benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 pcrk 81.3_1981_USGS, 2000-08-05,  PWS ,  U So Cal / Ariz Stat,  ASHTECH Z-XII3,  278,  CD00,  ASH700936E_C,  374,  NONE, 0.5502, 0.615, 0, 30
 pcrk 81.3_1981_USGS, 2011-07-20,  H Bleick T Kent ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220292018,  1.20,  TRM41249.00,  60267811,  NONE, 0.557, 0.6249, 15, 30
 pcrk 81.3_1981_USGS, 2011-07-21,  H Bleick T Kent ,  USGS/Cascades Volcan,  TRIMBLE 5700,  0220292018,  1.20,  TRM41249.00,  60267811,  NONE, 0.557, 0.6249, 15, 30
 pcrk 81.3_1981_USGS, 2004-07-08,  SK and DW ,  USGS/Cascades Volcan,  TRIMBLE,  0220320135 ,  5700 NP,  TRM41249.00,  12560557,  NONE, 0.5811, 0.6481, 30, 182330
 pcrk 81.3_1981_USGS, 2004-07-09,  SK and DW ,  USGS/Cascades Volcan,  TRIMBLE,  0220320135 ,  5700 NP,  TRM41249.00,  12560557,  NONE, 0.5811, 0.6481, 30, 30
 pcrk 81.3_1981_USGS, 2004-07-10,  SK and DW ,  USGS/Cascades Volcan,  TRIMBLE,  0220320135 ,  5700 NP,  TRM41249.00,  12560557,  NONE, 0.5811, 0.6481, 30, 30