benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 1103 HPGN_Calif_11-03_1990, 1994-03-24,  M.L. BERGMAN ,  NGS ,  TRIMBLE 4000,  1531,  SSE,  TRM14532.00,  16,  NONE, 2.22, 0, 30, 182030
 1103 HPGN_Calif_11-03_1990, 1995-04-13,  -Unknown- ,  CALIF DEPT TRANSPORT,  TRIMBLE 4000,  7369,  SSE,  TRM14532.00,  SN_UNKNOWN,  NONE, 2.217, 0, 15, 153015
 1103 HPGN_Calif_11-03_1990, 1995-04-17,  -Unknown- ,  CALIF DEPT TRANSPORT,  TRIMBLE 4000,  7369,  SSE,  TRM14532.00,  SN_UNKNOWN,  NONE, 2.217, 0, 15, 191815
 1103 HPGN_Calif_11-03_199, 2010-04-09,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.3733, 1.4209, 15, 155745
 1103 HPGN_Calif_11-03_199, 2010-04-11,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 1.3945, 1.4419, 15, 15540