benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 mry1 Marymoor_Rm1_1972_NC, 1994-08-14,  SKW ,  USGS ,  ASHTECH,  104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.4594, 1.5063, 30, 143230
 mry1 Marymoor_Rm1_1972_NC, 1994-08-15,  WDN ,  USGS ,  ASHTECH,  104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.4744, 1.5212, 30, 14320