benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 shel Shelite_1953_USC&GS, 1994-07-10,  WKG ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 0.6836, 0.7431, 30, 17330
 shel Shelite_1953_USC&GS, 2000-08-16,  GDH ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 0.5308, 0.5966, 30, 10
 shel Shelite_1953_USC&GS, 2004-05-12,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE00,  ASH700936D_M,  CR14329,  NONE, 0.6065, 0.6688, 30, 0
 shel Shelite_1953_USC&GS, 2004-05-13,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE00,  ASH700936D_M,  CR14329,  NONE, 0.6065, 0.6688, 30, 0