benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 thrn, 1999-09-17,  CHS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 0.5728, 0.6366, 30, 15290
 thrn, 1999-09-27,  CHS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 0.5697, 0.6336, 30, 152030
 thrn, 2008-10-22,  BP ,  USGS/Cascades Volcan,  TRIMBLE,  220211200 ,  4700 NP,  TRM41249.00,  60249097,  NONE, 0.5423, 0.6107, 30, 340
 thrn, 2008-10-23,  BP ,  USGS/Cascades Volcan,  TRIMBLE,  220211200 ,  4700 NP,  TRM41249.00,  60249097,  NONE, 0.5423, 0.6107, 30, 30
 thrn, 2008-10-24,  BP ,  USGS/Cascades Volcan,  TRIMBLE,  220211200 ,  4700 NP,  TRM41249.00,  60249097,  NONE, 0.5423, 0.6107, 30, 30
 thrn THRN_USGS, 2014-09-13,  SAH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.5511, 0.6159, 15, 162845
 thrn THRN_USGS, 2014-10-25,  JLS ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.3.1,  ASH701945B_M,  CR519993706,  NONE, 0.704, 0.7628, 15, 155545