benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 snre, 1994-08-11,  DDZ ,  USGS/CVO ,  ASHTECH LM-XII3,  008,  7A,  ASH700228D,  008,  NONE, 1.204, 1.2533, 15, 123615
 snre, 1994-08-12,  DDZ ,  USGS/CVO ,  ASHTECH LM-XII3,  008,  7A,  ASH700228D,  008,  NONE, 1.2412, 1.2901, 15, 122445
 snre, 1994-09-13,   ,   ,  TRIMBLE 4000SSE,  3589,  5.66,  TRM14532.00,  68233,  NONE, 1.3166, 0, 15, 23445
 snre, 2008-09-08,  STubman ,  USGS/Cascades Volcan,  TRIMBLE 4700,  220211182,  NP,  ASH700936E_C,  CR16291,  NONE, 1.1136, 1.164, 30, 19220
 snre, 2008-09-09,  STubman ,  USGS/Cascades Volcan,  TRIMBLE 4700,  220211182,  NP,  ASH700936E_C,  CR16291,  NONE, 1.1136, 1.164, 30, 30
 snre, 2016-08-12,  MEYERS ,  USGS/Cascades Volcan,  JAVAD TRE_G3TH,  00594,  SIGMA3.6.6,  TRM41249.00,  60121200,  NONE, 0.5626, 0.6302, 15, 3015