TY - CONF AU - Weiss, Marc AU - Zhang, Victor AU - White, J AU - Senior, K AU - Matsakis, Demetrios AU - Mitchell, S. AU - Uhrich, P AU - Valat, D AU - Lewandowski, W AU - Petit, G. AU - Bauch, Andreas AU - Feldman, T. AU - Proia, A. C2 - 2011 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum, San Francisco, CA DA - 2011-07-31 LA - en PB - 2011 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum, San Francisco, CA PY - 2011 TI - Coordinating GPS Calibrations Among NIST, NRL, USNO, PTB, and OP ER -