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  • 1
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    Asymptotic matching by the symbolic manipulator MACSYMA (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The delegation of the labor of calculating higher-order terms in singular perturbation (SP) expansions to a computer by the use of MACSYMA is considered. The method of matched asymptotic expansions is studied in detail for two model SP problems: a model resembling the boundary layer equation with a small parameter multiplying the highest derivatives; and a turning-point problem. It is shown that MACSYMA has successfully performed the higher-order matching in both problems.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: Journal of Computational Physics (ISSN 0021-9991); 61; 38-50
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Attenuation studies at 35 GHz (1972)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Instrumentation and preliminary results of studies of attenuation of 35 GHz radio signals transmitted through the atmosphere are reported. The purpose of this work is to provide information to supplement the ATS-5 downlink tests. Data on atmospheric losses at 35 GHz are being obtained by sun tracker techniques, sky temperature observations, and point-to-point transmissions.
    Keywords: COMMUNICATIONS
    Type: NASA-CR-122422
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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