Our current government projects include a NASA Phase II SBIR entitled "Rugged Low-Temperature Actuators for Tunable Fabry-Perot Optical Filters," where we are developing an actuator that will work at operational temperatures near 100 K and survive a launch cycle, and a NASA contract with the "Living with a Star" Program entitled "Oxygen Profiling Infrared Experiment (OPIE)," where we are developing a spectral radiometer for terahertz radiation that will be used to profile the mesospheric atomic oxygen content.