benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 wall, 2000-07-05,  TAB ,  USC ,  ASHTECH Z-XII3,  188,  CD00,  ASH700936E_C,  376,  NONE, 0.8668, 0.9214, 30, 16140
 wall, 2000-07-06,  TAB ,  USC ,  ASHTECH Z-XII3,  188,  CD00,  ASH700936E_C,  376,  NONE, 0.8668, 0.9214, 30, 30
 wall, 2001-08-03,  AWL ,  USC ,  ASHTECH Z-XII3,  312,  CC00,  ASH700936D_M,  12738,  NONE, 0.5403, 0.6056, 30, 30
 wall, 2010-07-13,  JMS ,  USGS ,  TRIMBLE,  0220320174 ,  5700 NP,  TRM41249.00,  12561609,  NONE, 0.4967, 0.5671, 15, 40
 wall, 2010-07-14,  JMS ,  USGS ,  TRIMBLE,  0220320174 ,  5700 NP,  TRM41249.00,  12561609,  NONE, 0.4967, 0.5671, 15, 30