benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 idt2, 2001-09-16,  SAH ,   ,  ASHTECH,  lp019992809 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.4095, 1.4568, 30, 16030
 idt2, 2001-09-24,  GB ,  USGS ,  TRIMBLE,  3608A14594 ,  4000SSI NP,  TRM29659.00,  0220073545,  NONE, 1.6759, 0, 0, 15510
 idt2 IDTD_2_GPS_1997_NGS_, 2005-09-18,  FFP ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH701945E_M,  CR520031626,  NONE, 1.1519, 1.2019, 30, 154230
 idt2 IDTD_2_GPS_1997_NGS_, 2006-09-20,  WRT ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14333,  NONE, 1.3652, 1.4129, 30, 155330