John Xun Yang is an Assistant Research Scientist at Earth System Science Interdisciplinary Center (ESSIC) and Cooperative Institute for Climate & Satellites-Maryland (CICS) of the University of Maryland. His research interest is Earth remote sensing. He received the PhD degree from the University of Michigan. He has over ten years experience in remote sensing engineering and technology including hardware development, calibration/validation, signal processing, and retrieval algorithms development. He has strong expertise in satellite microwave remote sensing, lidar and sunphotometer. He has involved in four NASA/NOAA satellite missions. He is a member of the NASA/JAXA Global Precipitation Measurement (GPM) mission and works on satellite radiometer calibration and science applications. He has done engineering work on building up an L-band radiometer and accessory data acquisition system to calibrate GPS simulators for the NASA Cyclone Global Navigation Satellite System (CYGNSS) mission. He did multiple field campaigns for the NASA Aquarius radiometer calibration. He works on inflight calibration/validation for NOAA/NASA Joint Polar Satellite System (JPSS) mission. He was the recipient of the first place prize at the 2013 Michigan Geophysical Union (MGU) Symposium, the ten finalists in the student paper contest of the 2015 International Geoscience and Remote Sensing Symposium (IGARSS), the 2016 NASA Science Team Award in Precipitation Measurement Mission (PMM). He has been a reviewer for a number of journals including IEEE Transaction on Geoscience and Remote Sensing, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (J-STARS), IEEE Geoscience and Remote Sensing Letters, Journal of Geophysical Research-Atmosphere (AGU), Earth and Space Science (AGU), Journal of Atmospheric and Oceanic Technology (AMS) etc.