Systems using reradiation of electromagnetic waves other than radio waves, e.g. IFF, i.e. identification of friend or foe

Full Title

Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems > Systems using reradiation of electromagnetic waves other than radio waves, e.g. IFF, i.e. identification of friend or foe

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES