LRA > Laser Retroreflector ArrayreflectorInstrument Type: reflector, Operational Mode: , Collection Type: TBD, Other Information: The LRA is an array of mirrors that provide a target for laser tracking measurements from the ground. By analyzing the round-trip time of the laser beam, we can locate where the satellite is on its orbit. It is a totally passive reflector designed to reflect laser pulses back to their point of origin on Earth. It is used for the calibration of the Precise Orbit Determination system on the spacecraft.