benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 61rb, 2000-11-15,  WRT ,   ,  ASHTECH,  O4591 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.2793, 1.3278, 30, 17030
 61rb, 2000-11-17,  WRT ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.2216, 1.2707, 30, 16590
 61rb, 2004-09-17,  WR6 ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.3188, 1.3669, 30, 16830
 61rb, 2004-09-22,  WCH ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2086, 1.2579, 30, 15580
 61rb 61_RBR_Elev.5146_FT_, 2009-09-15,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.5762, 0.6398, 30, 0
 61rb 61_RBR_Elev.5146_FT_, 2009-09-16,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.5762, 0.6398, 30, 0