benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s) nwsm, 2009-07-19, BH , WWU , TRIMBLE 5700, 0220240424, NP, TRM39105.00, 00000000, NONE, 0.506, 0, 15, 20490 nwsm, 2009-07-20, BH , WWU , TRIMBLE 5700, 0220240424, NP, TRM41249.00, 00000000, NONE, 0.506, 0.5759, 15, 0