benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 h623 H623_1942_USC&GS, 2007-04-04,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 1.2713, 1.3199, 30, 16230
 h623 H623_1942_USC&GS, 2007-04-05,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.244, 1.2929, 30, 151230
 h623 H623_1942_USC&GS, 2012-06-12,  JLS ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 1.3006, 1.3489, 15, 152045
 h623 H623_1942_USC&GS, 2012-06-13,  JLS ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 1.3349, 1.3829, 15, 151015
 h623 H623_1942_USC&GS, 2013-11-19,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.4812, 1.5279, 15, 17245
 h623 H623_1942_USC&GS, 2013-11-20,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.4499, 1.4969, 15, 164115
 h623 H623_1942_USC&GS, 2019-04-03,  ELP ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  00587,  NONE, 0.6253, 0.6868, 15, 16530
 h623 H623_1942_USC&GS, 2019-04-04,  ELP ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  00587,  NONE, 1.1874, 1.2369, 15, 133345