benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 k589, 1999-09-17,  WRT ,   ,  ASHTECH,  175 ,  Z-XII3 CD00,  ASH700936E_C,  CR16364,  NONE, 0.5854, 0.6486, 30, 16430
 k589, 1999-09-27,  GWB ,  USGS ,  ASHTECH,  278 ,  Z-XII3 CD00,  ASH700936E_C,  CR16379,  NONE, 0.9833, 1.0357, 30, 1680
 k589, 2003-06-20,  SAH ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022602,  NONE, 1.1104, 1.1609, 30, 16120
 k589, 2003-07-02,  SAH ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022602,  NONE, 1.1367, 1.1868, 30, 163030
 k589 K589_1956_USC&GS, 2013-09-14,  JLS ,  USGS ,  JAVAD,  00619 ,  TRE_G3TH SIGMA3.3.1,  ASH701945B_M,  CR519993703,  NONE, 0.7628, 0.8199, 15, 144915