IEEE 1502-2007 pdf free

IEEE 1502-2007 pdf free.IEEE Recommended Practice for Radar Cross-Section Test Procedures.
This recommended practice establishes processes for the measurement of the electromagnetic scattering from objects. It is written for the personnel responsible for the operation of test ranges, and not for the design of such ranges. It recommends procedures for testing and documenting the quality of the measurement system. for calibrating the measurement system1 for carrying out the radar scattering measurements, and for delivering the measurement data in a useful fonnat to the end user.
The document defines radar cross section (RCS). describes different types of test ranges, and reviews methods of characterizing and operating radar scattering measurement ranges. Issues related to test object support systems, types of test ranges, instrumentation, signal polarization, calibration, data analysis, and range uncertainty are also discussed.
1.2 Purpose
Most radar scattering measurement ranges are built for a specific localized purpose. Methods of characterizing the ranges and performing the measurements are developed for the specific needs of each particular test range. This recommended practice is intended to establish guidelines so that operators and users of such ranges can provide results that are useful across the larger community of users.
2. The radar cross-section measurement process
2.1 Introduction
Radar scattering is typically represented as the RUS of the test object. This term evolved from the basic metric for radar scattering as the ratio of the power scattered from an object in units of power per solid angle (steradian) normalized to the plane wave illumination in units of power per unit area. The RCS is thus given in units of area (or effective cross-sectional area of the target, thus, the name). Note that the RCS of the test object is a property of the test object alone, and not a function of the radar system or the distance between the radar and the test object, as long as the object is in the far field. Often, this cross-sectional area is expressed in units of decibels with respect to a square meter and is abbreviated as dBsm (sometimes DBSM). Using this definition, the RCS of a radar target is a scalar ratio of powers. If the effects of polarization and of phase are included, the scattering can be expressed as a complex scattering matrix.
The measurement of the RCS of a test object requires the test object to be illuminated by an electromagnetic plane wave and the resultant scattered signal to be observed in the far field. After calibration, this process yields the RCS of the test object in units of area. or the full scattering matrix as a set of complex scattering coefficients.
The responsibilities of the range operators from the perspective of this document are listed as follows:
— Establish and document procedures for performing test measurements and follow those procedures
— Carry out radar scattering measurements
— Process the raw measurement data for quality assurance.
— Calibrate the system to obtain data in standard units of RCS
— Establish the overall accuracy of the measurement range (the error bars on the RCS measurements)
— Determine the accuracy of the measurement instrumentation
— Determine the quality of the illuminating plane wave
— Determine the accuracy of the calibration reference standards.IEEE 1502 pdf download.