benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 18eg 18EGE_1983_USGS, 2006-07-13,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.2804, 1.3289, 30, 15370
 18eg 18EGE_1983_USGS, 2006-07-14,  GDH ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 1.2319, 1.2809, 30, 16030