benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 greg Gregor_1989_USGS, 1992-03-18,  JMS ,  USGS ,  ASHTECH LM-XII3,  765,  6b,  ASH700228D,  1058,  NONE, 1.1588, 1.2087, 30, 52730
 greg Gregor_1989_USGS, 1993-02-02,  KWC ,  USGS ,  ASHTECH LM-XII3,  763,  6M24,  ASH700228A,  0718,  NONE, 1.1829, 1.2325, 30, 10490
 greg Gregor_1989_USGS, 1993-05-20,  WKG ,  USGS ,  ASHTECH LM-XII3,  0831,  6M24,  ASH700228A,  1027,  NONE, 1.4322, 1.4793, 30, 32230
 greg Gregor_1989_USGS, 1994-01-11,  WKG ,  USGS ,  ASHTECH LM-XII3,  765,  7A,  ASH700228D,  1058,  NONE, 1.2393, 1.2882, 30, 17570
 greg Gregor_1989_USGS, 1994-05-05,  JMS ,  USGS ,  ASHTECH LM-XII3,  764,  7A,  ASH700228A,  0598,  NONE, 1.199, 1.2484, 30, 14130
 greg Gregor_1989_USGS, 1995-10-03,  GDH ,  USGS ,  ASHTECH Z-XII3,  707,  1F00,  ASH700718B,  11404,  NONE, 1.2622, 1.3109, 30, 162830
 greg Gregor_1989_USGS, 1996-06-12,  CHS ,  USGS ,  ASHTECH Z-XII3,  *LP00141,  1F00,  ASH700718B,  11416,  NONE, 1.3681, 1.4158, 30, 1670
 greg Gregor_1989_USGS, 1997-09-23,  JMS ,  USGS ,  ASHTECH Z-XII3,  O4579,  1E95,  ASH700936D_M,  CR14341,  NONE, 1.4811, 1.5278, 30, 15440
 greg Gregor_1989_USGS, 1997-10-02,  CHS ,  USGS ,  ASHTECH Z-XII3,  O4597,  1E95,  ASH700936D_M,  CR14329,  NONE, 1.3631, 1.4108, 30, 15230
 greg Gregor_1989_USGS, 1999-03-08,  JMS ,  USGS ,  ASHTECH Z-XII3,  4600,  CB00,  ASH700936D_M,  CR14329,  NONE, 1.2196, 1.2688, 30, 164730
 greg Gregor_1989_USGS, 1999-03-09,  CHS ,  USGS ,  ASHTECH Z-XII3,  LP03450,  CB00,  ASH700936D_M,  CR14341,  NONE, 1.3409, 1.3888, 30, 16320
 greg Gregor_1989_USGS, 2001-04-02,  JMS ,   ,  ASHTECH Z-XII3,  O4597,  CC00,  ASH701945B_M,  CR519993703,  NONE, 1.3782, 1.4258, 30, 162730
 greg Gregor_1989_USGS, 2001-04-03,  CHS ,   ,  ASHTECH Z-XII3,  lp019992803,  CD00,  ASH700936D_M,  CR14341,  NONE, 1.2803, 1.3288, 30, 15370
 greg Gregor_1989_USGS, 2005-03-21,  JMS ,  USGS ,  ASHTECH Z-X,  ZE1200331017,  ZE21,  ASH701945E_M,  CR620022602,  NONE, 1.3501, 1.3979, 30, 165530
 greg Gregor_1989_USGS, 2005-03-23,  JMS ,  USGS ,  ASHTECH Z-X,  ZE1200331017,  ZE21,  ASH701945E_M,  CR620022602,  NONE, 1.2875, 1.336, 30, 164830
 greg Gregor_1989_USGS, 2012-02-07,  JMS ,  USGS ,  ASHTECH Z-X,  ZE1200331006,  ZE210A13,  ASH701945E_M,  CR620022602,  NONE, 1.3824, 1.43, 15, 163915
 greg Gregor_1989_USGS, 2012-02-09,  JMS ,  USGS ,  ASHTECH Z-X,  ZE1200331006,  ZE210A13,  ASH701945E_M,  CR520031622,  NONE, 0.8223, 0.8779, 15, 17445
 greg Gregor_1989_USGS, 2017-03-15,  ELP ,  USGS ,  JAVAD TRE_G3TH,  01337,  SIGMA3.5.14,  JAVRINGANT_DM,  00457,  NONE, 1.1853, 1.2349, 15, 16330
 greg Gregor_1989_USGS, 2017-03-27,  ELP ,  USGS ,  JAVAD TRE_G3TH,  00588,  SIGMA3.5.14,  JAVRINGANT_DM,  00457,  NONE, 0.7102, 0.7688, 15, 163215