An analysis of MLAYER: a multilayer tropospheric propagation program
Adler, Richard W.
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MLAYER, a computer program, was developed by the Naval Ocean Systems Center (NOSC) for calculating the signal levels of electromagnetic waves propagating in a multilayer tropospheric waveguide environment over seawater. The program is an extension of the XWVG which is a trilinear ducting program. Modifications of the XWVG were carried out to handle multilayer tropospheric ducts. A number of modifications and improvements on the program made over the past several years were not documented. A detailed documentation of MLAYER was also not available. The object of this thesis is to develop a technical documentation for MLAYER using the program as baseline. The study aims to put together the theoretical formulations (specific to MLAYER) into a complete self- contained document. This is to facilitate potential users with better appreciation of the capabilities, limitations, approximations and assumptions used in the mathematical modelling techniques. As far as possible, the same terminologies and functional variables used by Baumgartner (in the XWVG development) and by Pappert (in the MLAYER development) are adopted to enable one to relate this document to the program. Step-by-step derivation of certain equations was carried out and checked for compatibility with the algorithm in the program.
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Chang, Ting-Hsun (Monterey, California. Naval Postgraduate School, 1991-03);The dependence of the predictions of the MLAYER program on the set of heights at which the refractive index value are sampled from a fixed reference profile are analyzed. A refractivity profile with a four-meter evaporation ...
Lee, Hung-Mou; Han, Yin Yuan (Monterey, California. Naval Postgraduate School, 1992-03); NPS-EC-92-005M-layer,the tropospheric propagation effect prediction program is revised for greater accuracy, speed and stability. This is achieved through converting the extended complex number representation into the representation ...
Yin, Yuan Han (Monterey, California. Naval Postgraduate School, 1992-03);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 ...