benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 c753, 1999-09-14,  CHS ,  USGS ,  ASHTECH,  O4591 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992805,  NONE, 1.4246, 1.4718, 30, 16730
 c753, 1999-09-24,  CHS ,  USGS ,  ASHTECH,  O4591 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992805,  NONE, 1.5909, 1.6368, 30, 154030
 c753 C753_1988_NGS, 2003-11-02,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE00,  ASH701945E_M,  CR620022602,  NONE, 1.4257, 1.4729, 30, 164030
 c753 C753_1988_NGS, 2003-11-03,  CHS ,  USGS ,  ASHTECH,  LP020000801 ,  Z-XII3 CD00,  ASH701945E_M,  CR520031626,  NONE, 1.4943, 1.5409, 30, 165430
 c753 C753_1988_NGS, 2008-10-09,  BP ,  USGS/Cascades Volcan,  TRIMBLE,  0220263478 ,  5700 NP,  TRM41249.00,  60243776,  NONE, 1.2504, 1.3058, 15, 45