Meet the GPM Flight Project Team

It takes hundreds of designers, engineers and technicians to build the largest spacecraft ever assembled at NASA's Goddard Space Flight Center, the GPM Core Observatory. Check out a few of the team leads who made it happen.



Alexia Harper: Mechanical Engineer


Bill Paradis: Planner & Scheduler


Carlton Peters: Thermal Product Development Lead


Dave McComas: Flight Software Development Lead


Keith Deweese: Guidance and Navigation Control Lead


Lynnett Marbley: Chief Safety and Mission Assurance Officer


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  • The Tropical Rainfall Measuring Mission (TRMM) spacecraft re-entered the Earth’s atmosphere on June 15, 2015, at 11:55 p.m. EDT, over the South Indian Ocean, according to the U.S. Strategic Command’s Joint Functional Component Command for Space through...
  • The Precipitation Processing System (PPS) has begun producing updated GPM radiometer products as of 12/4/2014 due to an error discovered in the calculation of the Sun Angle in the PPS Geolocation Toolkit. This is considered a minor update with the...
  • The TRMM satellite is descending, and the users of TRMM Precipitation Radar (PR) data should be aware that the last production orbit of public PR data was orbit #96230 from October 7th, 2014. From that point forward, the TRMM PR data is suspended because...