@conference{179111, author = {Jason Stalnaker and Scott Diddams and Leo Hollberg and Kyoungsik Kim and Elizabeth Donley and Thomas Heavner and Steven Jefferts and Filippo Levi and Thomas Parker and James Bergquist and Wayne Itano and Marie Jensen and Luca Lorini and Windell Oskay and Tara Fortier and J Torgerson}, title = {Absolute Optical Frequency Measurements with a Fractional Uncertainty at 1 x 10-15}, year = {2006}, month = {2006-06-05}, publisher = {Proc. 2006 Freq. Cont. Symp.}, url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50392}, language = {en}, }