TY - CONF AU - Stefania Romisch AU - Steven Jefferts AU - Thomas Parker C2 - Proceedings of 2011 General Assembly and Scientific Symposium of International Union of Radio Science (URSI), Istanbul, -1 DA - 2011-08-13 LA - en PB - Proceedings of 2011 General Assembly and Scientific Symposium of International Union of Radio Science (URSI), Istanbul, -1 PY - 2011 TI - A digital time scale at the National Institute of Standards and Technology ER -