SSULI is an optical remote sensing instrument that scans the limb of the earth in the orbital plane in a sun-synchronous orbit.
An experiment that consists of three high spectral resolution ultraviolet spectrographs designed to measure the naturally occurring
thermospheric and ionospheric airglow.
A satellite experiment designed to perform a comprehensive study of upper atmospheric airglow emissions.
A calibration control system
is used to calibrate ultraviolet instruments and simulate on-orbit conditions.