benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 howe Howell_1972_NGS, 1997-08-18,  unknown ,  CVO ,  Trimble 4000SSi,  16417,  NP,  TRM29659.00,  66917,  NONE, 1.3287, 0, 30, 14730
 howe Howell_1972_NGS, 1997-08-19,  unknown ,  CVO ,  Trimble 4000SSi,  16417,  NP,  TRM29659.00,  66917,  NONE, 1.2024, 0, 30, 13580
 howe Howell_1972_NGS, 2012-07-27,  RM/ML ,  PSU ,  TRIMBLE 4000SSI,  14530,  NP,  TRM29659.00,  0220062092,  NONE, 0.9467, 0, 0, 31330
 howe Howell_1972_NGS, 1992-09-01,  GFS ,  USGS ,  ASHTECH,  623 ,  LM-XII3 6AJ2,  ASH700228A,  *683,  NONE, 1.3649, 1.4126, 30, 19320
 howe Howell_1972_NGS, 1994-08-20,  JMS ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 1.5407, 1.587, 30, 1580
 howe Howell_1972_NGS, 2000-07-25,  WHP ,   ,  ASHTECH,  4600 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.5163, 1.5628, 30, 145430