benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 redb 81.1_1981_USGS, 2000-08-04,  PWS ,  U So Cal / Ariz Stat,  ASHTECH Z-XII3,  175,  CD00,  ASH700936E_C,  376,  NONE, 0.491, 0.559, 0, 30
 redb 81.1_1981_USGS, 2004-07-08,  ST and CH ,  USGS/Cascades Volcan,  TRIMBLE,  0220320138 ,  5700 NP,  TRM41249.00,  12560472,  NONE, 0.6477, 0.7126, 30, 30
 redb 81.1_1981_USGS, 2004-07-09,  ST and CH ,  USGS/Cascades Volcan,  TRIMBLE,  0220320138 ,  5700 NP,  TRM41249.00,  12560472,  NONE, 0.6477, 0.7126, 30, 30
 redb 81.1_1981_USGS, 2011-07-25,  T. Kent ,  USGS/Cascades Volcan,  TRIMBLE,  0220316024 ,  5700 2.01,  TRM41249.00,  12560557,  NONE, 0.5693, 0.6367, 15, 30
 redb 81.1_1981_USGS, 2011-07-26,  T. Kent ,  USGS/Cascades Volcan,  TRIMBLE,  0220316024 ,  5700 2.01,  TRM41249.00,  12560557,  NONE, 0.5693, 0.6367, 15, 30