benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 n518, 2001-09-11,  CHS ,   ,  ASHTECH,  lp020000801 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.3701, 1.4178, 30, 151830
 n518, 2001-09-17,  APS ,   ,  ASHTECH,  04597 ,  Z-XII3 CC00,  ASH701945B_M,  CR519993706,  NONE, 1.2702, 1.3188, 30, 15500
 n518 N518_1959_USCGS, 2005-09-14,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14333,  NONE, 1.2359, 1.2849, 30, 174030
 n518 N518_1959_USCGS, 2005-09-19,  HRY ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945E_M,  CR520031622,  NONE, 1.2481, 1.2969, 30, 155630
 n518 N518_1959_USCGS, 2010-08-08,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.7051, 0.7639, 15, 16645
 n518 N518_1959_USCGS, 2010-08-09,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.704, 0.7628, 15, 154745