anchor.diff:  DUND,GeoNet,GNS,TRIMBLE NETR9,GPS+GLO+GAL+BDS+QZSS,30s,0,linz,trimble_netr9 x4,2015-03-08T22:32:30Z,2019-10-01T00:07:13Z
   DUND,GeoNet,GNS,TRIMBLE ALLOY,GPS+GLO+GAL+BDS+QZSS,30s,0,linz,trimble_netr9 x4,2019-10-01T00:07:14Z,9999-01-01T00:00:00Z
   DUNT,P Denys,OUSD,LEICA CRS1000,GPS,30s,4,sagenz,leica_lb2 x6,1999-09-23T00:00:03Z,2007-06-06T00:00:00Z
  -DUNT,P Denys,OUSD,LEICA GRX1200GGPRO,GPS+GLO,30s,4,sagenz,leica_lb2 x6,2007-06-06T00:00:00Z,9999-01-01T00:00:00Z
  +DUNT,P Denys,OUSD,LEICA GRX1200GGPRO,GPS+GLO,30s,4,sagenz,leica_lb2 x6,2007-06-06T00:00:01Z,9999-01-01T00:00:00Z
   DURV,GeoNet,GNS,TRIMBLE NETRS,GPS,30s,4,geonet,trimble_5700 x4,2005-03-09T22:00:00Z,2018-02-22T23:09:01Z
   DURV,GeoNet,GNS,TRIMBLE NETR9,GPS+GLO,30s,0,geonet,trimble_netr9 x4,2018-02-22T23:09:02Z,9999-01-01T00:00:00Z
   FALE,Toelau Iulio,Samoa DLSE,ASHTECH Z-XII3,GPS,30s,4,swpacific,ashtech_r x6,1996-11-13T00:00:00Z,2010-10-21T22:13:00Z
  
positive.code: LOK1,GeoNet,GNS,TRIMBLE NETR9,GPS+GLO,30s,0,geonet,trimble_netr9 x4,2016-11-15T21:44:30Z,2017-11-01T21:07:01Z
  LOOK,GeoNet,GNS,TRIMBLE NETR9,GPS+GLO,30s,0,geonet,trimble_netr9 x4,2017-06-15T03:16:40Z,9999-01-01T00:00:00Z
  LRR1,GeoNet,GNS,TRIMBLE NETR9,GPS+GLO,30s,0,geonet,trimble_netr9 x4,2016-11-15T04:46:08Z,2017-05-22T00:14:00Z
  LYTT,P Denys,OUSD,LEICA CRS1000,GPS,30s,4,sagenz,leica_lb2 x6,1999-11-15T00:00:03Z,2003-11-24T00:00:00Z
  LYTT,P Denys,OUSD,LEICA RS500,GPS,30s,4,sagenz,leica_lb2 x6,2003-11-24T00:00:00Z,2007-09-26T00:00:00Z
  LYTT,P Denys,OUSD,LEICA GRX1200GGPRO,GPS+GLO,30s,4,sagenz,leica_lb2 x6,2007-09-26T00:00:01Z,9999-01-01T00:00:00Z
  MAHA,GeoNet,GNS,TRIMBLE NETRS,GPS,30s,4,geonet,trimble_5700 x4,2009-11-16T07:05:30Z,2016-07-18T02:55:01Z
  
negative.code: OROA,GeoNet,GNS,TRIMBLE NETR9,GPS+GLO,30s,0,geonet,trimble_netr9 x4,2015-12-10T23:00:59Z,9999-01-01T00:00:00Z
  OTAK,GeoNet,GNS,TRIMBLE NETRS,GPS,30s,4,geonet,trimble_5700 x4,2007-10-06T07:59:00Z,2015-12-15T00:53:27Z
  OTAK,GeoNet,GNS,TRIMBLE NETR9,GPS+GLO,30s,0,geonet,trimble_netr9 x4,2015-12-15T00:53:28Z,9999-01-01T00:00:00Z
  OUSD,P Denys,OUSD,TRIMBLE 4000SSE,GPS,30s,4,sagenz,trimble_r x21,1995-01-16T00:00:00Z,1999-08-08T23:59:59Z
  OUSD,P Denys,OUSD,TRIMBLE 4000SSI,GPS,30s,4,sagenz,trimble_r x21,1999-08-09T00:00:00Z,1999-08-13T00:00:00Z
  OUSD,P Denys,OUSD,TRIMBLE 4000SSE,GPS,30s,4,sagenz,trimble_r x21,1999-08-13T00:00:00Z,2005-11-17T00:00:00Z
  OUSD,P Denys,OUSD,TRIMBLE 4000SSI,GPS,30s,4,sagenz,trimble_r x21,2005-11-17T00:00:00Z,2006-01-31T00:00:00Z
  