benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 d850 D850_RESET_1971_USCG, 2007-05-30,  JLS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.155, 1.2049, 30, 142230
 d850 D850_RESET_1971_USCG, 2007-06-02,  JLS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.1651, 1.2149, 30, 132830
 d850 D850_RESET_1971_USCG, 2009-02-22,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.3935, 1.441, 30, 161630
 d850 D850_RESET_1971_USCG, 2009-02-23,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.4328, 1.4799, 30, 16160
 d850 D850_RESET_1971_USCG, 2011-05-14,  CHS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 1.4348, 1.4819, 15, 15845
 d850 D850_RESET_1971_USCG, 2011-05-15,  CHS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 1.4066, 1.4539, 15, 151145
 d850 D850_RESET_1971_USCG, 2016-02-06,  ELP ,  USGS ,  JAVAD,  01658 ,  TRE_G3TH SIGMA3.5.9,  JAVRINGANT_DM,  00587,  NONE, 1.1833, 1.2329, 15, 15160
 d850 D850_RESET_1971_USCG, 2016-02-07,  ELP ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  00580,  NONE, 1.2642, 1.3129, 15, 14470