benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 alde alder_ncer_1989, 1993-08-19,  GDH ,  USGS ,  ASHTECH LM-XII3,  764,  7A26,  ASH700228A,  0598,  NONE, 1.3267, 1.3748, 30, 204430
 alde alder_ncer_1989, 1994-08-23,  CHS ,  USGS ,  ASHTECH LM-XII3,  764,  7A,  ASH700228A,  0598,  NONE, 1.198, 1.2474, 30, 300
 alde alder_ncer_1989, 1994-08-24,  CHS ,  USGS ,  ASHTECH LM-XII3,  764,  7A,  ASH700228A,  0598,  NONE, 1.198, 1.2474, 30, 300
 alde alder_ncer_1989, 1994-09-14,  CHS ,  USGS ,  ASHTECH LM-XII3,  763,  7A,  ASH700228A,  0718,  NONE, 1.193, 1.2424, 30, 0
 alde alder_ncer_1989, 1994-09-15,  CHS ,  USGS ,  ASHTECH LM-XII3,  763,  7A,  ASH700228A,  0718,  NONE, 1.193, 1.2424, 30, 0
 alde alder_ncer_1989, 1994-09-16,  CHS ,  USGS ,  ASHTECH LM-XII3,  763,  7A,  ASH700228A,  0718,  NONE, 1.193, 1.2424, 30, 0
 alde alder_ncer_1989, 1994-09-18,  CHS ,  USGS ,  ASHTECH LM-XII3,  762,  7A,  ASH700228A,  0745,  NONE, 1.193, 1.2424, 30, 59
 alde alder_ncer_1989, 2001-07-12,  GDH ,   ,  ASHTECH Z-XII3,  LP03360,  CC00,  ASH700936D_M,  CR14244,  NONE, 1.1498, 1.1998, 30, 19930
 alde alder_ncer_1989, 1992-05-06,  TNP ,  USGS ,  ASHTECH,  764 ,  LM-XII3 6A,  ASH700228A,  0598,  NONE, 1.1452, 1.1952, 30, 220
 alde alder_ncer_1989, 1992-05-09,  KWC ,  USGS ,  ASHTECH,  0831 ,  LM-XII3 5F,  ASH700228A,  0616,  NONE, 1.2684, 1.317, 30, 1320
 alde alder_ncer_1989, 1992-06-13,  WKG ,  USGS ,  ASHTECH,  0831 ,  LM-XII3 7A24,  ASH700228A,  0616,  NONE, 1.1788, 1.2284, 30, 1130
 alde alder_ncer_1989, 1994-09-17,  CHS ,  USGS ,  ASHTECH,  762 ,  LM-XII3 7A,  ASH700228A,  0745,  NONE, 1.193, 1.2424, 30, 3730
 alde alder_ncer_1989, 2001-07-13,  GDH ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14244,  NONE, 1.1498, 1.1998, 30, 10
 alde alder_ncer_1989, 2001-07-14,  GDH ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14244,  NONE, 1.1498, 1.1998, 30, 10
 alde alder_ncer_1989, 2004-07-16,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2683, 1.3169, 30, 17280
 alde alder_ncer_1989, 2004-07-17,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2683, 1.3169, 30, 30
 alde alder_ncer_1989, 2004-07-18,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2683, 1.3169, 30, 30
 alde alder_ncer_1989, 2004-07-19,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2683, 1.3169, 30, 30