benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 f091, 1999-09-15,  CHS ,  USGS ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 1.2065, 1.2558, 30, 162230
 f091, 1999-09-25,  CHS ,  USGS ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 1.2419, 1.2908, 30, 15590
 f091 F91_1934_USC&GS, 2003-06-25,  CHS ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.2996, 1.3479, 30, 15330
 f091 F91_1934_USC&GS, 2003-06-26,  CHS ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.2258, 1.2749, 30, 151830
 f091 F91_1934_USC&GS, 2008-10-29,  ML ,  USGS/Cascades Volcan,  TRIMBLE,  220213985 ,  4700 NP,  TRM41249.00,  60059999,  NONE, 0.4736, 0.5451, 30, 14540
 f091 F91_1934_USC&GS, 2008-10-30,  ML ,  USGS/Cascades Volcan,  TRIMBLE,  220213985 ,  4700 NP,  TRM41249.00,  60059999,  NONE, 0.4736, 0.5451, 30, 30
 f091 F91_1934_USC&GS, 2014-09-15,  SAH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 1.2187, 1.2679, 15, 161545
 f091 F91_1934_USC&GS, 2014-10-28,  JLS ,  USGS ,  JAVAD,  00620 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14341,  NONE, 1.1955, 1.2449, 15, 15915