benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 e818 E_818_1955_USC&GS, 1998-07-10,  unknown ,  CALIF DEPT TRANSPORT,  TRIMBLE 4000,  4883,  SSE,  TRM22020.00+GP,  76723,  NONE, 2, 0, 15, 151745
 e818 E_818_1955_USC&GS, 1998-07-13,  unknown ,  CALIF DEPT TRANSPORT,  TRIMBLE 4000,  4883,  SSE,  TRM22020.00+GP,  76723,  NONE, 2, 0, 15, 195545
 e818 E_818_1955_USC&GS, 1998-07-14,  unknown ,  CALIF DEPT TRANSPORT,  TRIMBLE 4000,  4883,  SSE,  TRM22020.00+GP,  723,  NONE, 2, 0, 15, 15345
 e818, 1999-05-05,   ,   ,  TRIMBLE 4000SSE,  7882,  7.25,  4000ST,  114383,  L1/L2, 2, 0, 30, 152730
 e818 E_818_1955_USC&GS, 2005-05-19,  JMS ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH700936D_M,  CR14333,  NONE, 1.339, 1.3869, 30, 16120
 e818 E_818_1955_USC&GS, 2005-05-25,  CHS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945E_M,  CR620022601,  NONE, 1.2551, 1.3039, 30, 153130