benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 llvc, 2004-07-15,  DZDEW ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220320135,  NP,  TRM41249.00,  12560557,  NONE, 0.5645, 0.6321, 30, 2110
 llvc, 2004-07-16,  DZDEW ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220320135,  NP,  TRM41249.00,  12560557,  NONE, 0.5593, 0.6271, 30, 30
 llvc, 2018-07-27,  E. Montgomery-Brown ,  USGS/CalVO ,  JAVAD TRE_G3TH,  00483,  SIGMA3.6.7,  TRM41249.00,  60180849,  NONE, 0.9056, 0.965, 15, 215115
 llvc, 2012-07-22,  M. Davidson B. Pauk,  USGS/Cascades Volcan,  TRIMBLE,  0220264600 ,  5700 1.20,  TRM41249.00,  N/A,  NONE, 0.6116, 0.6776, 15, 30
 llvc, 2012-07-23,  M. Davidson B. Pauk,  USGS/Cascades Volcan,  TRIMBLE,  0220264600 ,  5700 1.20,  TRM41249.00,  N/A,  NONE, 0.6116, 0.6776, 15, 30
 llvc, 2018-07-28,  E. Montgomery-Brown ,  USGS/CalVO ,  JAVAD,  00483 ,  TRE_G3TH SIGMA3.6.7,  TRM41249.00,  60180849,  NONE, 0.9056, 0.965, 15, 0
 llvc, 2018-07-29,  E. Montgomery-Brown ,  USGS/CalVO ,  JAVAD,  00483 ,  TRE_G3TH SIGMA3.6.7,  TRM41249.00,  60180849,  NONE, 0.9056, 0.965, 15, 0