NASA's Ecosystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) instrument, the Prototype Hyperspectral Infrared Imager Thermal Infrared Radiometer (PHyTIR), aims to measure the temperature of plants all across Earth. From its position aboard the International Space Station, PHyTIR measures the thermal infrared brightness temperatures of plants with a sensitivity of ≤0.1 Kelvin.
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