36.263 US Black Brant IX was launched from White Sands Missile Range on July 24, 2012. The mission objectives of the Degradation Free Spectrometers (DFS) for Solar Physics are to improve our knowledge of solar physics driven spectral variability over all solar cycle time scales through stable, radiometrically accurate spectral irradiance measurements in the highly dynamic EUV/soft X-ray range, demonstrate flight quality, degradation-free solar EUV and soft X-ray flight instruments and to provide well calibrated, significantly improved absolute irradiance measurements for intercalibration with on orbit EUV instrumentation. The Principal Investigator is Dr. Darrell Judge/University of Southern California.