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Title: Compound radar waveforms with multiple frames.


Abstract not provided.

Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the SPIE Defense, Security & Sensing Symposium 2013 held April 29 - May 3, 2013 in Baltimore, MD.
Country of Publication:
United States

Citation Formats

Doerry, Armin Walter, and Marquette, Brandeis. Compound radar waveforms with multiple frames.. United States: N. p., 2013. Web.
Doerry, Armin Walter, & Marquette, Brandeis. Compound radar waveforms with multiple frames.. United States.
Doerry, Armin Walter, and Marquette, Brandeis. 2013. "Compound radar waveforms with multiple frames.". United States. doi:.
title = {Compound radar waveforms with multiple frames.},
author = {Doerry, Armin Walter and Marquette, Brandeis},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2013,
month = 2

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  • Abstract not provided.
  • Multiple right-hand sides occur in radar scattering calculations in the computation of the simulated radar return from a body at a large number of angles. Each desired angle requires a right-hand side vector to be computed and the solution generated. These right-hand sides are naturally smooth functions of the angle parameters and this property is utilized in a novel way to compute solutions an order of magnitude faster than LINPACK The modeling technique addressed is the Method of Moments (MOM), i.e. a boundary element method for time harmonic Maxwell`s equations. Discretization by this method produces general complex dense systems ofmore » rank 100`s to 100,000`s. The usual way to produce the required multiple solutions is via LU factorization and solution routines such as found in LINPACK. Our method uses the block GMRES iterative method to directly iterate a subset of the desired solutions to convergence.« less
  • The compact range has become widely used as a means of simulating far-field free-space conditions for RCS measurements. The most obvious way to illuminate such a range is to place a single feed at the focus of the lens or reflector system which collimates the field. However, in order to achieve greater isolation between the radar transmitter and receiver over wide bandwidths, two feeds are often used. Recently, interest has increased in the use of the compact range for performing complete polarimetric measurements, and the idea of similarly achieving greater polarization isolation through the use of multiple feeds is enticing.more » However, when the system is intended to measure the coherent polarization scattering matrix, the use of multiple feeds can lead to serious errors if the feed system is not carefully considered. It is well known that the use of a separate transmit and receive feed will result in a small bi-static angle for the RCS measurement. Often, this is considered acceptable and of no consequence to the validity of the data. As will be shown, the use of separate transmit and receive feeds can cause phase errors between the elements of the polarization scattering matrix. The situation is made worse by the fact that the magnitude of these errors depends on the location of the scatterer with respect to the range axis. This position dependence makes post-measurement correction of the data difficult if not impractical. 3 refs.« less