benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 mclr, 2008-09-10,  TSisson ,  USGS/Cascades Volcan,  TRIMBLE 4700,  220211200,  NP,  TRM41249.00,  60054886,  NONE, 0.5502, 0.6183, 30, 19220
 mclr, 2008-09-11,  TSisson ,  USGS/Cascades Volcan,  TRIMBLE 4700,  220211200,  NP,  TRM41249.00,  60054886,  NONE, 0.5502, 0.6183, 30, 30
 mclr, 2016-09-08,  KRAMER ,  USGS/Cascades Volcan,  JAVAD TRE_G3TH,  00334,  SIGMA3.6.6,  TRM41249.00,  60267811,  NONE, 0.7049, 0.7682, 15, 193915
 mclr, 2016-09-09,  KRAMER ,  USGS/Cascades Volcan,  JAVAD TRE_G3TH,  00334,  SIGMA3.6.6,  TRM41249.00,  60267811,  NONE, 0.7049, 0.7682, 15, 0