benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 punt Punter_1989_USGS, 1993-07-15,  GAM ,  USGS ,  ASHTECH LM-XII3,  104,  7A26,  ASH700228D,  1068,  NONE, 1.1698, 1.2195, 30, 232330
 punt Punter_1989_USGS, 1992-08-12,  BDK ,  USGS ,  ASHTECH,  762 ,  LM-XII3 7A,  ASH700228A,  0745,  NONE, 1.1346, 1.1848, 30, 185230
 punt Punter_1989_USGS, 1994-07-31,  BDK ,  USGS ,  ASHTECH,  99 ,  LM-XII3 7A,  ASH700228D,  1036,  NONE, 1.2237, 1.2728, 30, 14630
 punt Punter_1989_USGS, 1996-07-21,  CHS ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 1F00,  ASH700228D,  1036,  NONE, 1.2855, 1.334, 30, 16730