benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 nicc NIC_1990_NCER, 1992-02-11,  CHS ,  USGS ,  ASHTECH,  762 ,  LM-XII3 6A,  ASH700228A,  0745,  NONE, 1.385, 1.4325, 30, 71130
 nicc NIC_1990_NCER, 1993-01-14,  KWC ,  USGS ,  ASHTECH,  763 ,  LM-XII3 6M24,  ASH700228A,  0718,  NONE, 1.2412, 1.2901, 30, 12030
 nicc NIC_1990_NCER, 1994-04-18,  JLS ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 1.1688, 1.2186, 30, 1430
 nicc NIC_1990_NCER, 1995-09-19,  GDH ,  USGS ,  ASHTECH,  707 ,  Z-XII3 1E24,  ASH700718B,  11404,  NONE, 1.2815, 1.33, 30, 16110
 nicc NIC_1990_NCER, 1996-10-29,  GDH ,  USGS ,  ASHTECH,  O4579 ,  Z-XII3 1G00,  ASH700228D,  1068,  NONE, 0.49, 0.5581, 30, 152030
 nicc NIC_1990_NCER, 1997-11-17,  JMS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936D_M,  CR14341,  NONE, 1.3116, 1.3598, 30, 17330
 nicc NIC_1990_NCER, 1997-12-01,  GDH ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 1E95,  ASH700936D_M,  CR14244,  NONE, 1.171, 1.2207, 30, 17160
 nicc NIC_1990_NCER, 1998-11-30,  GDH ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 CB00,  ASH700936E_C,  CR16376,  NONE, 1.1872, 1.2367, 30, 17560
 nicc NIC_1990_NCER, 1998-12-07,  JMS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CB00,  ASH700936D_M,  CR14244,  NONE, 1.3823, 1.4298, 30, 17340
 nicc NIC_1990_NCER, 2001-01-08,  GDH ,   ,  ASHTECH,  lp019992805 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.2075, 1.2568, 30, 173930
 nicc NIC_1990_NCER, 2001-01-09,  CHS ,   ,  ASHTECH,  801 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993705,  NONE, 1.3116, 1.3598, 30, 162730
 nicc NIC_1990_NCER, 2002-11-20,  GDH ,  USGS ,  ASHTECH,  04582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 0.5014, 0.5688, 30, 10
 nicc NIC_1990_NCER, 2002-11-21,  GDH ,  USGS ,  ASHTECH,  04582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 0.5014, 0.5688, 30, 10
 nicc NIC_1990_NCER, 2006-02-01,  GDH ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14333,  NONE, 0.4309, 0.5028, 30, 0
 nicc NIC_1990_NCER, 2006-02-02,  GDH ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14333,  NONE, 0.4309, 0.5028, 30, 0
 nicc NIC_1990_NCER, 2009-03-03,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 0.6118, 0.6739, 30, 17530
 nicc NIC_1990_NCER, 2009-03-04,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 0.6118, 0.6739, 30, 0
 nicc NIC_1990_NCER, 2009-03-05,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 0.6118, 0.6739, 30, 0
 nicc NIC_1990_NCER, 2015-01-14,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 0.7812, 0.8378, 15, 3245
 nicc NIC_1990_NCER, 2015-01-15,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 0.7812, 0.8378, 15, 0
 nicc NIC_1990_NCER, 2015-01-16,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 0.7812, 0.8378, 15, 0