benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 a250 A250_stmpd_U316_Rese, 1992-10-05,   ,   ,  TURBOROGUE,  115 ,   ,  AOAD/M_T,  115,  NONE, 0.658, 0, 30, 18300
 a250 A250_stmpd_U316_Rese, 1992-10-06,   ,   ,  TURBOROGUE,  115 ,   ,  AOAD/M_T,  115,  NONE, 0.8146, 0, 30, 15290
 a250, 1996-09-17,  T.S ,  USGS ,  ASHTECH,  347 ,  Z-XII3 1G00,  ASH700228A,  1026,  NONE, 1.1352, 1.1854, 30, 15190
 a250, 1996-09-18,  T.S ,  USGS ,  ASHTECH,  347 ,  Z-XII3 1G00,  ASH700228D,  *163,  NONE, 1.1489, 1.1989, 30, 15310
 a250, 1998-09-15,  JTB ,  USGS ,  ASHTECH,  188 ,  Z-XII3 CB00,  ASH700936D_M,  CR14333,  NONE, 1.2257, 1.2748, 30, 15150
 a250, 1998-09-16,  JTB ,  USGS ,  ASHTECH,  188 ,  Z-XII3 CB00,  ASH700936D_M,  CR14333,  NONE, 1.1265, 1.1768, 30, 152330
 a250, 2000-08-23,  GDH ,   ,  ASHTECH,  O4591 ,  Z-XII3 CD00,  ASH700936D_M,  CR14330,  NONE, 1.2843, 1.3328, 30, 17030
 a250 A250_stmpd_U316_Rese, 2002-09-09,  CWW ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 1.4177, 1.4649, 30, 154830
 a250 A250_stmpd_U316_Rese, 2002-09-19,  TJW ,  USGS MENLO PARK ,  TRIMBLE,  4005A27620 ,  4000SSI NP,  TRM22020.00+GP,  0220050367,  NONE, 1.1116, 0, 30, 16140