benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 7cla 7_cladwp_stmpd_7_LA_D, 1993-07-13,  CHS ,  USGS ,  ASHTECH LM-XII3,  764,  7A26,  ASH700228A,  0598,  NONE, 1.202, 1.2513, 30, 225930
 7cla 7_cladwp_stmpd_7_LA_, 1992-08-15,  GDH ,  USGS ,  ASHTECH,  107 ,  LM-XII3 7A,  ASH700228D,  *031,  NONE, 1.1396, 1.1897, 30, 18490
 7cla 7_cladwp_stmpd_7_LA_, 1994-07-29,  CHS ,  USGS ,  ASHTECH,  764 ,  LM-XII3 7A,  ASH700228A,  0598,  NONE, 1.2564, 1.3052, 30, 145030