benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 pt12 PT12_USGS, 2007-03-24,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 1.3723, 1.4199, 30, 15180
 pt12 PT12_USGS, 2007-03-25,  GDH ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII 1L00,  ASH701945E_M,  CR620022605,  NONE, 1.455, 1.5019, 30, 152330
 pt12 PT12_USGS, 2009-05-13,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 1.5245, 1.5709, 30, 152630
 pt12 PT12_USGS, 2009-05-27,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR519993703,  NONE, 1.4933, 1.54, 30, 15190