Revising M-Layer: complex exponent representation.
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Authors
Yin, Yuan Han
Subjects
Tropospheric Propagation
Advisors
Lee, Hung-Mou
Date of Issue
1992-03
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The waveguide mode tropospheric propagation effect prediction program, M-Layer, originally written by Naval Command Control and Ocean Surveillance Center, Research, Development, Test and Engineering Division (NRaD), is revised for greater accuracy, speed and stability. The accuracy improvement is achieved first by converting the extended complex number representation into the representation by the complex exponent then by re-writing the group of Airy function computation subroutines. This accuracy improvement makes it possible to implement a self checking procedure for determining the proper method to evaluate the height gaing function. Finally, a new mode locating algorithm is introduced which improves the efficiency of mode search and eliminates the looping problem observed. The revision has been documented and the new program source code has been delivered to NRaD. It is also recommended that the mode search protocol, not just the mode locating algorithm introduced in in this revision, be completely revised for better performance.
Type
Thesis
Description
Series/Report No
Department
Electrical Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
69 p.;28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.