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The Limb-imaging Ionospheric and Thermospheric Extreme-ultravioletSpectrograph (LITES) experiment is one of thirteen instruments aboard the SpaceTest Program Houston 5 (STP-H5) payload on the International Space Station.Along with the complementary GPS Radio Occultation and Ultraviolet Photometry-- Colocated (GROUP-C) experiment, LITES will investigate ionosphericstructures and variability relevant to the global ionosphere. The ISS has anorbital inclination of 51.6{\deg} which combined with its altitude of about 410km enables middle- and low-latitude measurements from slightly above the peakregion of the ionosphere. The LITES instrument features a 10{\deg} by 10{\deg}field of view which is collapsed horizontally, combining all information from agiven altitude. The instrument is installed such it looks in the wake of theISS and about 14.5{\deg} downwards in order to image altitudes ranging fromabout 350 km to 150 km. The actual viewing altitude and geometry is directlydependent on the pitch of the ISS, affecting the geophysical informationcaptured by the instrument.

Retrieving Instantaneous Field of View and Geophysical Information for Atmospheric Limb Sounding with USGNC Near Real-Time Orbit Data