benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 swan, 2001-09-16,  GB ,  USGS ,  TRIMBLE 4000SSI,  3608A14631,  NP,  TRM29659.00,  0220073541,  NONE, 1.384, 0, 0, 16150
 swan, 2001-09-24,  WCH ,   ,  ASHTECH Z-XII3,  lp019992804,  CD00,  ASH700936D_M,  CR14329,  NONE, 1.3459, 1.3938, 30, 141930
 swan Swan_USGS, 2006-09-12,  CHS ,  USGS ,  ASHTECH Z-X,  ZE1200331017,  ZE21,  ASH700936D_M,  CR14244,  NONE, 1.3258, 1.3738, 30, 165130
 swan Swan_USGS, 2006-09-13,  CHS ,  USGS ,  ASHTECH Z-X,  ZE1200331017,  ZE21,  ASH700936D_M,  CR14244,  NONE, 1.3258, 1.3738, 30, 0
 swan Swan_USGS, 2012-09-14,  JMS ,  USGS ,  ASHTECH Z-X,  ZE120023208,  ZE210A13,  ASH701945E_M,  CR620022602,  NONE, 1.3279, 1.3759, 15, 17200
 swan Swan_USGS, 2012-09-15,  JMS ,  USGS ,  ASHTECH Z-X,  ZE120023208,  ZE210A13,  ASH701945E_M,  CR620022602,  NONE, 1.3279, 1.3759, 15, 0
 swan Swan_USGS, 2012-09-16,  JMS ,  USGS ,  ASHTECH Z-X,  ZE120023208,  ZE210A13,  ASH701945E_M,  CR620022602,  NONE, 1.3279, 1.3759, 15, 0