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  • ASTROPHYSICS  (137)
  • EARTH RESOURCES AND REMOTE SENSING  (45)
  • ENERGY PRODUCTION AND CONVERSION
  • METEOROLOGY AND CLIMATOLOGY
  • 1985-1989  (232)
  • 1980-1984
  • 1970-1974
  • 1945-1949
  • 1988  (232)
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Keywords
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  • 1985-1989  (232)
  • 1980-1984
  • 1970-1974
  • 1945-1949
Year
  • 1
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    Toward a descriptive model of solar particles in the heliosphere (1988)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: During a workshop on the interplanetary charged particle environment held in 1987, a descriptive model of solar particles in the heliosphere was assembled. This model includes the fluence, composition, energy spectra, and spatial and temporal variations of solar particles both within and beyong 1 AU. The ability to predict solar particle fluences was also discussed. Suggestions for specific studies designed to improve the basic model were also made.
    Keywords: ASTROPHYSICS
    Type: Interplanetary Particle Environment. Proceedings of a Conference; p 3-13
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    MODIS information, data and control system (MIDACS) operations concepts (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The MODIS Information, Data, and Control System (MIDACS) Operations Concepts Document provides a basis for the mutual understanding between the users and the designers of the MIDACS, including the requirements, operating environment, external interfaces, and development plan. In defining the concepts and scope of the system, how the MIDACS will operate as an element of the Earth Observing System (EOS) within the EosDIS environment is described. This version follows an earlier release of a preliminary draft version. The individual operations concepts for planning and scheduling, control and monitoring, data acquisition and processing, calibration and validation, data archive and distribution, and user access do not yet fully represent the requirements of the data system needed to achieve the scientific objectives of the MODIS instruments and science teams. The teams are not yet formed; however, it is possible to develop the operations concepts based on the present concept of EosDIS, the level 1 and level 2 Functional Requirements Documents, and through interviews and meetings with key members of the scientific community. The operations concepts were exercised through the application of representative scenarios.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-100720 , REPT-89B00065 , NAS 1.15:100720
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    MODIS information, data and control system (MIDACS) level 2 functional requirements (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The MODIS Information, Data and Control System (MIDACS) Level 2 Functional Requirements Document establishes the functional requirements for MIDACS and provides a basis for the mutual understanding between the users and the designers of the EosDIS, including the requirements, operating environment, external interfaces, and development plan. In defining the requirements and scope of the system, this document describes how MIDACS will operate as an element of the EOS within the EosDIS environment. This version of the Level 2 Requirements Document follows an earlier release of a preliminary draft version. The sections on functional and performance requirements do not yet fully represent the requirements of the data system needed to achieve the scientific objectives of the MODIS instruments and science teams. Indeed, the team members have not yet been selected and the team has not yet been formed; however, it has been possible to identify many relevant requirements based on the present concept of EosDIS and through interviews and meetings with key members of the scientific community. These requirements have been grouped by functional component of the data system, and by function within each component. These requirements have been merged with the complete set of Level 1 and Level 2 context diagrams, data flow diagrams, and data dictionary.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-100719 , REPT-89B00065 , NAS 1.15:100719
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    ER-2 lidar observations from the October 1986 fire cirrus experiment (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A description of the ER-2 lidar data characteristics and available products, plus flight times and locations is presented for the FIRE cirrus experiment of October 13 through November 2, 1986. The CALS airborne lidar was flown for this experiment on the NASA ER-2 high altitude aircraft. The primary objectives of the CALS observations were to intensively measure cirrus cloud top height and structure for basic cirrus studies and for validation of satellite cloud retrievals.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-TM-100704 , NAS 1.15:100704
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    MODIS Information, Data, and Control System (MIDACS) system specifications and conceptual design (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The MODIS Information, Data, and Control System (MIDACS) Specifications and Conceptual Design Document discusses system level requirements, the overall operating environment in which requirements must be met, and a breakdown of MIDACS into component subsystems, which include the Instrument Support Terminal, the Instrument Control Center, the Team Member Computing Facility, the Central Data Handling Facility, and the Data Archive and Distribution System. The specifications include sizing estimates for the processing and storage capacities of each data system element, as well as traffic analyses of data flows between the elements internally, and also externally across the data system interfaces. The specifications for the data system, as well as for the individual planning and scheduling, control and monitoring, data acquisition and processing, calibration and validation, and data archive and distribution components, do not yet fully specify the data system in the complete manner needed to achieve the scientific objectives of the MODIS instruments and science teams. The teams have not yet been formed; however, it was possible to develop the specifications and conceptual design based on the present concept of EosDIS, the Level-1 and Level-2 Functional Requirements Documents, the Operations Concept, and through interviews and meetings with key members of the scientific community.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-100721 , REPT-89B00065 , NAS 1.15:100721
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    A new interstellar polyatomic molecule - Detection of propynal in the cold cloud TMC-1 (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The detection of the acetylene derivative propynal in the cold cloud TMC-1, with an abundance that is very close to that for the related species tricarbon monoxide, is reported. Propadienone, an isomer of propynal, was not detected and is hence less abundant than either C3O or HC2CHO.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 335; L89-L93
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Nickel, argon and cobalt in the infrared spectrum of SN1987A - The core becomes visible (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Infrared spectra of supernova 1987A taken in April and November 1987 are presented, showing two distinctly different stages in the evolution of the expanding gas shell. The optical and infrared spectrum in April originated from the hydrogen envelope and show weak hydrogen lines rising above a 5,000-K photospheric continuum. The November spectrum was dominated by strong emission lines from heavy elements as well as many lines from highly excited levels of hydrogen, with peak flux levels in the lines at or slightly above the level of the continuum in April. It is concluded that the inner regions of the supernova were just becoming visible in early 1988. It is expected that these regions contain heavy elements produced by advanced nuclear burning stages in the progenitor star and in the shock wave that ejected all material external to the iron core.
    Keywords: ASTROPHYSICS
    Type: Nature (ISSN 0028-0836); 331; 505
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Interplanetary magnetic field draping about fast coronal mass ejecta in the outer heliosphere (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The possibility that the IMF becomes draped around coronal mass ejections (CMEs) propagating rapidly through the quiescent solar wind into the outer heliosphere is investigated theoretically. The results are presented in diagrams and graphs and discussed in detail. It is found that large sunward-directed structures analogous to the Venus and cometary magnetotails should form when the CME velocity exceeds the solar-wind velocity by more than the local Alfven speed; such structures could hang up swept-up IMF flux for as long as several days. Pioneer 11 magnetic-field measurements at 6.9-9.4 AU from three 20-d periods in 1978 are examined and shown to contain some features consistent with CME draping.
    Keywords: ASTROPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 93; 2519-252
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    NASA TECHNICAL REPORTS
  • 9
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    Collisional excitation of interstellar water (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Rates for rotational excitation of water molecules in collisions with He atoms have been obtained from a new, accurate theoretical interaction potential. Rates among the lowest 40 ortho levels are given for kinetic temperatures to 1400 K and among the lowest 29 para levels for kinetic temperatures to 800 K.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal Supplement Series (ISSN 0067-0049); 68; 287-318
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Lidar observations of the fine-scale variability of marine stratocumulus clouds (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: An Nd:YAG lidar system was flown aboard NASA's ER-2 high altitude aircraft. Observations of cloud top height were made with 70 m along-track and 7.5 m vertical-height resolution. The lidar data observed from an East Pacific stratocumulus cloud height deck revealed large cloud variability on 1-5 km scales. The cloud deck sloped upward from 700 to 1000 m in a northeast-southwest direction over a distance of 120 km. Vertical cloud top distributions were negatively skewed indicating flat-topped clouds. The dominant spectral peak of the cloud top variations was found at 4.5 km, which is 5 to 7 times the depth of the local boundary layer. No other peaks were significant in the average spectrum. The cloud layer was stable with respect to cloud top entrainment instability. The southwestern region of the study area was more prone to shear instability at cloud top than the northeastern region. The results of this study show that a lidar system is ideal to provide the topography of clouds and local boundary layer depth. This information is useful in the study of cloud top radiation and parameterization of clouds in numerical models.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Applied Meteorology (ISSN 0894-8763); 27; 797-810
    Format: text
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    NASA TECHNICAL REPORTS
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