benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 slas, 2004-07-12,  MP and BH ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220320135,  NP,  TRM41249.00,  12532257,  NONE, 0.5204, 0.5897, 30, 30
 slas, 2004-07-13,  MP and BH ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220320135,  NP,  TRM41249.00,  12532257,  NONE, 0.5204, 0.5897, 30, 30
 slas, 2006-07-28,  MLSD ,  USGS/Cascades Volcan,  TRIMBLE,  4526253186 ,  NETRS NP,  TRM41249.00,  12354183,  NONE, 0.593, 0.6596, 15, 17240
 slas, 2006-07-29,  MLSD ,  USGS/Cascades Volcan,  TRIMBLE,  4526253186 ,  NETRS NP,  TRM41249.00,  12354183,  NONE, 0.593, 0.6596, 15, 0
 slas, 2012-09-21,  R. Denlinger ,  USGS/Cascades Volcan,  TRIMBLE,  0220316024 ,  5700 2.01,  TRM41249.00,  60054886,  NONE, 0.6674, 0.7317, 15, 30
 slas, 2012-09-22,  R. Denlinger ,  USGS/Cascades Volcan,  TRIMBLE,  0220316024 ,  5700 2.01,  TRM41249.00,  60054886,  NONE, 0.6674, 0.7317, 15, 30