benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 aval 81.6_1981_USGS, 2000-08-09,  MPP ,  U So Cal / Ariz Stat,  ASHTECH Z-XII3,  203,  CD00,  ASH700936E_C,  364,  NONE, 0.3544, 0.433, 0, 30
 aval 81.6_1981_USGS, 2004-07-09,  CH and BH ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220264600,  NP,  TRM41249.00,  12532257,  NONE, 0.5218, 0.591, 30, 30
 aval 81.6_1981_USGS, 2004-07-10,  CH and BH ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220264600,  NP,  TRM41249.00,  12532257,  NONE, 0.5218, 0.591, 30, 30
 aval 81.6_1981_USGS, 2000-08-08,  MPP ,  U So Cal / Ariz Stat,  ASHTECH,  203 ,  Z-XII3 CD00,  ASH700936E_C,  364,  NONE, 0.3544, 0.433, 0, 18500
 aval 81.6_1981_USGS, 2011-07-21,  M & K Lisowski ,  USGS/Cascades Volcan,  TRIMBLE,  0220264600 ,  5700 1.20,  TRM41249.00,  60267788,  NONE, 0.5158, 0.5853, 15, 183345
 aval 81.6_1981_USGS, 2011-07-22,  M & K Lisowski ,  USGS/Cascades Volcan,  TRIMBLE,  0220264600 ,  5700 1.20,  TRM41249.00,  60267788,  NONE, 0.5158, 0.5853, 15, 30
 aval 81.6_1981_USGS, 2011-07-23,  M & K Lisowski ,  USGS/Cascades Volcan,  TRIMBLE,  0220264600 ,  5700 1.20,  TRM41249.00,  60267788,  NONE, 0.5158, 0.5853, 15, 30