Accession Number:

AD0329363

Title:

MEASUREMENTS USING A POLARIZATION INSTRUMENTATION RADAR ON SELECTED TARGETS

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

1962-04-01

Pagination or Media Count:

51.0

Abstract:

An X-band pulsed radar system designed to measure echoing area and target-polarization characteristics was built. Transmission of any one of four polarized components is possible vertical, horizontal, right circular, and left circular, and the system is capable of receiving simultaneously along all four resolved components. Tests were conducted on a variety of ships, and polarized component return was calibrated and recorded for different transmitted polarizations. Tests on propeller-driven aircraft Convair 240 and a T-28 indicate the behavior of such factors as propeller modulation on polarized component return. An F3H jet aircraft was examined during flight and while dispensing chaff. Echo-area calibration indicates nose-on and broadside cross- section areas on the order of 120 and 12,000 sq ft, respectively. The characteristics of chaff and sea return were examined in detail. Although the return from chaff and the sea appears equally noisy, sea return displays prominent power fading, whereas the chaff also displays polarization changes. Author

Subject Categories:

  • Radar Countermeasures
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE