Satellite photographs of the impact range where the missile's dummy warheads hit showed that in addition to its main warhead, there were six or seven dummies known in the Pentagon as ''penetration aids,'' the paper said.
His areas of expertise include radar-system analysis, electronic warfare, weapon-system simulation, penetration aids for ballistic missiles, target-signaturecharacteristics, ballistic-missile-trajectory and guidance analysis, countermortar radars, meteorological radar, Doppler meteorological radar, millimeter-submillimeter-wave radar, millimeter-/submillimeter-wave propagation, and magnetic bubbles.