anchor.diff:  Trimble Navigation Ltd.,TRIMBLE NETR9,5048K72002,4.85,2015-08-20T15:25:01Z,2016-05-05T01:28:12Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5048K72002,5.10,2016-05-05T01:28:13Z,2016-09-17T19:15:00Z,enable QZSS BeiDou Galileo
   Trimble Navigation Ltd.,TRIMBLE NETR9,5048K72002,5.14,2016-09-17T19:15:01Z,2016-12-20T21:39:16Z,
  -Trimble Navigation Ltd.,TRIMBLE NETR9,5048K72002,5.15,2016-12-20T21:39:17Z,9999-01-01T00:00:00Z,
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5048K72002,5.15,2016-12-20T21:39:17Z,2018-01-10T06:16:18Z,
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5048K72002,5.22,2018-01-10T06:16:19Z,9999-01-01T00:00:00Z,enable GPS-L5
   Trimble Navigation Ltd.,TRIMBLE NETR9,5048K72026,4.17,2011-03-30T00:00:00Z,2015-12-10T22:00:09Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5048K72026,5.10,2015-12-10T22:00:10Z,2016-08-21T06:57:13Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5048K72026,5.14,2016-08-21T06:57:14Z,2016-12-20T15:56:16Z,
  
positive.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50162,5.22,2017-06-20T01:24:45Z,9999-01-01T00:00:00Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50168,4.93,2015-07-23T00:00:00Z,2016-12-08T04:39:46Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50168,5.14,2016-12-08T04:39:47Z,2016-12-20T19:44:38Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50168,5.15,2016-12-20T19:44:39Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50170,4.93,2015-07-23T00:00:00Z,2015-12-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50170,4.85,2015-12-01T00:00:01Z,2015-12-10T20:14:59Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50170,5.10,2015-12-10T20:15:00Z,2016-08-14T20:25:07Z,
  
negative.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69674,4.85,2015-08-20T16:25:01Z,2016-05-16T18:53:38Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69674,5.10,2016-05-16T18:53:39Z,2016-09-17T19:05:20Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69674,5.14,2016-09-17T19:05:21Z,2016-12-20T21:18:17Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69674,5.15,2016-12-20T21:18:18Z,2018-01-10T05:51:35Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69674,5.22,2018-01-10T05:51:36Z,9999-01-01T00:00:00Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69675,4.17A,2010-09-19T00:00:00Z,2015-08-02T17:25:53Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69675,4.85,2015-08-02T17:25:54Z,2016-05-16T18:08:34Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69675,5.10,2016-05-16T18:08:35Z,2016-09-17T18:32:15Z,
  