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  • Other Sources  (17)
  • 1985-1989  (11)
  • 1970-1974  (6)
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  • 1
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    Correspondence between solar fine-scale structures in the corona, transition region, and lower atmosphere from collaborative observations (1989)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The Soft X-Ray Imaging Payload and the High Resolution Telescope and Spectrograph (HRTS) instrument were launched from White Sands on 11 December 1987 in coordinated sounding rocket flights to investigate the correspondence of coronal and transition region structures, especially the relationship between X-ray bright points (XBPs) and transition region small spatial scale energetic events. The coaligned data from X-ray images are presented along with maps of sites of transition region energetic events observed in C IV (100,000 K), HRTS 1600 A spectroheliograms of the T sub min region and ground based magnetogram and He I 10830 A images.
    Keywords: SOLAR PHYSICS
    Type: American Science and Engineering, Inc., Solar X-ray Astronomy Sounding Rocket Program; 26 p
    Format: application/pdf
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  • 2
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    Coronal manifestations of preflare activity (1986)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: A variety of coronal manifestations of precursors or preheating for flares are discussed. Researchers found that almost everyone with a telescope sees something before flares. Whether an all-encompassing scenario will ever be developed is not at all clear at present. The clearest example of preflare activity appears to be activated filaments and their manifestations, which presumably are signatures of a changing magnetic field. But researchers have seen two similar eruptions, one without any evidence of emerging flux (Kundu et al., 1985) and the other with colliding poles (Simon et al., 1984). While the reconnection of flux is generally agreed to be required to energize a flare, the emergence of flux from below (at least on short timescales and in compact regions) does not appear to be a necessary condition. In some cases the cancelling of magnetic flux (Martin, 1984) by horizontal motions instead may provide the trigger (Priest, 1985) Researchers found similarities and some differences between these and previous observations. The similarities, besides the frequent involvement of filaments, include compact, multiple precursors which can occur both at and near (not at) the flare site, and the association between coronal sources and activity lower in the atmosphere (i.e., transition zone and chromosphere).
    Keywords: SOLAR PHYSICS
    Type: Energetic Phenomena on the Sun: The Solar Maximum Mission Flare Workshop. Proceedings; 32 p
    Format: application/pdf
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  • 3
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    The non-metallic materials sample array (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Non-Metallic Materials Sample Array (MSA) was flown as verification flight instrumentation (VFI) on both Spacelab 1 (SL-1) and Spacelab 2 (SL-2). The basis for materials selection was either previous flight history or probable flight suitability based upon analysis. The observed changes in the optical properties of the exposed materials are, in general, quite minimal; however, this data represents the short exposure of two Space Shuttle missions, and no attempt should be made to extrapolate the long-term exposure. The MSA was in orbit for 10 days at approximately 240 km on SL-1 and for 7 days at approximately 315 km on SL-2. The array was exposed to the solar flux for only a portion of the time in orbit.
    Keywords: NONMETALLIC MATERIALS
    Type: NASA-TM-86578 , NAS 1.15:86578
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  • 4
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    X-ray bright points and He I lambda 10830 dark points (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Using near-simultaneous full disk Solar X-ray images and He I 10830 lambda, spectroheliograms from three recent rocket flights, dark points identified on the He I maps were compared with X-ray bright points identified on the X-ray images. It was found that for the largest and most obvious features there is a strong correlation: most He I dark points correspond to X-ray bright points. However, about 2/3 of the X-ray bright points were not identified on the basis of the helium data alone. Once an X-ray feature is identified it is almost always possible to find an underlying dark patch of enhanced He I absorption which, however, would not a priori have been selected as a dark point. Therefore, the He I dark points, using current selection criteria, cannot be used as a one-to-one proxy for the X-ray data. He I dark points do, however, identify the locations of the stronger X-ray bright points.
    Keywords: ASTRONOMY
    Type: American Science and Engineering, Inc., Solar X-ray Astronomy Sounding Rocket Program; 8 p
    Format: application/pdf
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  • 5
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    Effects of natural environment on first generation solid rocket booster thermal protection system materials (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The effort to demonstrate, by real-time exposure, the effects of the natural environment at Kennedy Space Center, Florida, upon the Thermal Protection System (TPS) of the Solid Rocket Booster (SRB) is summarized, and that the overall SRB TPS configuration is verified to meet all requirements for resistance to the conditions associated with outdoor weathering, including: solar radiation; temperature; humidity; precipitation; wind; sand/dust abrasion; static electricity; salt spray; fungus; and atmospheric oxidants. The evaluation criterion for this project was based upon flatwise tensile properties, visual inspection, color change, and thermal performance. Based upon the evaluation of the changes in these properties, it is concluded that properly applied and topcoat-protected TPS can satisfactorily withstand the conditions of the natural environment at KSC for exposures up to six months.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TM-100329 , NAS 1.15:100329
    Format: text
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  • 6
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    Results from OSO-IV - The long term behavior of X-ray emitting regions. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Analysis of images of the sun obtained with the aid of a grazing incidence X-ray telescope on board the OSO IV spacecraft in the 2.5 to 12-A waveband nearly continuously from Oct. 27, 1967, to May 12, 1968. The instrument had sufficient spatial resolution (one and four arc minutes) and temporal resolution (5 to 20 min) to estimate the spatial characteristics of X-ray emitting regions and to monitor the temporal behavior of individual active regions. Variations in the absence of flares of as much as a factor of 10 in the X-ray output of individual regions were observed, with typical durations ranging from several hours to several days. The X-ray time variations are related to observations at optical and radio wavelengths. The results are interpreted under the assumption that the X-ray time variations are caused by temperature changes in the coronal portions of active regions. The contribution of radiative losses to the energy budget of the coronal active region is estimated.
    Keywords: SPACE RADIATION
    Type: Solar Physics; 22; Jan. 197
    Format: text
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  • 7
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    The correspondence between small-scale coronal structures and the evolving solar magnetic field (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Solar coronal bright points, first identified in soft X-rays as X-ray Bright Points (XBPs), are compact, short lived and associated with small bipolar magnetic flux. Contradictory studies have suggested that XBPs are either a primary signature of the emerging flux spectrum of the quiet Sun, or that they are representative of the disappearance of pre-existing flux. Results are presented using coordinated data obtained during recent X-ray sounding rocket flights on 15 August and 11 December 1987 to determine the correspondence of XBPs with time-series, ground based observations of evolving bipolar magnetic structures, He-I dark points, and the network. The results are consistent with the view that coronal bright points are more likely to be associated with the annihilation of pre-existing flux than with emerging flux.
    Keywords: SOLAR PHYSICS
    Type: American Science and Engineering, Inc., Solar X-Ray Astronomy Sounding Rocket Program; 8 p
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  • 8
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    Video sync processor Patent (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Video sync processor with phase locked system
    Keywords: ELECTRONICS
    Format: application/pdf
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  • 9
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    Process and apparatus for making diamonds (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Process and apparatus for making diamond abrasives
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-TM-X-64543
    Format: application/pdf
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  • 10
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    Prime data reduction and analysis of the AS and E OSO-4 pointed and wheel experiments Final report (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: OSO-4 X ray telescope and rotating wheel experiments
    Keywords: SPACE RADIATION
    Type: NASA-CR-109862 , ASE-2432
    Format: application/pdf
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