benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 02tb HPGN_02-TB_1998_CalT, 2005-06-22,  JMS ,  USGS ,  ASHTECH,  ZE120033802 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 1.4661, 1.513, 30, 16260
 02tb HPGN_02-TB_1998_CalT, 2005-06-27,  JMS ,  USGS ,  ASHTECH,  ZE120033802 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 1.3854, 1.4329, 30, 16280