benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 ltlx, 2004-07-15,  ML ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220315215,  NP,  TRM41249.00,  12532395,  NONE, 0.553, 0.621, 30, 155330
 ltlx, 2004-07-16,  ML ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220315215,  NP,  TRM41249.00,  12532395,  NONE, 0.553, 0.621, 30, 30
 ltlx, 2012-07-21,  M. Davidson B. Pauk,  USGS/Cascades Volcan,  TRIMBLE,  0220292018 ,  5700 1.20,  TRM41249.00,  60054886,  NONE, 0.5842, 0.6511, 15, 30
 ltlx, 2012-07-22,  M. Davidson B. Pauk,  USGS/Cascades Volcan,  TRIMBLE,  0220292018 ,  5700 1.20,  TRM41249.00,  60054886,  NONE, 0.5842, 0.6511, 15, 30
 ltlx, 2018-07-27,  E. Montgomery-Brown ,  USGS/CalVO ,  JAVAD,  00334 ,  TRE_G3TH SIGMA3.6.1,  TRM41249.00,  60125132,  NONE, 0.4375, 0.5109, 15, 181245
 ltlx, 2018-07-28,  E. Montgomery-Brown ,  USGS/CalVO ,  JAVAD,  00334 ,  TRE_G3TH SIGMA3.6.1,  TRM41249.00,  60125132,  NONE, 0.4375, 0.5109, 15, 0
 ltlx, 2018-07-29,  E. Montgomery-Brown ,  USGS/CalVO ,  JAVAD,  00334 ,  TRE_G3TH SIGMA3.6.1,  TRM41249.00,  60125132,  NONE, 0.4375, 0.5109, 15, 0