benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s) grat Grate_1985_USGS, 1998-07-24, JMS , USGS , ASHTECH Z-XII3, O4579, 1E95, ASH700936D_M, CR14329, NONE, 1.2884, 1.3368, 30, 15310 grat Grate_1985_USGS, 1999-07-24, GDH , , ASHTECH Z-XII3, 203, 1F50, ASH700936E_C, CR16381, NONE, 1.2055, 1.2548, 30, 15560 grat Grate_1985_USGS, 1999-07-25, GDH , , ASHTECH Z-XII3, 203, 1F50, ASH700936E_C, CR16379, NONE, 1.1133, 1.1637, 30, 15360 grat Grate_1985_USGS, 2002-07-10, GDH , USGS , ASHTECH Z-XII3, LP03360, CC00, ASH700936D_M, CR14330, NONE, 1.2147, 1.2639, 30, 153930 grat Grate_1985_USGS, 2002-07-11, CHS , USGS , ASHTECH Z-XII3, LP019992804, CD00, ASH700936D_M, CR14333, NONE, 1.2622, 1.3109, 30, 15340 grat Grate_1985_USGS, 2005-07-20, GDH , USGS , ASHTECH Z-XII3, 579, CD00, ASH701945B_M, CR519993706, NONE, 1.1803, 1.2299, 30, 15540 grat Grate_1985_USGS, 2005-09-27, JLS , USGS , ASHTECH Z-X, ZE1200331018, ZE21, ASH701945B_M, CR619992805, NONE, 1.1864, 1.236, 30, 162130 grat Grate_1985_USGS, 2007-07-23, GDH , USGS , ASHTECH Z-X, ZE120023204, ZE21, ASH700936D_M, CR14244, NONE, 1.2288, 1.2778, 30, 172730 grat Grate_1985_USGS, 2007-07-24, GDH , USGS , ASHTECH Z-X, ZE120023204, ZE21, ASH700936D_M, CR14244, NONE, 0.4492, 0.5199, 30, 173430 grat Grate_1985_USGS, 2009-07-15, JLS , USGS , ASHTECH Z-XII, LP020000801, 1L001D04, ASH701945B_M, CR619992801, NONE, 1.1965, 1.2459, 30, 143930 grat Grate_1985_USGS, 2009-07-16, JMS , USGS , ASHTECH Z-XII, 579, 1L001D04, ASH700936D_M, CR14330, NONE, 1.3046, 1.3529, 30, 153530 grat Grate_1985_USGS, 2011-08-14, JLS , USGS , ASHTECH Z-X, ZE120023204, ZE210A13, ASH700936D_M, CR14330, NONE, 1.1813, 1.2309, 15, 141215 grat Grate_1985_USGS, 2011-08-15, CHS , USGS , ASHTECH Z-XII, LP019992804, 1L001D04, ASH700936D_M, CR14341, NONE, 1.2481, 1.2969, 15, 153315