benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 guan, 1999-09-18,  CWW ,   ,  ASHTECH,  174 ,  Z-XII3 CD00,  ASH700936E_C,  CR16376,  NONE, 1.358, 1.4058, 30, 155230
 guan, 1999-09-27,  JTB ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 CC00,  ASH701945B_M,  CR619992801,  NONE, 1.1498, 1.1998, 30, 16100
 guan Guan_USGS, 2003-06-20,  MCN ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 1.1874, 1.2369, 30, 161130
 guan Guan_USGS, 2003-06-27,  MCN ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 1.2299, 1.2789, 30, 16460
 guan Guan_USGS, 2008-09-22,  WRT ,  USGS ,  ASHTECH,  04582 ,  Z-XII3 1L00,  ASH701945E_M,  CR520031615,  NONE, 1.1691, 1.2188, 30, 17550
 guan Guan_USGS, 2008-09-24,  WRT ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 1.2349, 1.2839, 30, 163240
 guan Guan_USGS, 2013-09-16,  SAH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 1.159, 1.2089, 15, 161415