benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 1104 HPGN_CA_1104_1990_Cal, 1994-03-24,  E. DUVALL ,  NGS ,  TRIMBLE 4000,  1552,  SST,  TRM14532.00,  19,  NONE, 1.4918, 0, 30, 182030