benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 camb, 2001-09-13,  WCH ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2318, 1.2808, 30, 16130
 camb Camb_USGS, 2005-09-16,  MAB ,  USGS ,  ASHTECH,  579 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.343, 1.3909, 30, 16230
 camb Camb_USGS, 2006-09-22,  SAH ,  USGS ,  ASHTECH,  LP020000801 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992805,  NONE, 1.2046, 1.2539, 30, 15460
 camb Camb_USGS, 2010-09-19,  JMS ,  USGS ,  TRIMBLE,  4927175164 ,  NETRS NP,  ASH701945B_M,  CR519993702,  NONE, 0.6834, 0.7428, 15, 17260
 camb Camb_USGS, 2010-09-20,  JMS ,  USGS ,  TRIMBLE,  4927175164 ,  NETRS NP,  ASH701945B_M,  CR519993702,  NONE, 0.6834, 0.7428, 15, 30
 camb Camb_USGS, 2010-09-21,  JMS ,  USGS ,  TRIMBLE,  4927175164 ,  NETRS NP,  ASH701945B_M,  CR519993702,  NONE, 0.6834, 0.7428, 15, 30