benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 warn, 1994-06-15,  IGNACIO JULIAN ,  CALIF DEPT TRANSPORT,  TRIMBLE 4000,  1528,  SSE,  TRM14532.00,  4279,  NONE, 1.6858, 0, 30, 1500
 warn, 1994-06-16,  L. CONNER ,  CALIF DEPT TRANSPORT,  TRIMBLE 4000,  4803,  SSE,  TRM14532.00,  6000,  NONE, 1.6868, 0, 30, 15030
 warn, 1999-07-16,  JBA ,  UNIV CALIF LOS ANGEL,  ASHTECH Z-XII3,  148,  1F50,  ASH700936A_M,  782,  NONE, 1.3745, 0, 30, 15470
 WARN WARNE_1992, 1994-10-14,   ,  USGS ,  TRIMBLE,  1504 ,  4000 SSE,  TRM22020.00+GP,  64297,  NONE, 1.4385, 0, 15, 135145
 WARN WARNE_1992, 1994-10-25,   ,   ,  TRIMBLE,  1504 ,  4000 SSE,  TRM22020.00+GP,  64297,  NONE, 1.531, 0, 15, 234315
 warn, 2010-03-02,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.462, 1.5089, 15, 155445
 warn, 2010-03-03,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.4651, 1.512, 15, 154145
 warn WARNE_1992_Caltrans, 2011-03-16,  DND ,  USGS ,  ASHTECH,  LP02652 ,  Z-XII CD001,  TRM41249.00,  60179404,  NONE, 1.4762, 1.53, 15, 16490
 warn WARNE_1992_Caltrans, 2011-03-17,  DND ,  USGS ,  ASHTECH,  LP03318 ,  Z-XII CC001,  TRM41249.00,  60179269,  NONE, 1.5326, 1.5861, 15, 16120