Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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G01S
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
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15/00
Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
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G01S15/02
using reflection of acoustic waves
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G01S15/50
Systems of measurement, based on relative movement of the target
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G01S15/58
Velocity or trajectory determination systems; Sense-of-movement determination systems
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G01S15/60
wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track
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