benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 x123 X123_1932_USC&GS, 2006-07-07,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 0.4092, 0.4829, 30, 14540
 x123 X123_1932_USC&GS, 2006-07-08,  CHS ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 0.4781, 0.5469, 30, 14520