benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 d405, 2001-09-15,  SAH ,   ,  ASHTECH,  lp019992809 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.4347, 1.4818, 30, 1610
 d405, 2001-09-20,  TD ,  USGS ,  TRIMBLE,  3608A14632 ,  4000SSI NP,  TRM29659.00,  0220089288,  NONE, 1.4971, 0, 0, 152530
 d405 D405_1982_NGS, 2005-09-17,  FFP ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH701945E_M,  CR520031626,  NONE, 1.1479, 1.1979, 30, 15370
 d405 D405_1982_NGS, 2006-09-18,  CMH ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.3824, 1.43, 30, 15590