benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 srgs, 2001-09-14,  GB ,  USGS ,  TRIMBLE,  3608A14631 ,  4000SSI NP,  TRM29659.00,  0220073541,  NONE, 0.4549, 0, 0, 134030
 srgs, 2001-09-20,  WRT ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14330,  NONE, 1.5234, 1.5698, 30, 1640