benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s) KNCK, 2001-09-18, GB , USGS , TRIMBLE 4000SSI, 3608A14631, NP, TRM29659.00, 0220073540, NONE, 1.3159, 0, 0, 1620 knck, 2001-09-25, WCH , , ASHTECH Z-XII3, lp019992804, CD00, ASH700936D_M, CR14329, NONE, 1.0961, 1.1468, 30, 15560 knck Knck_USGS, 2006-09-14, CHS , USGS , ASHTECH Z-X, ZE1200331017, ZE21, ASH700936D_M, CR14244, NONE, 1.1843, 1.2338, 30, 154130 knck Knck_USGS, 2012-09-16, JMS , USGS , ASHTECH Z-X, ZE1200526028, ZE210A13, ASH701945E_M, CR520031622, NONE, 1.1448, 1.1949, 15, 172345 knck Knck_USGS, 2012-09-18, JMS , USGS , ASHTECH Z-X, ZE120023208, ZE210A13, ASH701945E_M, CR520031622, NONE, 1.3157, 1.3638, 15, 155415 knck Knck_USGS, 2016-09-01, WRT , USGS , JAVAD TRE_G3TH, 01337, SIGMA3.5.10, ASH700936D_M, CR14329, NONE, 1.1621, 1.2119, 15, 15280 knck Knck_USGS, 2016-09-04, WRT , USGS , JAVAD TRE_G3TH, 01337, SIGMA3.5.10, ASH700936D_M, CR14329, NONE, 1.2551, 1.3039, 15, 151930