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  • Other Sources  (24,241)
  • AERODYNAMICS  (12,790)
  • EARTH RESOURCES AND REMOTE SENSING  (10,347)
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  • Other Sources  (24,241)
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  • 1
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    The LANDSAT Tutorial Workbook: Basics of Satellite Remote Sensing (1982)
    In:  CASI
    Details
    Publication Date: 2019-11-23
    Description: Most of the subject matter of a full training course in applying remote sensing is presented in a self-teaching mode in this how-to manual which combines a review of basics, a survey of systems, and a treatment of the principles and mechanics of image analysis by computers, with a laboratory approach for learning to utilize the data through practical experiences. All relevant image products are included.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-RP-1078 , NAS 1.61:1078 , E83-10001 , LC-81-600117
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    The Use of High Spectral Resolution Bands for Estimating Absorbed Photosynthetically Active Radiation (A Par) (1994)
    In:  CASI
    Details
    Publication Date: 2019-11-07
    Description: Most remote sensing estimations of vegetation variables such as Leaf Area Index (LAI), Absorbed Photosynthetically Active Radiation (APAR), and phytomass are made using broad band sensors with a bandwidth of approximately 100 nm. However, high resolution spectrometers are available and have not been fully exploited for the purpose of improving estimates of vegetation variables. A study directed to investigate the use of high spectral resolution spectroscopy for remote sensing estimates of APAR in vegetation canopies in the presence of nonphotosynthetic background materials such as soil and leaf litter is presented. A high spectral resolution method defined as the Chlorophyll Absorption Ratio Index (CARI) was developed for minimizing the effects of nonphotosynthetic materials in the remote estimates of APAR. CARI utilizes three bands at 550, 670, and 700 nm with bandwidth of 10 nm. Simulated canopy reflectance of a range of LAI were generated with the SAIL model using measurements of 42 different soil types as canopy background. CARI obtained from the simulated canopy reflectance was compared with the broad band vegetation indices (Normalized Difference Vegetation Index (NDVI), Soil Adjusted Vegetation Index (SAVI), and Simple Ratio (SR)). CARI reduced the effect of nonphotosynthetic background materials in the assessment of vegetation canopy APAR more effectively than broad band vegetation indices.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: GSFC-E-DAA-TN72921 , CNES, Proceedings of 6th International Symposium on Physical Measurements and Signatures in Remote Sensing; p 299-306
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    NASA TECHNICAL REPORTS
  • 3
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    Astronautics and aeronautics, 1969 Chronology on science, technology, and policy (1970)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Statistical mechanics for wall shear turbulence in Couette flow based on Brownian motion and comparison with stochastic theory based on Navier-Stokes equation
    Keywords: AERODYNAMICS
    Type: NASA-SP-4014
    Format: application/pdf
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  • 4
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    Aeronautical Engineering A special bibliography with indexes, supplement 7 (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Annotated bibliography and indexes on aeronautical engineering and aerodynamics - July 1971
    Keywords: AERODYNAMICS
    Type: NASA-SP-7037(07)
    Format: application/pdf
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  • 5
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    Analytic Methods in Aircraft Aerodynamics (1970)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Analyses of aircraft aerodynamic characteristics
    Keywords: AERODYNAMICS
    Type: NASA-SP-228 , A Symposium Held at Ames Research Center; Oct 28, 1969 - Oct 30, 1969; MOFFETT FIELD, CA; United States
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  • 6
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    Aeronautical Engineering - A special bibliography with indexes /supplement 1/ (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Annotated reference bibliography on aeronautical engineering documents
    Keywords: AERODYNAMICS
    Type: NASA-SP-7037(01)
    Format: application/pdf
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  • 7
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    The National and International Significance of the Lunar Exploration Program (1963)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Review of steps taken by nasa toward landing a man on the moon
    Keywords: AERODYNAMICS
    Type: Advancees in the Astronautical Sciences: Manned Lunar Flight; 10; 11-20
    Format: text
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  • 8
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    Aeronautical engineering - A special bibliography, supplement 2 (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Annotated bibliography and indexes on aeronautical engineering and aerodynamics - Jan. 1971
    Keywords: AERODYNAMICS
    Type: NASA-SP-7037(02)
    Format: application/pdf
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  • 9
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    Hypersonic aerodynamics test facility using the external propulsion accelerator (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The use of the External propulsion Accelerator (EPA) for launching models of hypersonic aerodynamic configurations into an instrumented ballistic range is discussed. The aerodynamic model is encased inside an axisymmetric projectile designed to be accelerated to high speed in the EPA. Accelerator lengths required to achieve hypersonic speeds are estimated to vary from 10 meters for Mach 7, 40 meters for Mach 10, 150 meters for Mach 15, and 700 meters for Mach 30, assuming a limit of 50,000 g's acceleration. For a model span of 10 cm to 25 cm, the launch tube diameters are 40 cm and 100 cm, respectively. Using this EPA launcher will enable exact simulation of hypersonic flight in ground facilities where both the gas composition and pressure can be controlled in the ballistic range.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 95-6138 , AIAA, Aerospace Planes and Hypersonics Technologies Conference; Apr 03, 1995 - Apr 07, 1995; Chattanooga, TN; United States|; 5 p.
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  • 10
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    The Tropical Rainfall Measuring Mission (TRMM) (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The Tropical Rainfall Measuring Mission (TRMM) is a cooperative effort between National Space Development Agency (NASDA) of Japan and NASA of the USA. TRMM is designed to measure rain rates from space using a combination of high resolution radar, passive microwave radiometer and visible-infrared radiometer measurements from a spacecraft in a rapid precession, 350 km orbit inclined at 35 deg. These measurements, averaged over a 500 km grid for a month, are expected to provide monthly mean rainfall to an accuracy of 10 to 15 percent. TRMM will also make it possible to analyze the diurnal component of the rainfall and to derive the vertical distribution of latent heating. An accurate measure of the oceanic rainfall distribution will provide unprecedented insight into the halocline distribution and the stability of the oceanic surface layers. A status of the program is presented.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Advances in Space Research (ISSN 0273-1177); 14; 3; p. (3)159-(3)165
    Format: text
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    NASA TECHNICAL REPORTS
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