Threat Laydown — ECE 495

Plan view · one site · North up

Radar and aircraft

Mast h_r10 m

Heading ψ090°

Altitude h_t12000 m

Missile (constant-speed model)

v_m avg1.00 km/s

t_max40 s

v_t aircraft0.25 km/s

Show

Nose-on R_det

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Beam R_det

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Tail R_det

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Horizon d

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4/3 Earth

MEZ

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(v_m+v_t)t_max

LEZ

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(v_m−v_t)t_max

Which binds

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First shot

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Min R_det

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Nose-on ring Aspect contour Seen (contour ∩ horizon) Horizon MEZ LEZ Heading envelope Lethal zone (TTR ∩ envelope, outside R_min 4 km)

Nose, beam, tail, binds and first shot read the nose-on approach (flying straight at the site). First shot needs the X-band TTR's track and the MEZ. Teaching model: constant average missile speed; the envelope is the radial approximation (v_m + v_t cos α)t_max.