benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 ptan, 1994-08-10,  David Verdonck ,  Univ of Wash ,  TRIMBLE 4000SSE,  3448,  Nav,  TRM14532.00,  68504,  NONE, 1.6752, 0, 15, 1310
 ptan, 1996-06-10,  unknown ,  CVO ,  Trimble 4000SSi,  14855,  NP,  TRM29659.00,  610700,  NONE, 1.5839, 0, 30, 125630
 ptan, 1996-06-11,  unknown ,  CVO ,  Trimble 4000SSi,  14855,  NP,  TRM29659.00,  610170,  NONE, 1.5839, 0, 30, 12570
 ptan, 1996-06-12,  unknown ,  CVO ,  Trimble 4000SSi,  14855,  NP,  TRM29659.00,  610170,  NONE, 1.5839, 0, 30, 124630
 ptan, 1996-06-13,  unknown ,  CVO ,  Trimble 4000SSi,  14855,  NP,  TRM29659.00,  610170,  NONE, 1.5839, 0, 30, 125030
 ptan, 1996-06-14,  unknown ,  CVO ,  Trimble 4000SSi,  14855,  NP,  TRM29659.00,  610170,  NONE, 1.5839, 0, 30, 124830
 ptan, 1996-06-15,  unknown ,  CVO ,  Trimble 4000SSi,  14855,  NP,  TRM29659.00,  610170,  NONE, 1.5839, 0, 30, 12430