benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 ants, 2001-09-15,  JMS ,   ,  ASHTECH,  04582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992805,  NONE, 0.5434, 0.6086, 30, 153430
 ants, 2001-09-22,  CWW ,   ,  ASHTECH,  02275 ,  Z-XII3 CC00,  ASH701945B_M,  CR519992603,  NONE, 0.8118, 0.8676, 30, 151330
 ants Ants_USGS, 2005-09-19,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14333,  NONE, 0.5804, 0.6438, 30, 14330
 ants Ants_USGS, 2006-09-13,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR520031626,  NONE, 0.4717, 0.5409, 30, 181830
 ants Ants_USGS, 2006-09-14,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR520031626,  NONE, 0.4717, 0.5409, 30, 0
 ants Ants_USGS, 2010-09-26,  WRT ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 0.6782, 0.7379, 15, 0