benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 7601 7601_USGS, 1993-07-13,  GAM ,  USGS ,  ASHTECH LM-XII3,  831,  7A26,  ASH700228A,  1027,  NONE, 0.7328, 0.7908, 30, 231130
 7601 7601_USGS, 1992-08-15,  JMS ,  USGS ,  ASHTECH,  763 ,  LM-XII3 7A,  ASH700228A,  0718,  NONE, 1.1618, 1.2116, 30, 18170
 7601 7601_USGS, 1994-07-29,  CHS ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 1.1789, 1.2285, 30, 13490