anchor.diff:  Trimble Navigation Ltd.,TRIMBLE NETR9,5444R50040,4.85,2015-09-17T17:25:01Z,2016-04-18T17:15:23Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5444R50040,5.10,2016-04-18T17:15:24Z,2016-09-19T09:01:30Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5444R50040,5.14,2016-09-19T09:01:31Z,2016-12-20T07:51:32Z,
  -Trimble Navigation Ltd.,TRIMBLE NETR9,5444R50040,5.15,2016-12-20T07:51:33Z,9999-01-01T00:00:00Z,
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5444R50040,5.15,2016-12-20T07:51:33Z,2017-12-19T20:52:06Z,
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5444R50040,5.22,2017-12-19T20:52:07Z,9999-01-01T00:00:00Z,enable GPS-L5
   Trimble Navigation Ltd.,TRIMBLE NETR9,5444R50049,4.81,2015-04-01T00:00:00Z,2015-07-29T01:00:00Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5444R50049,4.85,2015-07-29T01:00:01Z,2016-04-03T23:33:27Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5444R50049,5.10,2016-04-03T23:33:28Z,2016-08-20T23:13:37Z,
  
positive.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72269,4.85,2015-09-09T17:25:01Z,2016-06-27T17:53:27Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72269,5.10,2016-06-27T17:53:28Z,2016-09-19T08:55:30Z,enable QZSS BeiDou Galileo
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72269,5.14,2016-09-19T08:55:31Z,2016-12-20T07:45:55Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72269,5.15,2016-12-20T07:45:56Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72301,4.17,2011-03-30T00:00:00Z,2016-04-05T01:30:25Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72301,4.85,2016-04-05T01:30:26Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5116K75213,4.42,2011-07-27T00:00:00Z,2015-03-03T02:13:22Z,
  
negative.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5035K69859,4.85,2015-09-17T16:25:01Z,2016-06-27T17:26:32Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5035K69859,5.10,2016-06-27T17:26:33Z,2016-09-19T08:34:25Z,enable QZSS BeiDou Galileo
  Trimble Navigation Ltd.,TRIMBLE NETR9,5035K69859,5.14,2016-09-19T08:34:26Z,2016-12-20T07:39:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5035K69859,5.15,2016-12-20T07:39:01Z,2017-12-19T19:39:50Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5035K69859,5.22,2017-12-19T19:39:51Z,9999-01-01T00:00:00Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5035K69868,4.17,2011-01-14T00:00:00Z,2014-08-21T00:12:24Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5035K69868,4.81,2014-08-21T00:34:48Z,2015-09-06T17:25:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5035K69868,4.85,2015-09-06T17:25:01Z,2016-05-17T17:15:52Z,
  