benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 bkhk BKHK_USGS, 2009-10-22,  CHS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.3208, 1.3689, 30, 154045
 bkhk BKHK_USGS, 2009-10-27,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR520031615,  NONE, 1.2743, 1.3229, 30, 152515
 bkhk BKHK_USGS, 2010-11-17,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945B_M,  CR619992801,  NONE, 0.8274, 0.8829, 15, 163815
 bkhk BKHK_USGS, 2010-11-18,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945B_M,  CR619992801,  NONE, 0.8857, 0.9399, 15, 163115
 bkhk BKHK_USGS, 2012-04-25,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 1.3369, 1.3849, 15, 153215
 bkhk BKHK_USGS, 2012-04-26,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 0.8182, 0.8739, 15, 155015
 bkhk BKHK_USGS, 2017-11-02,  ELP ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  01592,  NONE, 0.7874, 0.8439, 15, 14480
 bkhk BKHK_USGS, 2017-11-03,  ELP ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  01592,  NONE, 0.7874, 0.8439, 15, 144615