benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 hlr1 Haul_Rm1_NCER, 1997-07-29,  GDH ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936D_M,  CR14333,  NONE, 1.3671, 1.4148, 30, 163430
 hlr1 Haul_Rm1_NCER, 2005-01-26,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945E_M,  CR520031615,  NONE, 1.2197, 1.2688, 30, 17140
 hlr1 Haul_Rm1_NCER, 2005-01-27,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945E_M,  CR520031615,  NONE, 1.2197, 1.2688, 30, 0