Ecosystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) is a NASA mission to globally measure the temperature of plants. This is accomplished through the mission's single instrument: the Prototype Hyperspectral Infrared Imager Thermal Infrared Radiometer (PHyTIR). From its mounting aboard the International Space Station, PHyTIR measures the thermal infrared brightness temperatures (BT) of plants with a sensitivity of ≤0.1 Kelvin.
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