GHRC Engineer Kathryn Regner and software developer Dr. Amy Lin, both of UAH, attended the Critical Design Review for the Lightning Imaging Sensor (LIS) instrument on International Space Station (ISS) on April 15, 2014. Ms. Regner presented charts showing the planned hardware architecture and data flow. NASA and UAH developed the space-based lightning observatory as a remote sensing tool under the Earth Observing System (EOS) program for the Tropical Rainfall Measuring Mission (TRMM). LIS on the ISS will extend TRMM time series observations, expand latitudinal coverage, and provide real time observations in support of important and pressing science and applications objectives. The flight qualified spare will be flown as a hosted payload on the Department of Defense (DoD) Space Test Program (STP) H5 mission and launched on the SpaceX Dragon in February 2016 for a planned two-year mission.