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  • 1
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    Modeling the Earth's radiation belts. A review of quantitative data based electron and proton models (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The evolution of quantitative models of the trapped radiation belts is traced to show how the knowledge of the various features has developed, or been clarified, by performing the required analysis and synthesis. The Starfish electron injection introduced problems in the time behavior of the inner zone, but this residue decayed away, and a good model of this depletion now exists. The outer zone electrons were handled statistically by a log normal distribution such that above 5 Earth radii there are no long term changes over the solar cycle. The transition region between the two zones presents the most difficulty, therefore the behavior of individual substorms as well as long term changes must be studied. The latest corrections to the electron environment based on new data are outlined. The proton models have evolved to the point where the solar cycle effect at low altitudes is included. Trends for new models are discussed; the feasibility of predicting substorm injections and solar wind high-speed streams make the modeling of individual events a topical activity.
    Keywords: GEOPHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 21-35
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Trapped particle flux models at NSSDC/WDC-A-R/S (1989)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The data needed in the future for trapped particle modeling are summarized. A short summary of past and future modeling activities and a list of satellite data that have not yet been considered in the modeling efforts is included.
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: NASA, Langley Research Center, NASA(SDIO Space Environmental Effects on Materials Workshop, Part 2; p 569-572
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    The origin and evolution of the coordinated data analysis workshop process (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: During the planning stage for the International Magnetospheric Study (IMS), it was stressed that coordinated observations among various satellites and among satellite, ground-based, balloon, and rocket (GBR) experiments were essential in obtaining the required observational data base. In the course of operating the Satellite Situation Center (SSC), it was found to be desirable to assemble a problem-oriented digital data base, consisting of a large number of physical parameters obtained from satellite and GBR sensors, in a computer system which would permit a large number of scientists to manipulate, display, discuss, study and analyze the data together in a coordinated manner. It was felt that such a process might shorten the time required to gain full scientific understanding of the observations. This approach was called the Coordinated Data Analysis Workshop (CDAW) process. Attention is given to the preliminary concept, the the initial implementation of the CDAW process, and aspects of subsequent evolution.
    Keywords: GEOPHYSICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    The Satellite Situation Center (1982)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: Considerations related to the early planning for the International Magnetospheric Study (IMS) took into account the desirability of an establishment of specific entities for generating and disseminating coordination information for both retrospective and predictive periods. The organizations established include the IMS/Satellite Situation Center (IMS/SSC) operated by NASA. The activities of the SSC are related to the preparation of reports on predicted and actually achieved satellite positions, the response to inquiries, the compilation of information on satellite experiments, and the issue of periodic status summaries. Attention is given to high-altitude satellite services, other correlative satellite services, non-IMS activities of the SSC, a summary of the SSC request activity, and post-IMS and future activities.
    Keywords: GEOSCIENCES (GENERAL)
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    AP-8 trapped proton environment for solar maximum and solar minimum (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Data sets from Ov-3 and Azur indicate a need for improvement in models of the stably trapped proton flux with energies between 0.1 and 400 MeV. Two computer accessible models are described: AP8MAX and AP8MIN. The models are presented in the form of nomographs, B-L plots, R-lambda plots, and equatorial radial profiles. Nomographs of the orbit-integrated fluxes are also discussed. The models are compared with each other, with the data, and with previous AP models. Requirements for future improvements include more complete data coverage and periodic comparisons with new data sets as they become available. The machine-sensible format in which the models are available are described.
    Keywords: SOLAR PHYSICS
    Type: NASA-TM-X-72605 , NSSDC/WDC-A-R/S-76-06
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    A review of the near-earth radiation environment (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The spatial volume surrounding the earth out to 30 earth radii has been divided into the five regions known as the interplanetary medium, magnetosheath, plasma sheet, high-latitude magnetotail, and inner magnetosphere. In each region, the primary attributes of the particle populations and available models are described, and integral energy spectra covering the range from 10 to 10 billion eV are shown. The effects of the solar cycle on future projections are discussed.
    Keywords: SPACE RADIATION
    Type: Photovoltaic Specialists Conference; Jun 05, 1978 - Jun 08, 1978; Washington, DC
    Format: text
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    NASA TECHNICAL REPORTS
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