benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 tbpf, 2001-06-09,  SKW ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.6009, 1.6468, 30, 43530
 tbpf Table_Pkf_USGS, 2006-06-01,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.4096, 1.4569, 30, 17320
 tbpf Table_Pkf_USGS, 2006-06-02,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.4096, 1.4569, 30, 0
 tbpf Table_Pkf_USGS, 2006-06-03,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.4096, 1.4569, 30, 0
 tbpf Table_Pkf_USGS, 2006-06-04,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.4086, 1.4559, 30, 0