TY - JOUR AU - T. Parker AU - Judah Levine BT - IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control DA - Jan-11-1997 DO - 10.1109/58.656627 PY - 1997 SP - 1239 EP - 1244 T2 - IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control TI - Impact of new high stability frequency standards on the performance of the NIST AT1 time scale VL - 44 SN - 0885-3010 ER -