benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 valm, 1999-09-13,  GWB ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.2186, 1.2678, 30, 1650
 valm, 1999-09-22,  GWB ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.2621, 1.3108, 30, 15400
 valm Valm_stmpd_STA.OE129, 2003-06-24,  WCH ,  USGS ,  ASHTECH,  LP02232 ,  Z-XII3 6J00,  ASH701945E_M,  CR620022605,  NONE, 1.1752, 1.2249, 30, 162535
 valm Valm_STA.OE1290+31.7, 2008-09-13,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.3349, 1.3829, 30, 1550
 valm Valm_STA.OE1290+31.7, 2008-09-17,  JLS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.1833, 1.2329, 30, 141145