benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 a117, 2003-09-11,  WRT ,  USGS ,  ASHTECH,  04582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.3713, 1.4189, 30, 173630
 a117, 2003-09-16,  WRT ,  USGS ,  ASHTECH,  04582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.3672, 1.4149, 30, 16830
 a117 A117_1958_USC&GS, 2007-09-20,  WRT ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.3077, 1.3559, 30, 16270
 a117 A117_1958_USC&GS, 2007-09-25,  WRT ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.1104, 1.1609, 30, 171530
 a117 A117_1958_USC&GS, 2012-09-16,  WRT ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945B_M,  CR619992801,  NONE, 1.46, 1.5069, 15, 17415
 a117 A117_1958_USC&GS, 2012-09-20,  SAH ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945B_M,  CR519993703,  NONE, 1.2197, 1.2688, 15, 15345
 a117 A117_1958_USC&GS, 2015-09-19,  SAH ,  USGS ,  ASHTECH,  ZE1200411029 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 1.2885, 1.3369, 15, 152115