benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 20ft, 2000-09-14,  WRT ,   ,  ASHTECH,  lp019992805 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.4186, 1.4658, 30, 1680
 20ft, 2000-09-21,  WRT ,  USGS ,  ASHTECH,  lp019992805 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.4276, 1.4747, 30, 16730
 20ft, 2004-09-15,  WCH ,  USGS ,  ASHTECH,  04597 ,  Z-XII3 CD00,  ASH700936D_M,  CR14333,  NONE, 1.6071, 1.6529, 30, 15420
 20ft, 2004-09-27,  WCH ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.5698, 1.6159, 30, 15310
 20ft STA_02_FT_1995_CalTr, 2009-09-13,  SRW ,  USGS ,  ASHTECH,  04579 ,  Z-XII 1L001,  ASH701945B_M,  CR519993706,  NONE, 1.4902, 1.5369, 30, 16230
 20ft STA_02_FT_1995_CalTr, 2009-09-23,  WRT ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 1.4681, 1.5149, 30, 1650