benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 nddd ND_1990_USGS, 1992-03-17,  WKG ,  USGS ,  ASHTECH,  762 ,  LM-XII3 6A,  ASH700228A,  0745,  NONE, 1.2131, 1.2623, 30, 45930
 nddd ND_1990_USGS, 1993-02-02,  WKG ,  USGS ,  ASHTECH,  764 ,  LM-XII3 6M24,  ASH700228A,  0598,  NONE, 1.2312, 1.2802, 30, 104030
 nddd ND_1990_USGS, 1993-10-26,  JMS ,  USGS ,  ASHTECH,  765 ,  LM-XII3 7A26,  ASH700228D,  1058,  NONE, 1.2875, 1.336, 30, 163330
 nddd ND_1990_USGS, 1993-11-03,  JMS ,  USGS ,  ASHTECH,  104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.2242, 1.2733, 30, 16530
 nddd ND_1990_USGS, 1993-11-23,  JMS ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 1.1618, 1.2116, 30, 182130
 nddd ND_1990_USGS, 1994-01-11,  KWC ,  USGS ,  ASHTECH,  763 ,  LM-XII3 7A,  ASH700228A,  0718,  NONE, 1.3016, 1.3499, 30, 182630
 nddd ND_1990_USGS, 1994-05-05,  JLS ,  USGS ,  ASHTECH,  104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.1577, 1.2076, 30, 14130
 nddd ND_1990_USGS, 1995-08-29,  GDH ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E00,  ASH700228A,  0598,  NONE, 1.1376, 1.1877, 30, 173830
 nddd ND_1990_USGS, 1996-06-12,  GDH ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1F00,  ASH700228A,  0598,  NONE, 1.2252, 1.2743, 30, 161030
 nddd ND_1990_USGS, 1997-09-22,  GDH ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 1E95,  ASH700936D_M,  CR14330,  NONE, 1.1295, 1.1797, 30, 165830
 nddd ND_1990_USGS, 1997-09-23,  GDH ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 1E95,  ASH700936D_M,  CR14330,  NONE, 1.1559, 1.2058, 30, 15570
 nddd ND_1990_USGS, 1999-03-08,  GDH ,  USGS ,  ASHTECH,  O4591 ,  Z-XII3 CB00,  ASH700936D_M,  CR14244,  NONE, 1.1457, 1.1957, 30, 17730
 nddd ND_1990_USGS, 1999-03-09,  GDH ,  USGS ,  ASHTECH,  O4591 ,  Z-XII3 CB00,  ASH700936D_M,  CR14244,  NONE, 1.1498, 1.1998, 30, 163530
 nddd ND_1990_USGS, 2001-04-03,  GDH ,   ,  ASHTECH,  lp019992805 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.1771, 1.2267, 30, 154330
 nddd ND_1990_USGS, 2001-04-09,  GDH ,   ,  ASHTECH,  4600 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.2257, 1.2748, 30, 162130
 nddd ND_1990_USGS, 2005-03-28,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 0.8714, 0.9259, 30, 17380
 nddd ND_1990_USGS, 2005-03-29,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 0.8714, 0.9259, 30, 0
 nddd ND_1990_USGS, 2013-01-07,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.6875, 0.7469, 15, 213245
 nddd ND_1990_USGS, 2013-01-08,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.6875, 0.7469, 15, 0
 nddd ND_1990_USGS, 2013-01-09,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.6875, 0.7469, 15, 0
 nddd ND_1990_USGS, 2013-01-10,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.6875, 0.7469, 15, 0
 nddd ND_1990_USGS, 2019-02-11,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.6.9,  JAVRINGANT_DM,  00488,  NONE, 0.8151, 0.8709, 15, 21100
 nddd ND_1990_USGS, 2019-02-12,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.6.9,  JAVRINGANT_DM,  00488,  NONE, 0.8151, 0.8709, 15, 0
 nddd ND_1990_USGS, 2019-02-13,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.6.9,  JAVRINGANT_DM,  00488,  NONE, 0.8151, 0.8709, 15, 0
 nddd ND_1990_USGS, 2019-02-14,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.6.9,  JAVRINGANT_DM,  00488,  NONE, 0.8151, 0.8709, 15, 0