benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 elkf, 2001-09-18,  CWW ,   ,  ASHTECH,  02270 ,  Z-XII3 CC00,  ASH701945B_M,  CR519992603,  NONE, 1.1052, 1.1558, 30, 16340
 elkf, 2001-09-24,  CWW ,   ,  ASHTECH,  02270 ,  Z-XII3 CC00,  ASH701945B_M,  CR519992603,  NONE, 1.2014, 1.2507, 30, 152230
 elkf Elkf_USGS, 2006-09-18,  WRT ,  USGS ,  ASHTECH,  04582 ,  Z-XII3 CD00,  ASH700936D_M,  CR14333,  NONE, 1.2147, 1.2639, 30, 0
 elkf Elkf_USGS, 2010-09-30,  WRT ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.5099, 0.5768, 15, 1415