Michae
texts
eye 185
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As a promising model for the X-ray emission from radio-quiet quasars and Seyfert 1 nuclei, we present a nonthermal disk-corona model, where soft photons from a disk are Comptonized by the nonthermal electron-positron pairs in a coronal region above the disk. Various characteristics of our model are qualitatively similar to the homogeneous, spherical, nonthermal pair models previously studied, but the important difference is that in our disk-corona model gamma-ray depletion is far more...
Topics: ASTROMETRY, KUIPER AIRBORNE OBSERVATORY, OCCULTATION, CHARGE COUPLED DEVICES, PHOTOMETRY, CELESTIAL...
The utilization of conventional and VLBI interferometer techniques for accurate determination of UTI, polar motion, and radio source position catalog data is discussed.
Topics: NASA Technical Reports Server (NTRS), ASTROMETRY, INTERFEROMETERS, UNIVERSAL TIME, ACCURACY,...
In this paper we discuss the influence of guiding on the motion of a comet on the derived astrometric position.
Topics: NASA Technical Reports Server (NTRS), ASTROMETRY, COMETS, SPACE OBSERVATIONS (FROM EARTH), COMET...
An array of three radio telescopes on the Moon, separated by 100-1000 km, could measure the positions of compact radio sources 50-100 times more accurately than can be done on Earth. These measurements would form an all-sky reference frame of extreme precision (5-10 micro-arcsec) and stability, with applications to the dynamics of the solar system, our galaxy, and nearby galaxies.
Topics: NASA Technical Reports Server (NTRS), ASTROMETRY, LUNAR OBSERVATORIES, RADIO TELESCOPES, ACCURACY,...
The topics covered include the following: meetings and travel; calibration; GTO Program (Texas); software; subcontractors; and the mini-symposium.
Topics: NASA Technical Reports Server (NTRS), HUBBLE SPACE TELESCOPE, PROJECT MANAGEMENT, ASTROMETRY,...
With the use of narrow field-of-view instrumentation on faint comets, the accuracy requirements upon computed ephemerides are increasing. It is not uncommon for instruments with a one arc minute field-of-view to be tracking a faint comet that is not visible without a substantial integration time. As with all ephemerides of solar syste objects, the computed motion and reduction of these observations, the computed motion of a comet is further depenent upon effects related to the comet's activity....
Topics: NASA Technical Reports Server (NTRS), COMETS, EPHEMERIDES, POSITION (LOCATION), ASTROMETRY,...
The observations of classical Cepheids are reviewed. The main progress that has been made is summarized and some of the problems yet to be solved are discussed. The problems include color excesses, calibration of color, duplicity, ultraviolet colors, temperature-color relations, mass discrepancies, and radius determination.
Topics: NASA Technical Reports Server (NTRS), ASTRONOMY, ASTROPHYSICS, CEPHEID VARIABLES, ASTROMETRY,...
Visual and photographic observations of the brightness of comets are reviewed including methods and sources of errors. Nuclear magnitude estimates are discussed and interpreted in relation to determination of appropriate exposure times for photographic observations. The importance of brightness ephemarides is emphasized.
Topics: NASA Technical Reports Server (NTRS), ASTROMETRY, COMETS, LUMINOSITY, ASTRONOMICAL PHOTOGRAPHY,...
