benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 emig, 1999-09-09,  WRT ,   ,  ASHTECH,  845 ,  Z-XII3 CD00,  ASH700936E_C,  CR16364,  NONE, 1.4004, 1.4478, 30, 16240
 emig, 1999-09-29,  WRT ,   ,  ASHTECH,  175 ,  Z-XII3 CD00,  ASH700936E_C,  CR16365,  NONE, 1.4055, 1.4528, 30, 155630
 emig Emig_DeptOfInterior_, 2003-06-18,  MCN ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 1.1995, 1.2489, 30, 153730
 emig Emig_DeptOfInterior_, 2003-07-03,  MCN ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 1.1934, 1.2428, 30, 154530
 emig Emig_DeptOfInterior_, 2008-09-15,  WRT ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 1.4308, 1.4779, 30, 1760
 emig Emig_DeptOfInterior_, 2013-09-04,  JLS ,  USGS ,  JAVAD,  00622 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14341,  NONE, 1.345, 1.3929, 15, 151415
 emig Emig_DeptOfInterior_, 2013-09-16,  WRT ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 1.339, 1.3869, 15, 16350