TY - CONF AU - E Thompson AU - E Early C2 - Proceedings of the 1999 SPIE Meeting, Undefined DA - 1999-07-23 00:07:00 LA - en PB - Proceedings of the 1999 SPIE Meeting, Undefined PY - 1999 TI - Portable High Accuracy Double Spectrometer for Ultraviolet Spectral Irradiance Measurements ER -