benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 dall Dallesport_1990_NGS, 1993-08-11,  EE_ ,  USGS-CVO ,  ASHTECH LM-XII3,  005,  7A,  ASH700228A,  005,  NONE, 1.58, 1.626, 15, 211515
 dall Dallesport_1990_NGS, 1993-08-12,  EE_ ,  USGS-CVO ,  ASHTECH LM-XII3,  005,  7A,  ASH700228A,  005,  NONE, 1.592, 1.6379, 15, 211415
 dall Dallesport_1990_NGS, 1997-08-18,  unknown ,  CVO ,  Trimble 4000SSi,  14855,  NP,  TRM29659.00,  610170,  NONE, 1.1417, 0, 30, 13370
 dall Dallesport_1990_NGS, 1997-08-19,  unknown ,  CVO ,  Trimble 4000SSi,  14855,  NP,  TRM29659.00,  610170,  NONE, 1.1244, 0, 30, 135130
 dall Dallesport_1990_NGS, 2011-07-31,  McCaffrey ,  PSU ,  TRIMBLE NETR8,  5025K68483,  4.41,  TRM57971.00,  1441004073,  NONE, 1.4037, 1.458, 0, 360
 dall Dallesport_1990_NGS, 2003-11-06,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH701945E_M,  CR620022601,  NONE, 1.3854, 1.4329, 30, 15590