anchor.diff:  Trimble Navigation Ltd.,TRIMBLE NETR9,5249K54373,5.10,2016-05-06T03:00:27Z,2016-08-15T05:01:37Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5249K54373,5.14,2016-08-15T05:01:38Z,2016-12-19T20:31:02Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5249K54373,5.15,2016-12-19T20:31:03Z,2017-09-19T01:39:07Z,
  -Trimble Navigation Ltd.,TRIMBLE NETR9,5249K54373,5.22,2017-09-19T01:39:08Z,9999-01-01T00:00:00Z,enable GPS-L5
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5249K54373,5.22,2017-09-19T01:39:08Z,2020-09-29T06:07:41Z,enable GPS-L5
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5249K54373,5.45,2020-09-29T06:07:42Z,9999-01-01T00:00:00Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5301K56131,default,2013-05-15T00:00:00Z,2014-03-11T00:00:00Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5301K56131,4.62,2014-03-11T00:00:01Z,2016-04-27T22:21:49Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5301K56131,5.10,2016-04-27T22:21:50Z,2016-08-21T03:20:21Z,
  
positive.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50131,5.10,2016-03-03T02:05:29Z,2016-10-13T23:46:54Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50131,5.14,2016-10-13T23:46:55Z,2016-12-20T22:29:51Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50131,5.15,2016-12-20T22:29:52Z,2017-06-20T18:22:16Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50131,5.22,2017-06-20T18:22:17Z,9999-01-01T00:00:00Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5750R51867,5.22,2018-05-09T00:50:32Z,2020-09-15T04:05:25Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5750R51867,5.45,2020-09-15T04:05:26Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5750R51869,5.22,2018-06-07T03:21:20Z,2020-09-15T04:19:02Z,enable GPS-L5
  
negative.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50060,5.10,2015-12-07T23:32:02Z,2016-08-14T20:36:52Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50060,5.14,2016-08-14T20:36:53Z,2016-12-19T20:42:38Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50060,5.15,2016-12-19T20:42:39Z,2017-09-18T22:39:11Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50060,5.22,2017-09-18T22:39:12Z,2020-09-29T05:52:05Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50060,5.45,2020-09-29T05:52:06Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50061,4.93,2015-07-23T00:00:00Z,2016-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50061,5.10,2016-01-01T00:00:01Z,2016-08-15T05:12:16Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5522R50061,5.14,2016-08-15T05:12:17Z,2016-12-20T02:37:14Z,
  