The storage, crosscorrelation radar developed under Project Music uses several t y p e s of passive filters which serve diverse purposes in the equipment chain preceding the data-analysis sections. Laboratory-developed filters were em,)yed, as well as a commercially available type. Problems to which these filters were applied included, primarily, the elimination of interference by large-area s i g n a Ireturn or backscatter, separation and limitation of the desired doppler frequencies, sideband elimination, and the removalof 60-cycle modulation from the received signal. The filter units Incorporated into the Music system have given reliable service in the more than three years they have been in operation.
CunfidentialiThe P.-u -It L Mu,6h" radar is a researco equipment which utilizes storage and crusscorrelation techrniqoes for c-nhzicIng phabe-cuh. vtni sigi.als in the presence ov , Tht storage system embo'Jied in the M4si.' radar is used au a delay device tw store periodically fur subsequent use a copy of the transmitted signal. A circuit was developed fur get,-,ratuag a atep-functiun voltage, properly stabilized, fur us, at the target of the Radechlon storage tube in switching from a wilting to a reading comditIon. An improved readout cFrcuitry, for greater simllcity and a further enha.nced output signal-to-nuisc ratio, and an effective system for magnetic and electrortatic shielding of the sturage tube and Its ashi,-Ciated circuitry witre desagneA A preproduction Radechon type C73404 wa@ obtainid and ,:sed in the storage system which vwas in.vi-purated itt thebfusic equipment. A comnpletf storage syat in was developed and has been in use in the Music radar bysttcm fu: several years.
PROBLEM STATUSThis is an interim report on (irie pha.ie of the problem; wuik r• kontinuing on this and other phases.of the pr,_blem.
AUTHORIZATION
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