benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 arzn ARZN_2006_USGS, 2018-12-17,  ELP ,  USGS ,  JAVAD TRE_G3TH,  00621,  SIGMA3.6.9,  JAVRINGANT_DM,  00488,  NONE, 0.7617, 0.8189, 15, 215545
 arzn ARZN_2006_USGS, 2006-11-17,  GDH ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.703, 0.7619, 30, 0
 arzn ARZN_2006_USGS, 2006-11-18,  GDH ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.703, 0.7619, 30, 0
 arzn ARZN_2006_USGS, 2006-11-19,  GDH ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.703, 0.7619, 30, 0
 arzn ARZN_2006_USGS, 2006-11-20,  GDH ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.703, 0.7619, 30, 0
 arzn ARZN_2006_USGS, 2008-07-30,  CHS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 0.5004, 0.5678, 30, 0
 arzn ARZN_2006_USGS, 2008-07-31,  CHS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 0.5004, 0.5678, 30, 0
 arzn ARZN_2006_USGS, 2008-08-01,  CHS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 0.5004, 0.5678, 30, 0
 arzn ARZN_2006_USGS, 2010-06-25,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR519993702,  NONE, 0.7597, 0.8169, 15, 162915
 arzn ARZN_2006_USGS, 2010-06-26,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR519993702,  NONE, 0.7597, 0.8169, 15, 0
 arzn ARZN_2006_USGS, 2010-06-27,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR519993702,  NONE, 0.7597, 0.8169, 15, 0
 arzn ARZN_2006_USGS, 2010-06-28,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR519993702,  NONE, 0.7597, 0.8169, 15, 0
 arzn ARZN_2006_USGS, 2018-12-18,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.6.9,  JAVRINGANT_DM,  00488,  NONE, 0.7617, 0.8189, 15, 0
 arzn ARZN_2006_USGS, 2018-12-19,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.6.9,  JAVRINGANT_DM,  00488,  NONE, 0.7617, 0.8189, 15, 0
 arzn ARZN_2006_USGS, 2018-12-20,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.6.9,  JAVRINGANT_DM,  00488,  NONE, 0.7617, 0.8189, 15, 0