benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 6240 6240_USGS, 2012-08-08,  CHS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 0.7905, 0.8469, 15, 0
 6240 6240_USGS, 2012-08-09,  CHS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 0.7905, 0.8469, 15, 0
 6240 6240_USGS, 2012-08-10,  CHS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 0.7905, 0.8469, 15, 0
 6240 6240_USGS, 2015-07-08,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 0.7401, 0.7978, 15, 152845
 6240 6240_USGS, 2015-07-09,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 0.7401, 0.7978, 15, 0
 6240 6240_USGS, 2015-07-10,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 0.7401, 0.7978, 15, 0
 6240 6240_USGS, 2015-07-11,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 0.7401, 0.7978, 15, 0
 6240 6240_USGS, 2015-07-12,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 0.7401, 0.7978, 15, 0
 6240 6240_USGS, 2017-07-11,  JLS ,  USGS ,  JAVAD,  01661 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14244,  NONE, 0.7267, 0.7848, 15, 19630
 6240 6240_USGS, 2017-07-12,  JLS ,  USGS ,  JAVAD,  01661 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14244,  NONE, 0.7267, 0.7848, 15, 0
 6240 6240_USGS, 2017-07-13,  JLS ,  USGS ,  JAVAD,  01661 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14244,  NONE, 0.7267, 0.7848, 15, 0
 6240 6240_USGS, 2017-07-14,  JLS ,  USGS ,  JAVAD,  01661 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14244,  NONE, 0.7267, 0.7848, 15, 0