benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 isla ISLA_2005_USGS, 2007-06-14,  GDH ,  USGS ,  ASHTECH,  LP020000801 ,  Z-XII 1L00,  ASH700936D_M,  CR14244,  NONE, 0.8325, 0.8879, 30, 183230
 isla ISLA_2005_USGS, 2007-06-15,  GDH ,  USGS ,  ASHTECH,  LP020000801 ,  Z-XII 1L00,  ASH700936D_M,  CR14244,  NONE, 0.8325, 0.8879, 30, 30