benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 thor Thorne_1956_USC&GS, 1993-07-11,  BDK ,  USGS ,  ASHTECH LM-XII3,  763,  7A26,  ASH700228A,  0718,  NONE, 1.1063, 1.1568, 30, 23240
 thor Thorne_1956_USC&GS, 1992-08-14,  BDK ,  USGS ,  ASHTECH,  764 ,  LM-XII3 7A,  ASH700228A,  0598,  NONE, 1.2292, 1.2783, 30, 182130
 thor Thorne_1956_USC&GS, 1994-07-28,  BDK ,  USGS ,  ASHTECH,  623 ,  L-XII 7A,  ASH700228A,  683,  NONE, 1.1421, 1.1922, 30, 142930