benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 l229 L_229_1935_USC&GS, 1992-06-11,  MHM ,  USGS ,  ASHTECH,  2105 ,  LM-XII3 6GP4,  ASH700228A,  1675,  NONE, 1.4945, 1.5411, 3, 44520
 l229 L_229_1935_USC&GS, 1994-09-16,  KWC ,  USGS ,  ASHTECH,  764 ,  LM-XII3 7A,  ASH700228A,  0598,  NONE, 1.4292, 1.4763, 30, 16590
 l229 L_229_1935_USC&GS, 2001-07-14,  CHS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.3722, 1.4198, 30, 16530
 l229 L_229_1935_USC&GS, 2001-07-15,  GDH ,   ,  ASHTECH,  O4582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.2156, 1.2648, 30, 155930