benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 hp19 HPGN_01-09_1991_Cal_T, 1993-08-18,  JLS ,  USGS ,  ASHTECH LM-XII3,  099,  7A26,  ASH700228D,  1036,  NONE, 1.1587, 1.2086, 30, 211230
 hp19 HPGN_01-09_1991_Cal_T, 1993-08-21,  SKW ,  USGS ,  ASHTECH LM-XII3,  0831,  7A,  ASH700228A,  1027,  NONE, 1.4021, 1.4495, 30, 213230
 hp19, 1994-04-29,  Steve Holdorff ,  National Geodetic Su,  TRIMBLE 4000,  1571,  SSE,  TRM14532.00,  747,  NONE, 2.22, 0, 15, 162615
 HP19, 2000-04-23,  TBW ,  Humboldt_State_Univ ,  TRIMBLE 4000SSI,  24489,  NP,  TRM22020.00+GP,  38191,  NONE, 1.1124, 0, 30, 30
 hp19 HPGN_Calif_Sta_01-09, 1992-06-12,  WKG ,  USGS ,  ASHTECH,  0831 ,  LM-XII3 7A24,  ASH700228A,  0616,  NONE, 1.39, 1.4375, 30, 2330
 hp19 HPGN_01-09_1991_Cal_, 1993-08-20,  CHS ,  USGS ,  ASHTECH,  762 ,  LM-XII3 7A26,  ASH700228A,  0745,  NONE, 0.6154, 0.6774, 30, 204630
 hp19 HPGN_01-09_1991_Cal_, 1994-08-23,  JMS ,  USGS ,  ASHTECH,  763 ,  LM-XII3 7A,  ASH700228A,  0718,  NONE, 1.4282, 1.4753, 30, 17220
 hp19 HPGN_01-09_1991_Cal_, 1994-09-15,  JMS ,  USGS ,  ASHTECH,  104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.3026, 1.3509, 30, 15310
 hp19 HPGN_01-09_1991_Cal_, 2001-07-12,  JMS ,   ,  ASHTECH,  801 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992805,  NONE, 1.689, 1.7343, 30, 1760
 hp19 HPGN_01-09_1991_Cal_, 2001-07-16,  JLS ,   ,  ASHTECH,  LP00108.707 ,  Z-XII3 CC00,  ASH700936D_M,  CR14333,  NONE, 1.2288, 1.2778, 30, 15480
 hp19 HPGN_01-09_1991_Cal_, 2004-07-24,  JLS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE00,  ASH700936D_M,  CR14329,  NONE, 1.4681, 1.5149, 30, 155330
 hp19 HPGN_Calif_Sta_01-09, 2005-06-20,  JLS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.3632, 1.4109, 30, 14370
 hp19 HPGN_Calif_Sta_01-09, 2005-06-22,  CHS ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.5033, 1.5499, 30, 15230