benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 ihr1, 2001-09-15,  CWW ,   ,  ASHTECH,  02275 ,  Z-XII3 CC00,  ASH700936A_M,  12658,  NONE, 1.469, 0, 30, 15550
 ihr1, 2001-09-21,  WCH ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.3328, 1.3808, 30, 16930
 ihr1 IHR1_USGS, 2005-09-13,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945E_M,  CR520031615,  NONE, 0.4834, 0.5519, 30, 0
 ihr1 IHR1_USGS, 2005-09-14,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945E_M,  CR520031615,  NONE, 0.4834, 0.5519, 30, 0
 ihr1 IHR1_USGS, 2016-09-09,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR520031615,  NONE, 0.7514, 0.8088, 15, 0
 ihr1 IHR1_USGS, 2016-09-10,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR520031615,  NONE, 0.7514, 0.8088, 15, 0
 ihr1 IHR1_USGS, 2016-09-11,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR520031615,  NONE, 0.7514, 0.8088, 15, 0