benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 n994, 2018-09-11,  ELP ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.6.9,  JAVRINGANT_DM,  01592,  NONE, 0.7771, 0.8339, 15, 15145
 n994, 2018-09-12,  ELP ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.6.9,  JAVRINGANT_DM,  00585,  NONE, 0.7966, 0.8528, 15, 135830
 n994 N994_1965_USCGS, 2021-08-17,  ELP ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.7.6,  ASH701945B_M,  CR519993706,  NONE, 0.811, 0.8669, 15, 13470
 n994 N994_1965_USCGS, 2021-08-18,  ELP ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.7.6,  ASH701945B_M,  CR519993706,  NONE, 0.7895, 0.8459, 15, 131745