36.289 US Terrier-Black Brant was launched from White Sands Missile Range on July 22, 2014. This was a re-fly of the 36.263 payload that contained the new prototype experiment instruments known as the Degradation Free Spectrometers (DFS) for Solar Physics. The mission objectives 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. These are improvements on the previous work for SDO/EVE/ESP and SOHO/SEM.

- Demonstrate flight quality, degradation-free solar EUV and soft X-ray flight instruments such as the Dual Grating Spectrometer (DGS) and the Optics- Free Spectrometer (OFS).

- Provide well calibrated, significantly improved absolute irradiance measurements (with instrument response functions measured at the NIST SURF synchrotron facility) for inter-calibration with on-orbit EUV instrumentation.

The Principal Investigator is Dr. Leonid Didkovsky/University of Southern California.

For more information about this mission, visit:
http://www.nasa.gov/content/goddard/mission-to-study-the-suns-energy/