benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 caaa Ca_1990_USGS, 1992-03-17,  GDH ,  USGS ,  ASHTECH,  1104 ,  LM-XII3 6A,  ASH700228D,  1068,  NONE, 1.2483, 1.2971, 30, 3550
 caaa Ca_1990_USGS, 1994-01-11,  GDH ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 1.2383, 1.2872, 30, 17490
 caaa Ca_1990_USGS, 1994-05-06,  GDH ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 1.3438, 1.3917, 30, 13410
 caaa Ca_1990_USGS, 1995-08-30,  CHS ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 1E00,  ASH700228D,  1068,  NONE, 1.3378, 1.3857, 30, 155730
 caaa Ca_1990_USGS, 1996-06-17,  JMS ,  USGS ,  ASHTECH,  707 ,  Z-XII3 1F00,  ASH700718B,  11404,  NONE, 1.479, 1.5257, 30, 16220
 caaa Ca_1990_USGS, 1997-09-29,  CHS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936D_M,  CR14244,  NONE, 1.4529, 1.4998, 30, 154730
 caaa Ca_1990_USGS, 1997-10-01,  GDH ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 1E95,  ASH700936D_M,  CR14330,  NONE, 1.3469, 1.3948, 30, 16170
 caaa Ca_1990_USGS, 1999-03-15,  CHS ,  USGS ,  ASHTECH,  LP03450 ,  Z-XII3 CB00,  ASH700936D_M,  CR14341,  NONE, 1.3863, 1.4338, 30, 163030
 caaa Ca_1990_USGS, 1999-03-16,  CHS ,  USGS ,  ASHTECH,  LP03450 ,  Z-XII3 CB00,  ASH700936D_M,  CR14341,  NONE, 1.3772, 1.4248, 30, 162030
 caaa Ca_1990_USGS, 2001-04-09,  CHS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.3479, 1.3958, 30, 15330
 caaa Ca_1990_USGS, 2001-04-10,  CHS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.3671, 1.4148, 30, 151730
 caaa Ca_1990_USGS, 2005-03-23,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.2288, 1.2778, 30, 171330
 caaa Ca_1990_USGS, 2005-03-24,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.2268, 1.2759, 30, 16440