benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 hp16 HPGN_01-06_1991_Cal_T, 1993-08-19,  JMS ,  USGS ,  ASHTECH LM-XII3,  107,  7A26,  ASH700228D,  *031,  NONE, 1.3277, 1.3757, 30, 20930
 hp16, 1994-04-22,  Steve Holdorff ,  National Geodetic Su,  TRIMBLE 4000,  1528,  SSE,  TRM14532.00,  20,  NONE, 2.22, 0, 15, 212830
 hp16, 1994-04-28,  Steve Holdorff ,  National Geodetic Su,  TRIMBLE 4000,  1552,  SSE,  TRM14532.00,  19,  NONE, 2.22, 0, 15, 162530
 hp16 HPGN_01-06_1991_Cal_, 1994-09-17,  JMS ,  USGS ,  ASHTECH,  104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.3981, 1.4455, 30, 161630
 hp16 HPGN_01-06_1991_Cal_, 2001-07-13,  GDH ,   ,  ASHTECH,  O4597 ,  Z-XII3 CC00,  ASH700936D_M,  CR14341,  NONE, 1.2105, 1.2598, 30, 163430
 hp16 HPGN_01-06_1991_Cal_, 2001-07-16,  CHS ,   ,  ASHTECH,  O4582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992805,  NONE, 1.3267, 1.3748, 30, 154930
 hp16 HPGN_01-06_1991_Cal_, 2004-07-25,  JMS ,  USGS ,  ASHTECH,  LP020000801 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993706,  NONE, 1.4459, 1.4929, 30, 16530