benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 j74x, 2000-09-17,  APS ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14330,  NONE, 1.1842, 1.2338, 30, 15390
 j74x, 2000-09-24,  APS ,   ,  ASHTECH,  174 ,  Z-XII3 CD00,  ASH700936D_M,  CR14330,  NONE, 1.1407, 1.1908, 30, 15510
 j74x, 2004-09-23,  WCH ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14333,  NONE, 1.2268, 1.2759, 30, 16300
 j74x, 2004-09-25,  WRT ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.1509, 1.2009, 30, 174730
 j74x J74_1934_USCGS, 2009-09-18,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 1.2379, 1.2868, 30, 15590
 j74x J74_1934_USCGS, 2009-09-19,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.1803, 1.2299, 30, 152530
 j74x J74_1934_USCGS, 2009-09-23,  SAH ,  USGS ,  ASHTECH,  LP020000801 ,  Z-XII 1L001,  ASH701945E_M,  CR520031622,  NONE, 1.1803, 1.2299, 30, 155930