Total and Spectral Solar Irradiance Sensor (TSIS) EVA Fitchecks

In the high bay of Kennedy Space Center's Space Station Processing Facility, Chris Hardcastle, left, of Stinger-Ghaffarian Technologies applies crew preference tape to the integrated Total and Spectral Solar Irradiance Sensor-1 (TSIS-1) payload and the EXPRESS Pallet Adapter. Hardcastle is joined by TSIS-1 payload team members from the Laboratory for Atmospheric and Space Physics, a Research Institute at the University of Colorado (Boulder). Standing from left to right are Tom Patton, Greg Ucker and Norm Perish. TSIS-1 is designed to measure the Sun's energy input into Earth by seeing how it is distributed across different wavelengths of light. These measurements help scientists establish Earth's total energy and how our planet's atmosphere responds to changes in the Sun's energy output. TSIS-1 will launch on SpaceX's 13th commercial resupply mission to the International Space Station.