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Artists concept of the OSTM/Jason-2 spacecraft.

OSTM/Jason-2 Instruments

	Poseidon-3 dual frequency altimeter The Poseidon-3 radar altimeter is the main instrument on the Jason-2 mission. Derived from the Poseidon-1 altimeter on Topex/Poseidon and the Poseidon-2 on Jason-1, it measures sea level, wave heights and wind speed. Learn more   |   Watch the animation   |   Gallery
	Advanced Microwave Radiometer (AMR) The Advanced Microwave Radiometer (AMR), is an enhanced version of the Jason-1 Microwave Radiometer (JMR). Like the JMR, it acquires measurements via three separate frequency channels to determine the path delay of the altimeter's radar caused by atmospheric water vapor. Learn more   |   Watch the animation   |   Gallery
	DORIS The DORIS instrument onboard Jason-2 will provide real-time location and precise orbit determination. DORIS measurements are also used for geophysical studies. Learn more   |   Watch the animation   |   Gallery
	Global Positioning System Payload (GPSP) The GPSP is a tracking system that receives dual-frequency navigation signals continuously and simultaneously from 16 GPS satellites to determine the exact position of a transmitter. Learn more   |   Watch the animation   |   Gallery
	Laser Retroreflector Array (LRA) 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. Learn more   |   Watch the animation   |   Gallery