benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 m753, 1999-09-15,  JMS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14244,  NONE, 1.3923, 1.4397, 30, 1640
 m753, 1999-09-24,  JMS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14330,  NONE, 1.476, 1.5228, 30, 16230
 m753 M753_1988_NGS, 2003-11-02,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE00,  ASH701945B_M,  CR619992801,  NONE, 1.3198, 1.3679, 30, 16540
 m753 M753_1988_NGS, 2003-11-03,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE00,  ASH701945B_M,  CR619992801,  NONE, 1.2854, 1.3339, 30, 17230
 m753 M753_1988_NGS, 2008-10-08,  BP ,  USGS/Cascades Volcan,  TRIMBLE,  0220263478 ,  5700 NP,  TRM41249.00,  12354066,  NONE, 1.2304, 1.286, 15, 2130