benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 bl91 Black_1991_YM_Caltech, 1993-10-17,  UNKNOWN ,  UNKNOWN ,  TRIMBLE 4000SST,  2949A00423,  NP,  TRM14532.00,  3006A00028,  NONE, 1.1397, 0, 30, 17120
 bl91 Black_1991_YM_Caltech, 1993-10-18,  UNKNOWN ,  UNKNOWN ,  TRIMBLE 4000SST,  2949A00423,  NP,  TRM14532.00,  3006A00028,  NONE, 1.0693, 0, 30, 16310
 bl91 Black_1991_YM_Caltech, 1993-10-19,  UNKNOWN ,  UNKNOWN ,  TRIMBLE 4000SST,  2949A00423,  NP,  TRM14532.00,  3006A00028,  NONE, 1.0693, 0, 30, 0
 bl91 Black_1991_YM_Caltech, 1994-10-21,  UNKNOWN ,  UNKNOWN ,  TRIMBLE 4000SSE,  3414A05699,  NP,  TRM22020.00+GP,  0080098261,  NONE, 1.0945, 0, 30, 153030
 bl91 Black_1991_YM_Caltech, 1994-10-23,  UNKNOWN ,  UNKNOWN ,  TRIMBLE 4000SSE,  3337A03973,  NP,  TRM22020.00+GP,  80053868,  NONE, 1.3162, 0, 30, 171630
 bl91 Black_1991_YM_Caltech, 1995-10-14,  UNKNOWN ,  UNKNOWN ,  TRIMBLE 4000SSE,  3442A08396,  NP,  TRM22020.00+GP,  0220007307,  NONE, 1.1822, 0, 30, 11830
 bl91 Black_1991_YM_Caltech, 1996-08-31,  Stirewalt/Abolins ,  UNKNOWN ,  TRIMBLE 4000SSE,  3526A11508,  NP,  TRM22020.00+GP,  0220024323,  NONE, 1.1852, 0, 30, 5530
 bl91 Black_1991_YM_Caltech, 1996-09-01,  Stirewalt/Abolins ,  UNKNOWN ,  TRIMBLE 4000SSE,  3526A11508,  NP,  TRM22020.00+GP,  0220024323,  NONE, 1.1852, 0, 30, 0
 bl91 Black_1991_YM_Caltech, 2002-09-25,  Wernicke Cooksey ,  UNKNOWN ,  TRIMBLE 4000SSE,  3337A03970,  NP,  TRM22020.00+GP,  0220050367,  NONE, 1.1765, 0, 30, 290
 bl91 Black_1991_YM_Caltec, 1993-05-05,  JMS ,  USGS ,  ASHTECH,  107 ,  LM-XII3 6M24,  ASH700228D,  *031,  NONE, 1.1345, 1.1847, 30, 3030
 bl91 Black_1991_YM_Caltec, 1993-05-06,  KWC ,  USGS ,  ASHTECH,  107 ,  LM-XII3 6M24,  ASH700228D,  *031,  NONE, 1.1376, 1.1877, 30, 3030
 bl91 Black_1991_YM_Caltec, 1998-06-03,  CHS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936D_M,  CR14330,  NONE, 1.2318, 1.2808, 30, 30
 bl91 Black_1991_YM_Caltec, 1998-06-04,  CHS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936D_M,  CR14330,  NONE, 1.2318, 1.2808, 30, 30