benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 r090, 1999-09-16,  CHS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 1.466, 1.5129, 30, 16350
 r090, 1999-09-26,  CHS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 1.4639, 1.5108, 30, 16630
 r090 R90_1934_USC&GS, 2003-06-25,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZC00,  ASH701945B_M,  CR519993703,  NONE, 1.3178, 1.3659, 30, 0
 r090 R90_1934_USC&GS, 2003-06-26,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZC00,  ASH701945B_M,  CR519993703,  NONE, 1.3178, 1.3659, 30, 0
 r090 R90_1934_USC&GS, 2008-10-23,  BP ,  USGS/Cascades Volcan,  TRIMBLE,  220213985 ,  4700 NP,  TRM41249.00,  60249097,  NONE, 1.0958, 1.1527, 30, 30
 r090 R90_1934_USC&GS, 2014-10-27,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.3511, 1.3989, 15, 18430
 r090 R90_1934_USC&GS, 2014-10-28,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.3511, 1.3989, 15, 0