The SECPOP90 team thanks everyone who helped make this report and the SECPOP90 s o h a r e a reality. In particular we are especially grateful to Brian Lewis, our summer student from Cornell University, who helped make SECPOP90 a more useful program by providing it with many additional features and extensive error checking of all user input; and Donald Mitchell, Sandia National Laboratories, whose assistance with the county-level database effort was invaluable.xi NUREGiCR-6525 of the SECPOP90 software. The third section is the user's guide, which explains how to use the software in a step-by-step manner. The fourth section describes the algorithms and methodologies used to perform the population, land fraction, and economic estimates. The fifth section discusses the software design, development, and verification and validation.Additional appendices describe input and output file formats, the U.S. Bureau of Census CD-ROMs to block census and county census data file conversions, and the complete SECPOP90 Visual Basic code listing. .I Report ConventionsThe following conventions will be used throughout this report: Table 1.1 Report Conventions Em 1 an a ti on Convention ~~ SECPOP90 V2.0 MACCS S i t e Data FileA monospaced font w i l l be used for example data files, operating system messages, code fragments, and the SECPOP90 code listings.A bold monospaced font will be used for input that the user is expected to type in.The return or enter key. The user should press this key where it is indicated in this report.An italicized monospaced font will be used for input parameters that the user is to provide and type in.Text in small caps indicates one of the special keys on the keyboard.A plus sign indicates that the first key should be pressed and held down then the second and subsequent keys pressed.Acronyms will be defined where they are first used. The defining phrase will be capitalized in correspondence to the letters that make up the acronym. The definition will be followed by the acronym in parentheses.

A real-time optical processor has been built to investigate the applicability of optical processing to synthetic aperture radar image formation. By taking advantage of the high processing speed and large time-bandwidth product of acoustooptic devices (AODs) combined with the multichannel correlation capability of CCD detectors used in the time delay and integrate (TDI) mode, a small real-time SAR processor can be built. The required 2-D matched filtering operation is first performed in range using the AOD and then the azimuthal matched filtering is performed using either a fixed or alterable mask in a TDI correlator configuration.1 A processor has been built to investigate the effect of system architecture on image quality and system complexity. The system is described and experimentally obtained PSF and image data are shown. The potential for system miniaturization and ruggedization is also discussed.