Calculation and correction of piston phase aberration in synthesis imaging

Download
Author
Eastwood, Richard J.
Johnson, Anne Marie
Greenaway, Alan H.
Date
2009-01Metadata
Show full item recordAbstract
The principle of redundant spacings calibration has previously been described for the purpose of calibrating piston phase aberration affecting elements of a dilute aperture array using a system of linear equations in terms of the aperture phases as well as object phase information. Here we develop matrices for the correction of piston phase aberration by use of image sharpness and also by phase retrieval. these are both presented in wavefront sensor formulation in order to draw analogy between the approaches. We then discuss solution ambiguity affecting both methods and describe array design to prevent such ambiguity. the problem of increased image aliasing under image sharpness correction is also highlighted.
Description
The article of record as published may be found at http://dx.doi.org/1-84-7529/09/010195-11
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.Collections
Related items
Showing items related by title, author, creator and subject.
-
Dynamic Characteristics of Liquid Motion in Partially Filled tanks of Spinning Spacecraft
Agrawal, B.N. (1990);This paper presents a boundary layer model to predict dynamic characteristics of liquid motion in partially filled tanks of a spinning spacecraft. The solution is obtained by solving three boundary value problems: inviscid, ... -
Dynamic Characteristics of Liquid Motion in Partially Filled Tanks of a Spinning Spacecraft
Agrawal, B.N. (1993);This paper presents a boundary-layer model to predict dynamic characteristics of liquid motion in partially filled tanks of a spinning spacecraft. The solution is obtained by solving three boundary-value problems: an ... -
A statistical examination of the 500-mb 48-hr. prognoses prepared by Fleet Numerical Weather Facility, Monterey, California
Kelly, Roger W.; Nelson, Frank C. (Monterey, California: U.S. Naval Postgraduate School, 1963);The Fleet Numerical Facility (FNWF) 500-mb long-wave prognoses at latitudes 20N through 70N were analyzed statistically for possible errorbias. FNWF issued a correction field (verified minus prognostic) for each latitude ...