TY - GEN AU - Howard Yoon AU - Charles Gibson C2 - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD DA - 2011-07-25 DO - https://doi.org/10.6028/NIST.SP.250-89 LA - en PB - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD PY - 2011 TI - SP250 Spectral Irradiance Calibrations ER -