benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 llvf, 2004-07-15,  DW ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220264600,  NP,  TRM41249.00,  12532257,  NONE, 0.4574, 0.5297, 30, 13730
 llvf, 2004-07-16,  MP ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220264600,  NP,  TRM41249.00,  12532257,  NONE, 0.4659, 0.5377, 30, 30
 llvf, 2012-07-22,  M. Davidson ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220315215,  2.01,  TRM41249.00,  60267811,  NONE, 0.6461, 0.711, 15, 4645
 llvf, 2012-07-23,  M. Davidson ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220315215,  2.01,  TRM41249.00,  60267811,  NONE, 0.6461, 0.711, 15, 30
 llvf, 2018-07-26,  R. Kramer ,  USGS/CalVO ,  JAVAD,  00336 ,  TRE_G3TH SIGMA3.6.3,  TRM57971.00,  1441009309,  NONE, 0.5292, 0.5981, 15, 18245
 llvf, 2018-07-27,  R. Kramer ,  USGS/CalVO ,  JAVAD,  00336 ,  TRE_G3TH SIGMA3.6.3,  TRM57971.00,  1441009309,  NONE, 0.5292, 0.5981, 15, 0
 llvf, 2018-07-28,  R. Kramer ,  USGS/CalVO ,  JAVAD,  00336 ,  TRE_G3TH SIGMA3.6.3,  TRM57971.00,  1441009309,  NONE, 0.5292, 0.5981, 15, 0