Accession Number : AD0454398


Title :   RADAR RESOLUTION OF MOVING TARGETS,


Corporate Author : AEROSPACE CORP EL SEGUNDO CA


Personal Author(s) : Rihaczek, A W


Report Date : 11 Dec 1964


Pagination or Media Count : 31


Abstract : For targets that cannot be separated on the basis of the antenna beam pattern, an extensive theory of resolution in range and range rate is available. However, the ever increasing requirements on modern radar lead to situations where the assumption of constant range rate over the duration of the signal is not permissible. In order to provide a tool for analyzing radar resolution under those circumstances, the range-range rate theory is here extended to arbitrary target motion, in particular to range acceleration. The study starts with a discussion of the basic classes of radar measurements, envelope measurements for the determination of range and phase measurements for changes in range, which leads to an understanding of the general problem of moving target resolution. In extending the conventional ambiguity function to range acceleration and higher order range derivatives, it is found desirable to retain the delay axis and, hence, the interpretation of the ambiguity function as the response of the receiver filter. By also retaining the Doppler axis and treating the effects of range acceleration and higher order range derivatives parametrically, we have at our disposal the entire bulk of information on conventional ambiguity functions for all types of signal waveforms, readily usable to study the resolution of targets whose motion cannot be described by constant range rate. (Author)


Descriptors :   *MOVING TARGET INDICATORS , RESOLUTION , RANGE(DISTANCE) , ACCELERATION , MATCHED FILTERS , RADAR , RADAR EQUIPMENT , MEASUREMENT , MATHEMATICAL ANALYSIS , SEARCH RADAR , MAPPING , TERRAIN , AZIMUTH


Distribution Statement : APPROVED FOR PUBLIC RELEASE