benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 01t4 01-T4_1995_CalTrans, 2005-06-23,  CHS ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.4146, 1.4619, 30, 154530
 01t4 01-T4_1995_CalTrans, 2005-06-25,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 1.4126, 1.4599, 30, 16930