benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 trgo, 2000-09-18,  APS ,   ,  ASHTECH,  174 ,  Z-XII3 CD00,  ASH700936E_C,  CR16376,  NONE, 0.4078, 0.4815, 30, 15430
 trgo, 2000-09-25,  APS ,   ,  ASHTECH,  174 ,  Z-XII3 CD00,  ASH700936E_C,  CR16376,  NONE, 0.4165, 0.4895, 30, 152230
 trgo, 2004-09-21,  RWB ,  USGS ,  TRIMBLE,  21140 ,  4000SSI NP,  TRM29659.00,  05208,  NONE, 1.1054, 0, 0, 162530
 trgo, 2004-09-22,  RWB ,  USGS ,  TRIMBLE,  21140 ,  4000SSI NP,  TRM29659.00,  05208,  NONE, 1.1054, 0, 0, 0
 trgo TRGO_USGS, 2009-09-28,  WRT ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 1.3561, 1.4039, 30, 174730
 trgo TRGO_USGS, 2009-09-29,  WRT ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 1.3561, 1.4039, 30, 0