benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 y090, 1999-09-17,  JMS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14244,  NONE, 1.3166, 1.3648, 30, 16410
 y090, 1999-09-26,  JMS ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14330,  NONE, 1.353, 1.4008, 30, 16100
 y090 Y90_1934_USC&GS, 2003-06-24,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH700936D_M,  CR14333,  NONE, 1.2521, 1.3009, 30, 1650
 y090 Y90_1934_USC&GS, 2003-06-25,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH700936D_M,  CR14333,  NONE, 1.2521, 1.3009, 30, 0
 y090 Y90_1934_USC&GS, 2003-06-26,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH700936D_M,  CR14333,  NONE, 1.2521, 1.3009, 30, 0
 y090 Y90_1934_USC&GS, 2008-10-23,  BP ,  USGS/Cascades Volcan,  TRIMBLE,  220211182 ,  4700 NP,  TRM41249.00,  60054886,  NONE, 1.0233, 1.0811, 30, 30
 y090 Y90_1934_USC&GS, 2014-09-17,  SAH ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.5216, 0.5879, 15, 182415
 y090 Y90_1934_USC&GS, 2014-09-18,  SAH ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.5216, 0.5879, 15, 0