benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 rflk, 2008-09-07,  STubman ,  USGS/Cascades Volcan,  TRIMBLE 4700,  220211182,  NP,  ASH700936E_C,  CR16291,  NONE, 1.2483, 1.2971, 30, 171230
 rflk, 2008-09-10,  STubman ,  USGS/Cascades Volcan,  TRIMBLE 4700,  220211182,  NP,  ASH700936E_C,  CR16291,  NONE, 1.4097, 1.457, 30, 18030