benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 hp15 HPGN_01-05_1991_CalTr, 1993-09-23,  Tsai Yeon-Jyn ,  UNKNOWN ,  TRIMBLE 4000SSE,  3335A03871,  NP,  TRM14532.00,  3334A69086,  NONE, 1.2414, 0, 30, 16520
 hp15 HPGN_01-05_1991_CalTr, 1993-09-24,  Tsai Yeou-Jyh ,  UNKNOWN ,  TRIMBLE 4000SSE,  3335A03871,  NP,  TRM14532.00,  3334A69086,  NONE, 1.1427, 0, 30, 15240
 hp15, 1994-04-29,  Steve Holdorff ,  National Geodetic Su,  TRIMBLE 4000,  1502,  SSE,  TRM14532.00,  18,  NONE, 2.22, 0, 15, 162945
 hp15 HPGN_01-05_1991_CalTr, 2018-05-21,  ELP ,  USGS ,  JAVAD TRE_G3TH,  01660,  SIGMA3.5.14,  JAVRINGANT_DM,  01592,  NONE, 0.6896, 0.7489, 15, 215645
 hp15 HPGN_01-05_Cal_Trans, 1994-09-18,  GDH ,  USGS ,  ASHTECH,  765 ,  LM-XII3 7A,  ASH700228D,  1058,  NONE, 1.4031, 1.4505, 30, 17420
 hp15 HPGN_01-05_Cal_Trans, 2001-07-10,  CHS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.3257, 1.3738, 30, 16120
 hp15 HPGN_01-05_Cal_Trans, 2001-07-11,  JMS ,   ,  ASHTECH,  lp019992809 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992805,  NONE, 1.3045, 1.3528, 30, 16440
 hp15 HPGN_01-05_1991_Cal_, 2004-07-13,  JLS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE00,  ASH700936D_M,  CR14244,  NONE, 0.407, 0.4808, 30, 165430
 hp15 HPGN_01-05_1991_Cal_, 2004-07-14,  JLS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE00,  ASH700936D_M,  CR14244,  NONE, 0.407, 0.4808, 30, 0
 hp15 HPGN_01-05_1991_Cal_, 2004-07-15,  JLS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE00,  ASH700936D_M,  CR14244,  NONE, 0.407, 0.4808, 30, 0
 hp15 HPGN_01-05_1991_Cal_, 2004-07-16,  JLS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE00,  ASH700936D_M,  CR14244,  NONE, 0.407, 0.4808, 30, 0
 hp15 HPGN_01-05_1991_CalT, 2013-04-21,  JLS ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.5773, 0.6409, 15, 161045
 hp15 HPGN_01-05_1991_CalT, 2013-04-22,  JLS ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.5773, 0.6409, 15, 0
 hp15 HPGN_01-05_1991_CalT, 2013-04-23,  JLS ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.5773, 0.6409, 15, 0
 hp15 HPGN_01-05_1991_CalT, 2013-04-24,  JLS ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.5773, 0.6409, 15, 0
 hp15 HPGN_01-05_1991_CalT, 2018-05-22,  ELP ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  01592,  NONE, 0.6896, 0.7489, 15, 0
 hp15 HPGN_01-05_1991_CalT, 2018-05-23,  ELP ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  01592,  NONE, 0.6896, 0.7489, 15, 0
 hp15 HPGN_01-05_1991_CalT, 2018-05-24,  ELP ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  01592,  NONE, 0.6896, 0.7489, 15, 0
 hp15 HPGN_01-05_1991_CalT, 2018-05-25,  ELP ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  01592,  NONE, 0.6896, 0.7489, 15, 0