Revising M-Layer: Complex Exponent Representation

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 gain 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 this revision, be completely revised for better performance.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1992
Accession Number
ADA249121

Entities

People

  • Yin Y. Han

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Cyber
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Classification
  • Complex Numbers
  • Computations
  • Computer Programs
  • Computers
  • Electrical Engineering
  • Electromagnetic Radiation
  • Engineering
  • Equations
  • Numbers
  • Procedures (Computers)
  • Refraction
  • Refractive Index
  • Schools
  • Waveguides

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Computational Modeling and Simulation
  • Wave Propagation and Nonlinear Chaotic Dynamics.