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  • Other Sources  (12)
  • 1
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    Unknown
    In:  Other Sources
    Publication Date: 2011-08-16
    Description: Spacecraft position determination by holographic approach involving single star formation
    Keywords: NAVIGATION
    Type: ; STITUTION OF RADIO A
    Format: text
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  • 2
    Publication Date: 2011-08-16
    Description: Star field pattern recognition methods for spacecraft attitude determination without a priori knowledge of star position-vehicle attitude relationship
    Keywords: NAVIGATION
    Type: ; ADEMIE DES SCIENCES
    Format: text
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  • 3
    Publication Date: 2011-08-17
    Description: There is a need for a sensor at the airport that can remotely detect, identify, and track wind shears near the airport in order to assure aircraft safety. To determine the viability of a laser wind-shear system, the NASA pulsed coherent Doppler CO2 lidar (Jelalian et al., 1972) was installed in a semitrailer van with a rooftop-mounted hemispherical scanner and was used to monitor thunderstorm gust fronts. Wind shears associated with the gust fronts at the Kennedy Space Center (KSC) between 5 July and 4 August 1978 were measured and tracked. The most significant data collected at KSC are discussed. The wind shears were clearly visible in both real-time velocity vs. azimuth plots and in postprocessing displays of velocities vs. position. The results indicate that a lidar system cannot be used effectively when moderate precipitation exists between the sensor and the region of interest.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: American Meteorological Society; vol. 60
    Format: text
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  • 4
    Publication Date: 2019-06-27
    Description: A previous flight test of two electro-optical pilot warning indicators, using a flashing xenon strobe and silicon detectors as cooperative elements, pointed out several design deficiencies. The present laboratory evaluation program corrected these faults and calibrated the sensitivity of both systems in azimuth elevation and range. The laboratory tests were performed on an optical bench and consisted of three basic components: (1) a xenon strobe lamp whose output is monitored at the indicator detector to give pulse to pulse information on energy content at the receiver; (2) a strobe light attenuating optical system which is calibrated photometrically to provide simulated range; and (3) a positioning table on which the indicator system under study is mounted and which provides spatial location coordinates for all data points. The test results for both systems are tabulated.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-124721 , DOT-TSC-NASA-71-5
    Format: application/pdf
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  • 5
    Publication Date: 2019-07-13
    Description: A Boeing 747 aircraft flew 54 passes at low level over ground-based sensors. Vortex velocities were measured by a laser-Doppler velocimeter, an array of monostatic acoustic sounders, and an array of propeller anemometers. Flow visualization of the wake was achieved using smoke and balloon tracers. Preliminary results were obtained on the initial downwash field, the time for merging of the multiple vortices, the velocity fields, vortex decay, and the effects of spoilers and differential flap settings on the dissipation and structure of vortices.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 77-9 , Aerospace Sciences Meeting; Jan 24, 1977 - Jan 26, 1977; Los Angeles, CA
    Format: text
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  • 6
    Publication Date: 2019-06-27
    Description: Selected ordinates for Fourier analysis on periodic curve
    Keywords: MATHEMATICS
    Type: NASA-TN-D-5083
    Format: application/pdf
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  • 7
    facet.materialart.
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    In:  CASI
    Publication Date: 2019-06-27
    Description: Three-beam technique superimposes a number of patterns in the same plane of a hologram and then uniquely identifies each pattern by a suitable readout process. The developed readout process does not require any movement of parts.
    Keywords: PHYSICAL SCIENCES
    Type: ERC-10151
    Format: application/pdf
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  • 8
    Publication Date: 2019-06-27
    Description: Multiple pattern holographic information storage and readout system
    Keywords: MASERS
    Format: application/pdf
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  • 9
    Publication Date: 2019-07-10
    Description: Volume V of the Report contains appendices that were not cited in VolumeI. These consist of documents produced by NASA and other organizations, which were provided to the Columbia Accident Investigation Board in support of its inquiry into the February 1, 2003 destruction of the Space Shuttle Columbia The contents include:. Appendix G.1 Requirements and Procedures for Certification of Flight Readiness; Appendix G.2 Appendix R, Space Shuttle Program Contingency Action Plan; Appendix G.3 CAIB Charter, with Revisions; Appendix G.4 Group 1 Matrix Brief on Maintenance, Material, and Management; Appendix G.5 Vehicle Data Mapping(VDM) Team Final Report, Jun 13, 2003; Appendix G.6 SRB Working Group Presentation to CAIB; Appendix G. 7 Starfire Team Final Report, Jun 3, 2003; Appendix G.8 Using the Data and Observations from Flight STS-107, Executive Summary; Appendix G.9 Contracts, Incentives, and Safety/Technical Excellence; Appendix G.10 Detailed Summaries: Rogers Commission Report, ASAP Report, SIAT Report; Appendix G.11 Foam Application and Production Chart; Appendix G.12 Crew Survivability Report; and Appendix G.12 Aero/Aerothermal/ Thermal/Structures Team FinalReport, August 6, 2003.
    Keywords: Astronautics (General)
    Type: PB2004-100870
    Format: text
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  • 10
    Publication Date: 2019-07-10
    Description: This is Volume Four of a set of six reports produced by NASA and other organizations which were provided to the Columbia Accident Investigation Board (CAIB) in support of its inquiry into the February 1, 2003 destruction of the Space Shuttle Columbia. The Technical Documents included in this volume are: Appendix F.1 Water Absorption by Foam; Appendix F.2 Follow the TPS; Appendix F.3 MADS Sensor Data; Appendix F.4 ET Cryoinsulation; Appendix F.5 Space Shuttle STS-107 Columbia Accident Investigation, and External Tank Working Group Final Report - Volume 1.
    Keywords: Astronautics (General)
    Type: PB2004-100869
    Format: text
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