Technology Explained — Clam Shell Radar

76N6 Clam Shell Radar Revealed

The Moscow based LEMZ (Lianozovo) company is now openly marketing the Clam Shell (76N6) low altitude search and acquisition radar for the SA-10A/B (S-300PMU) Grumble SAM system.

Representatives of the company provided a technical briefing to Australian Aviation at this year’s Avalon Airshow in Melbourne. The SA-10 is at this time the most potent of the late generation ex-Soviet strategic area defence SAM systems to be exported.

The Clam Shell is a low altitude FMCW (frequency modulated continuous wave) search and acquisition radar designed to detect and track approaching and receding low radar cross section (RCS) targets, particularly cruise missiles. The system will detect targets at extremely low altitudes in ground clutter under intense ECM conditions. This system is described as fully automatic and provides target track information for the fire control system of the static SA-10A or mobile SA-10B Grumble area defence SAM. Approaching and receding target velocity, range and bearing are provided, with selectable one or six degree vertical beamwidths, and selectable beam polarisation.

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