benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 bgcr, 1999-09-09,  JTB ,  USGS ,  ASHTECH,  203 ,  Z-XII3 CD00,  ASH700936E_C,  CR16374,  NONE, 1.2692, 1.3178, 30, 15410
 bgcr, 1999-09-25,  JTB ,  USGS ,  ASHTECH,  203 ,  Z-XII3 CD00,  ASH700936E_C,  CR16374,  NONE, 1.5184, 1.5648, 30, 15510
 bgcr BGCR_stmpd_N430_1984, 2003-06-25,  FFP ,  USGS ,  ASHTECH,  04600 ,  Z-XII3 CD00,  ASH700936D_M,  CR14244,  NONE, 1.1053, 1.1558, 30, 162830
 bgcr BGCR_N430_1984_NGS, 2008-09-27,  WRT ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 1.5164, 1.5629, 30, 153040