benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 hp93, 1994-06-10,  unknown ,  NGS ,  TRIMBLE 4000SST,  482,  4.81,  TRM14532.00,  20,  NONE, 2.22, 0, 15, 181830
 hp93, 1994-06-14,  unknown ,  NGS ,  TRIMBLE 4000SST,  482,  4.81,  TRM14532.00,  20,  NONE, 2.22, 0, 15, 18215
 hp93 HPGN_Calif_0903_1990, 2005-05-20,  JLS ,  USGS ,  ASHTECH,  LP020000801 ,  Z-XII3 CD00,  ASH701945E_M,  CR520031622,  NONE, 1.158, 1.2079, 30, 152030
 hp93 HPGN_Calif_0903_1990, 2005-05-25,  GDH ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 1.1823, 1.2319, 30, 163530
 hp93 HPGN_Calif_0903_1990, 2009-11-06,  JLS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14330,  NONE, 0.5992, 0.6618, 30, 164045
 hp93 HPGN_Calif_0903_1990, 2017-06-15,  JLS ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14329,  NONE, 0.5773, 0.6409, 15, 165815
 hp93 HPGN_Calif_0903_1990, 2017-06-16,  JLS ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14329,  NONE, 0.5773, 0.6409, 15, 0