benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 01ff, 2010-01-23,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH700936D_M,  CR14330,  NONE, 1.461, 1.5079, 15, 17415
 01ff, 2010-01-25,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH700936D_M,  CR14330,  NONE, 1.3612, 1.4089, 15, 171415
 01ff, 2011-02-23,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 1.4156, 1.4629, 15, 165640
 01ff, 2011-04-19,  CHS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 1.4771, 1.5239, 15, 152345
 01ff 01-FF_1993_Caltrans, 2012-07-11,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 1.602, 1.6479, 15, 153545
 01ff 01-FF_1993_Caltrans, 2012-07-12,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 1.5799, 1.6259, 15, 154645
 01ff 01-FF_1993_Caltrans, 2016-04-27,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH701945B_M,  CR619992805,  NONE, 1.3329, 1.3809, 15, 133345
 01ff 01-FF_1993_Caltrans, 2017-08-19,  ELP ,  USGS ,  JAVAD,   ,  TRE_G3TH SIGMA3.5.1,  ASH701945E_M,  CR620022605,  NONE, 0.8376, 0.8929, 15, 141930