benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 n735, 1999-09-14,  JMS ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 CC00,  ASH700936D_M,  CR14244,  NONE, 1.4831, 1.5298, 30, 162030
 n735, 1999-09-23,  JMS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14330,  NONE, 1.5163, 1.5628, 30, 161130
 n735 N735_1987_NGS, 2003-11-02,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH701945E_M,  CR620022601,  NONE, 1.5316, 1.578, 30, 161030
 n735 N735_1987_NGS, 2003-11-03,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH701945E_M,  CR620022601,  NONE, 1.5054, 1.5519, 30, 17140
 n735 N735_1987_NGS, 2008-10-27,  EYI ,  USGS/Cascades Volcan,  TRIMBLE,  220211182 ,  4700 NP,  TRM41249.00,  60054886,  NONE, 1.2627, 1.318, 30, 0