Satellite Laser Ranging (SLR) achieves high accuracy by precisely measuring what property of a laser pulse traveling to an orbiting satellite and back?
Answer
The time it takes for the light pulse to travel
SLR involves firing laser pulses at satellites and measuring the round-trip time. Since the speed of light is known with extremely high accuracy, this time measurement allows the distance to the satellite to be calculated to within a few millimeters.
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