Radar cross-section of a generic aircraft at HF frequencies

Coastal HF radar in the ground-wave mode may be useful monitoring the movement of ships, aircraft and icebergs over vast areas of ocean. A HF frequencies an aircraft is in the 'resonance range' of size. This paper studies the radar cross-section (RCS) of a 30-m aircraft-like object for nose-on and broadside incidence, by direct measurement and by wire-grid modeling, whit good agreement. The 'generic aircraft' RCS is demonstrated to be dominated by the vertical stabilizer at low HF frequencies, but by the fuselage for broadside incidence at higher HF, in level flight.