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  • SPACE RADIATION  (5)
  • EARTH RESOURCES AND REMOTE SENSING  (2)
  • 2020-2022
  • 2010-2014
  • 1975-1979  (7)
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Keywords
Years
Year
  • 1
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    Search for broad gamma ray lines with the UCR double Compton scatter telescope (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The operation of a double scatter telescope and the evaluation of data obtained during a 24 hour balloon flight are discussed. An increase in gamma rays was observed as the galactic anti-center crossed the aperature of the telescope. Searches for lines from p(n,gamma)d at 2.2 MeV, C-12* at 4.4 MeV and on -16* at 6.1 MeV and for other lines broadened or redshifted are being conducted to identify the processes responsible for the production of celestial gamma rays. Two upper limits for lines in the angalactic anti-center direction at 4.4 MeV and 6.1 MeV are 6 and 4 x 10 to the minus 4 power gamma/sq cm-s.
    Keywords: SPACE RADIATION
    Type: NASA. Goddard Space Flight Center Gamma Ray Spectry. in Astrophys.; p 217-222
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Cosmic diffuse gamma rays from 2 to 25 MeV (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Results are reported for measurements of cosmic diffuse gamma rays performed with a double Compton scatter gamma-ray telescope flows aboard a balloon at 3.5-g/sq cm residual atmosphere. The operation and calibration of the telescope are briefly reviewed, unwanted backgrounds are identified, and the only significant background for the telescope used is shown to arise from the interaction of albedo neutrons with hydrogen and carbon in one of the liquid scintillators. The fluxes of cosmic diffuse gamma rays with energies of 2 to 3, 3 to 5, 5 to 7, 7.5 to 10 MeV are listed, and upper limits are provided for energies of 10 to 15 and 15 to 25 MeV. These data are compared with numerous previous measurements, and no indication is found that the diffuse radiation is statistically different from isotropic. Upper limits are placed on the gamma-ray fluxes (mainly 3 to 25 MeV) from various localized sources.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal; vol. 218
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Adaptive remote sensing technology for feature recognition and tracking (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A technology development plan designed to reduce the data load and data-management problems associated with global study and monitoring missions is described with a heavy emphasis placed on developing mission capabilities to eliminate the collection of unnecessary data. Improved data selectivity can be achieved through sensor automation correlated with the real-time needs of data users. The first phase of the plan includes the Feature Identification and Location Experiment (FILE) which is scheduled for the 1980 Shuttle flight. The FILE experiment is described with attention given to technology needs, development plan, feature recognition and classification, and cloud-snow detection/discrimination. Pointing, tracking and navigation received particular consideration, and it is concluded that this technology plan is viewed as an alternative to approaches to real-time acquisition that are based on extensive onboard format and inventory processing and reliance upon global-satellite-system navigation data.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Institute of Electrical and Electronics Engineers, Conference on Pattern Recognition and Image Processing; Aug 06, 1979 - Aug 08, 1979; Chicago, IL
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Long duration soft X-ray transients: Physical parameters and morphology (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Keywords: SPACE RADIATION
    Type: AFGL Contrib. Papers to the Study of Travelling Interplanetary Phenomena(1977; p 3-21
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Earth feature identification and tracking technology development (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The paper discusses needs for smart sensing in terrestrial and atmospheric remote sensing as related to current technology and a scheduled Shuttle experiment. An approach is outlined involving Shuttle-borne experiments to develop earth feature identification and tracking technology including a Feature Identification and Location Experiment (FILE) scheduled for flight on the NASA Shuttle with an objective of classifying earth features into categories of bare land, water, vegetation, and clouds, snow, and ice. The plan for evolution of the FILE-related technology leads to capabilities for pointing instruments to predetermined sites, reacquiring earth features or landmarks, and tracking features such as coastlines and rivers. Technology concepts relative to an overall system transfer function is discussed, and the development status outlined.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Smart sensors; April 17, 18, 1979; Washington, D. C.
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Cosmic diffuse gamma-rays at medium energies (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Cosmic diffuse gamma-ray fluxes have been measured in six energy intervals from 2 to 25 MeV with a balloon-borne gamma-ray telescope. It is found that the observed fluxes are compatible with an energy distribution of 0.0265 times E to the -2.08 (photon/sq cm-s-sr-MeV) at lower energies and steepen at higher energies to meet a power law of 0.017 (E/MeV) to the -2.4. No deviation of the gamma-ray flux from isotropy is observed for five different times during the balloon flight for 10-deg intervals up to 50 deg from the zenith and at celestial coordinates varying from latitude -27 deg, longitude 102 deg to latitude 56 deg, longitude 195 deg, excluding the region in the galactic-anticenter direction. Upper limits to fluxes of 3-25-MeV gamma rays are deduced for a number of possible galactic and extragalactic sources.
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 13, 1977 - Aug 26, 1977; Plovdiv; Bulgaria
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    NASA TECHNICAL REPORTS
  • 7
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    Gamma-rays of 3 to 25 MeV from the galactic anti-center and pulsar NP 0532 (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Gamma-rays of 3 to 25 MeV are reported from the galactic anticenter region and the Crab Pulsar, NP 0532. The observations were carried out from Palestine, Texas, on May 13, 1975. Gamma-rays from the galactic anticenter were observed as the Crab Nebula passed overhead within 10 deg of the zenith. Pulsed gamma-rays from NP 0532 were observed at a 4.4-sigma significance level. The total flux from 3-25 MeV is 0.0049 + or - 0.002 photon/sq cm-sec. The pulsed flux from NP 0532 from 3 to 25 MeV is 0.00043 + or - 0.00026 photon/sq cm-sec. The ratio of the total to the pulsed flux from 3 to 25 MeV is 11 + or - 8.
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 13, 1977 - Aug 26, 1977; Plovdiv; Bulgaria
    Format: text
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