benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 hamm Ham_1942_USC&GS, 2004-07-15,  JLS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE00,  ASH701945B_M,  CR519993706,  NONE, 0.5731, 0.6368, 30, 0
 hamm Ham_1942_USC&GS, 2004-07-16,  JLS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE00,  ASH701945B_M,  CR519993706,  NONE, 0.5731, 0.6368, 30, 0