benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 henn Hen_1990_USGS, 1992-02-11,  GDH ,  USGS ,  ASHTECH,  765 ,  LM-XII3 6b,  ASH700228D,  1058,  NONE, 1.2593, 1.308, 30, 7430
 henn Hen_1990_USGS, 1993-01-14,  GDH ,  USGS ,  ASHTECH,  764 ,  LM-XII3 6M24,  ASH700228A,  0598,  NONE, 1.1909, 1.2404, 30, 122530
 henn Hen_1990_USGS, 1994-04-18,  KWC ,  USGS ,  ASHTECH,  762 ,  LM-XII3 7A,  ASH700228A,  0745,  NONE, 1.3318, 1.3798, 30, 13580
 henn Hen_1990_USGS, 1995-09-21,  GDH ,  USGS ,  ASHTECH,  707 ,  Z-XII3 1E24,  ASH700718B,  11404,  NONE, 1.2725, 1.3211, 30, 15590
 henn Hen_1990_USGS, 1996-10-29,  CHS ,  USGS ,  ASHTECH,  143 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.5102, 1.5567, 30, 164530
 henn Hen_1990_USGS, 1996-11-13,  GDH ,  USGS ,  ASHTECH,  *LP00141 ,  Z-XII3 1E95,  ASH700718B,  11416,  NONE, 1.243, 1.2919, 30, 163730