benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 hilg, 2001-09-16,  CHS ,   ,  ASHTECH,  lp020000801 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.1123, 1.1627, 30, 154830
 hilg, 2001-09-25,  CWW ,   ,  ASHTECH,  02270 ,  Z-XII3 CC00,  ASH701945B_M,  CR519992603,  NONE, 0.8886, 0.9428, 30, 152330
 hilg Hilg_USGS_GPS-plug, 2006-09-14,  WRT ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945B_M,  CR519993703,  NONE, 1.1053, 1.1558, 30, 16930
 hilg Hilg_USGS_GPS-plug, 2010-09-13,  FFP ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.085, 1.1359, 15, 151145
 hilg Hilg_USGS_GPS-plug, 2010-10-01,  SAH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 1.2046, 1.2539, 15, 16045