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  • Other Sources  (10)
  • 2000-2004  (5)
  • 1985-1989  (5)
  • 1965-1969
  • 1960-1964
  • 1955-1959
  • 2003  (5)
  • 1988  (5)
  • 1
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    In:  Bull. Seismol. Soc. Am., Bonn, Pergamon, vol. 93, no. 3, pp. 986-997, pp. 1990, (ISBN: 0534351875, 2nd edition)
    Publication Date: 2003
    Keywords: Layers ; Shear waves ; Seismics (controlled source seismology) ; Velocity depth profile ; Physical properties of rocks ; USA ; noksp ; BSSA
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  • 2
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    In:  Bull. Seism. Soc. Am., Warszawa, Conseil de l'Europe, vol. 93, no. 5, pp. 2306-2316, pp. L12S07, (ISBN: 0-12-018847-3)
    Publication Date: 2003
    Keywords: Three dimensional ; Site amplification ; Data analysis / ~ processing ; BSSA ; Chavez ; Garcia
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  • 3
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    In:  Bulletin of the Seismological Society of America, Bonn, Pergamon, vol. 93, no. 3, pp. 986-987, pp. 1990, (ISBN: 0534351875, 2nd edition)
    Publication Date: 2003
    Keywords: Seismology ; Shear waves ; Velocity ; Velocity depth profile ; USA ; BSSA
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  • 4
    Publication Date: 2003
    Description: Zusammenhang zwischen der Niederschlagshöhe und der Nord-Atlantischen Oszillationen und ihre Auswirkungen auf Weizenqualität KATASTER-BESCHREIBUNG: Die Nord-Atlantische Oszillationen in einem um 6 Monate vorgezogenen Zeitfenster im Winter beeinflusst die Höhe der Niederschläge im darauffolgenden Sommer und damit die Weizenqualität, schwach signifikanter Zusammenhang für die trockensten und die feuchtesten Sommer für alle Regionen im Vereinten Königreich, aber auch für große Teile Westeuropas und Skandinaviens KATASTER-DETAIL:
    Keywords: England und Schottland ; 1985-2000 und 1977-2000 ; Ertrag ; Niederschlag ; Weizen
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  • 5
    Publication Date: 2011-08-19
    Description: Solar eclipse timings measured between A.D. 1672 and 1806 are analyzed to study the variation of Delta T (= ET - UT) over this interval. These solar eclipse observations confirm the results of Brouwer (1952), Martin (1969), and Stephenson and Morrison (1969) which were obtained from the analysis of occultations in this period. It is believed that Goldstein's (1985) analysis inadequately represents the changes in Delta T.
    Keywords: GEOPHYSICS
    Type: Astronomy and Astrophysics (ISSN 0004-6361); 200; 1-2,
    Format: text
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  • 6
    Publication Date: 2011-08-19
    Description: Recent ice velocity measurements on the major Antarctic Ice Stream B are compared with those collected 10 years ago. The results show that the ice flow in the mouth of Ice Stream B has decelerated by about 20 percent. The possible causes of this deceleration are discussed on the basis of present knowledge of current regional dynamics, and the possible effects of this deceleration on future ice stream behavior are examined.
    Keywords: GEOPHYSICS
    Type: Nature (ISSN 0028-0836); 334; 695-697
    Format: text
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  • 7
    Publication Date: 2019-06-28
    Description: This report presents data collected during three field seasons of glaciological studies in the Antarctica and describes the methods employed. The region investigated covers the mouths of Ice Streams B and C (the Siple Coast) and Crary Ice Rise on the Ross Ice Shelf. Measurements included in the report are as follows: surface velocity and deformation from repeated satellite geoceiver positions; surface topography from optical levelling; radar sounding of ice thickness; accumulation rates; near-surface densities and temperature profiles; and mapping from aerial photography.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-100708 , NAS 1.15:100708 , REPT-88B-0214
    Format: application/pdf
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  • 8
    Publication Date: 2019-08-27
    Description: The NASA Earth-to-Orbit (ETO) Propulsion Technology Program is dedicated to advancing rocket engine technologies for the development of fully reusable engine systems that will enable space transportation systems to achieve low cost, routine access to space. The program addresses technology advancements in the areas of engine life extension/prediction, performance enhancements, reduced ground operations costs, and in-flight fault tolerant engine operations. The primary objective is to acquire increased knowledge and understanding of rocket engine chemical and physical processes in order to evolve more realistic analytical simulations of engine internal environments, to derive more accurate predictions of steady and unsteady loads, and using improved structural analyses, to more accurately predict component life and performance, and finally to identify and verify more durable advanced design concepts. In addition, efforts were focused on engine diagnostic needs and advances that would allow integrated health monitoring systems to be developed for enhanced maintainability, automated servicing, inspection, and checkout, and ultimately, in-flight fault tolerant engine operations.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA, Marshall Space Flight Center, Advanced Earth-to-Orbit Propulsion Technology 1988, Volume 1; p 5-19
    Format: application/pdf
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  • 9
    Publication Date: 2019-07-13
    Description: Space Shuttle Orbiters are likely to remain in service to 2020 or beyond for servicing the International Space Station and for launching very high value spacecraft. There is a need for a new STS-deployable upper stage that can boost certain Orbiter payloads to higher energy orbits, up to and including Earth-escape trajectories. The inventory of solid rocket motor Inertial Upper Stages has been depleted, and it is unlikely that a LOX/LH2-fueled upper stage can fly on Shuttle due to safety concerns. This paper summarizes the results of a study that investigated a low cost, low risk approach to quickly developing a new large upper stage optimized to fly on the existing Shuttle fleet. Two design reference missions (DRMs) were specified: the James Webb Space Telescope (JWST) and the Space Interferometry Mission (SIM). Two categories of upper stage propellants were examined in detail: a storable liquid propellant and a storable gel propellant. Stage subsystems 'other than propulsion were based largely on heritage hardware to minimize cost, risk and development schedule span. The paper presents the ground rules and guidelines for conducting the study, the preliminary conceptual designs margins, assessments of technology readiness/risk, potential synergy with other programs, and preliminary estimates of development and production costs and schedule spans. Although the Orbiter Columbia was baselined for the study, discussion is provided to show how the results apply to the remaining STS Orbiter fleet.
    Keywords: Spacecraft Propulsion and Power
    Type: AIAA Paper 2003-5128 , 39th AIAA Joint propulsion Conference and Exhibit; Jul 20, 2003 - Jul 23, 2003; Huntsville, AL; United States
    Format: application/pdf
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  • 10
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    Unknown
    In:  Other Sources
    Publication Date: 2019-07-13
    Description: Research concerning flight computers for use on interplanetary probes is reviewed. The history of these computers from the Viking mission to the present is outlined. The differences between ground commercial computers and computers for planetary exploration are listed. The development of a computer for the Mariner Mark II comet rendezvous asteroid flyby mission is described. Various aspects of recently developed computer systems are examined, including the Max real time, embedded computer, a hypercube distributed supercomputer, a SAR data processor, a processor for the High Resolution IR Imaging Spectrometer, and a robotic vision multiresolution pyramid machine for processsing images obtained by a Mars Rover.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: International Symposium on Space Technology and Science; May 22, 1988 - May 27, 1988; Sapporo; Japan
    Format: text
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