Improvements to the Staniforth-Mitchell barotropic numerical weather prediction code
Abstract
Improvements to the Staniforth-Mitchell barotropic numerical weather prediction code are
proposed. Three separate contributions are described: (1) a direct solution of the Helmholtz
equation is offered as a substitute for the iterative scheme currently employed;
(2) a new algorithm is developed to solve the generalized eigenvalue problem for symmetric
tridiagonal matrices; (3) the latter algorithm is extended to deal with a periodic boundary
condition. It is estimated that a direct solution of the Helmholtz equation, for a
13 x 13 grid, will effect a computation time saving per time step of at least 10 percent.
FORTRAN 77 listings of the subroutines needed to implement the proposed improvements are
included.
Description
Interim Report for Period June 1986 - September 1986
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.NPS Report Number
NPS69-35-Q08Related items
Showing items related by title, author, creator and subject.
-
Dynamics of Naval Ship design : a systems approach.
Laverghetta, Thomas A. (Monterey California. Naval Postgraduate School, 1998);The 1990 Naval Sea Systems Command Ship Design, Acquisition and Construction (DAC) Study provides a stepping stone for the implementation of improvements towards optimizing ship performance, cutting acquisition ... -
A CONCEPTUAL ARCHITECTURE TO ENABLE INTEGRATED COMBAT SYSTEM ADAPTIVE OPERATIONAL READINESS ASSESSMENTS
Brown, Jonas (Monterey, CA; Naval Postgraduate School, 2019-09);Delivering on the power of data to ships in austere or contested environments requires careful consideration of system capacity, bandwidth, and processes to drive capability. Ship-based and shore-based applications and ... -
Measuring shallow water waves with pressure sensors
Goncalo, Vitor Manuel Henriques (Monterey, California. Naval Postgraduate School, 1978-09);For two locations within the surf zone sea surface elevations were observed using a wave staff and a pressure sensor while simultaneously the two horizontal orthogonal components, u and v, of water particle velocity were ...