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  • 1
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    Unbekannt
    In:  J. Geophys. Res., Würzburg, Pergamon, vol. 98, no. 44, pp. 8211-8223, pp. B05S01, (ISSN: 1340-4202)
    Publikationsdatum: 1993
    Schlagwort(e): Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Tectonics ; Fault zone ; Reflection seismics ; JGR
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2019-01-25
    Beschreibung: The return of a pristine sample from a comet would lead to greater understanding of cometary structures, as well as offering insights into exobiology. The paper presented at the Discovery Program Workshop outlined a set of measurements for what was identified as a SOCCER-like interplanetary mission. Several experiments comprised the total instrumentation. This paper presents a summary of CCSR with an overview of three of the four major instruments. Details of the major dust dynamics experiment including trajectory are given in this paper. The instrument proposed here offers the opportunity for the return of cometary dust particles gathered in situ. The capture process has been employed aboard the space shuttle with successful results in returning samples to Earth for laboratory analysis. In addition, the sensors will measure the charge, mass, velocity, and size of cometary dust grains during the encounter. This data will help our understanding of dusty plasmas.
    Schlagwort(e): ASTROPHYSICS
    Materialart: Lunar and Planetary Inst., Workshop on Particle Capture, Recovery and Velocity(Trajectory Measurement Technologies; p 11-16
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2019-06-28
    Beschreibung: Flight tests to determine the changes in the aerodynamic characteristics of an F-15 aircraft caused by dynamic ground effects are described. Data were obtained for low and high sink rates between 0.7 and 6.5 ft/sec and at two landing approach speeds and flap settings: 150 kn with the flaps down and 170 kn with the flaps up. Simple correlation curves are given for the change in aerodynamic coefficients because of ground effects as a function of sink rate. Ground effects generally caused an increase in the lift, drag, and nose-down pitching movement coefficients. The change in the lift coefficient increased from approximately 0.05 at the high-sink rate to approximately 0.10 at the low-sink rate. The change in the drag coefficient increased from approximately 0 to 0.03 over this decreasing sink rate range. No significant difference because of the approach configuration was evident for lift and drag; however, a significant difference in pitching movement was observed for the two approach speeds and flap settings. For the 170 kn with the flaps up configuration, the change in the nose-down pitching movement increased from approximately -0.008 to -0.016. For the 150 kn with the flaps down configuration, the change was approximately -0.008 to -0.038.
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TM-4604 , H-1999 , NAS 1.15:4604
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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