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  • 1980-1984  (5)
  • 1
    Electronic Resource
    Electronic Resource
    The use of angles and angular rates (1980)
    Springer
    Celestial mechanics and dynamical astronomy 21 (1980), S. 281-290 
    Details
    ISSN: 1572-9478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Earlier work on the angles and angular rate initial orbit determination problem has been extended to allow the incorporation of arbitrary amounts and mixtures of angles and angular rate data. The statistical estimation technique used is that of Maximum Likelihood. Numerical tests on six widely different satellite orbits indicate that the orbital elements can generally be computed to 1% from data acquired during a single apparition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01230226
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    Paper (German National Licenses)
    Fulltext
  • 2
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    The use of angles and angular rates (1980)
    Springer
    Details
    Publication Date: 1980-04-01
    Print ISSN: 0923-2958
    Electronic ISSN: 1572-9478
    Topics: Physics
    Published by Springer
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    PAPER CURRENT
  • 3
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    Measurement of Electromagnetic Properties of Lightning with 10 Nanosecond Resolution (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Electromagnetic data recorded from lightning strikes are presented. The data analysis reveals general characteristics of fast electromagnetic fields measured at the ground including rise times, amplitudes, and time patterns. A look at the electromagnetic structure of lightning shows that the shortest rise times in the vicinity of 30 ns are associated with leader leader streamers. Lightning location is based on electromagnetic field characteristics and is compared to a nearby sky camera. The fields from both leaders and return strokes were measured and are discussed. The data were obtained during 1978 and 1979 from lightning strikes occuring within 5 kilometers of an underground metal instrumentation room located on South Baldy peak near Langmuir Laboratory, New Mexico. The computer controlled instrumentation consisted of sensors previously used for measuring the nuclear electromagnetic pulse (EMP) and analog-digital recorders with 10 ns sampling, 256 levels of resolution, and 2 kilobytes of internal memory.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA Langley Res. Center Lightning Technol.; p 39-83
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Test results of the STI GPS time transfer receiver (1983)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Global time transfer, or synchronization, between a user clock and USNO UTC time can be performed using the Global Positioning System (GPS), and commercially available time transfer receivers. This paper presents the test results of time transfer using the GPS system and a Stanford Telecommunications, Inc. (STI) Time Transfer System (TTS) Model 502. Tests at the GPS Master Control Site (MCS) in Vandenburg, California and at the United States Naval Observatory (USNO) in Washington, D.C. are described. An overview of GPS, and the STI TTS 502 is presented. A discussion of the time transfer process and test concepts is included.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA. Goddard Space Flight Center Proc. of the 14th Ann. Precise Time and Time Interval (PTTI) Appl. Planning Meeting; p 529-546
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    The NASA Software Management and Assurance Program (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: A committee of experienced managers representing each major NASA organization guides a major development effort which seeks to ensure the acquisition of economical and reliable software for more complex future programs. The primary, near-term development objectives of the NASA Software Management and Assurance Program are: (1) to provide the best management and technical guidance available; (2) to facilitate the use of proven tools, techniques, and information; and (3) to maintain a pool of highly qualified software personnel. The software development tasks addressed involve such problems as satellite end-to-end architecture and advanced aircraft guidance and control systems.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: AIAA PAPER 83-2336
    Format: text
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    NASA TECHNICAL REPORTS
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