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This paper describes current status of the level 1 algorithm development and calibration for the Dual-frequency Precipitation Radar (DPR) onboard the Global Precipitation Measurement (GPM). JAXA has carried out the calibration for the DPR since the GPM core observatory was launched on February 28, 2014 (JST). As a result of the external calibration, it is detected that some biases seemed to exist...
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