benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 wond Wonder_1953_USC&GS, 1994-07-08,  JLS ,  USGS ,  ASHTECH,  763 ,  LM-XII3 7A,  ASH700228A,  0718,  NONE, 0.5127, 0.5794, 30, 171030
 wond Wonder_1953_USC&GS, 2000-08-17,  JMS ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14244,  NONE, 0.534, 0.5996, 30, 164130
 wond Wonder_1953_USC&GS, 2000-08-18,  JMS ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14244,  NONE, 0.534, 0.5996, 30, 10
 wond Wonder_1953_USC&GS, 2004-05-18,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH701945E_M,  CR520031626,  NONE, 0.5194, 0.5858, 30, 0
 wond Wonder_1953_USC&GS, 2004-05-19,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH701945E_M,  CR520031626,  NONE, 0.5194, 0.5858, 30, 0
 wond Wonder_1953_USC&GS, 2004-05-20,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH701945E_M,  CR520031626,  NONE, 0.5194, 0.5858, 30, 0