anchor.diff:  Trimble Navigation Ltd.,TRIMBLE NETR9,5213K83653,5.10,2016-05-05T00:16:36Z,2016-11-01T00:00:00Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5213K83653,5.14,2016-11-01T00:00:01Z,2016-12-20T12:41:27Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5213K83653,5.15,2016-12-20T12:41:28Z,2017-06-20T14:08:39Z,
  -Trimble Navigation Ltd.,TRIMBLE NETR9,5213K83653,5.22,2017-06-20T14:08:40Z,9999-01-01T00:00:00Z,enable GPS-L5
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5213K83653,5.22,2017-06-20T14:08:40Z,2020-08-11T03:52:04Z,enable GPS-L5
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5213K83653,5.45,2020-08-11T03:52:05Z,9999-01-01T00:00:00Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5213K83722,4.43,2012-06-20T00:00:00Z,2016-04-22T02:28:33Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5213K83722,5.10,2016-04-22T02:28:34Z,2016-08-21T04:04:08Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5213K83722,5.14,2016-08-21T04:04:09Z,2016-12-20T14:51:05Z,
  
positive.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82240,5.10,2016-04-27T01:49:17Z,2016-08-14T19:30:19Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82240,5.14,2016-08-14T19:30:20Z,2016-12-20T00:15:02Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82240,5.15,2016-12-20T00:15:03Z,2018-03-13T20:05:25Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82240,5.22,2018-03-13T20:05:26Z,9999-01-01T00:00:00Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82248,4.43,2012-03-21T00:00:00Z,2012-04-03T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82248,4.46,2012-04-03T00:00:01Z,2015-09-03T21:35:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82248,4.85,2015-09-03T21:35:01Z,2016-06-29T22:57:57Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82248,5.10,2016-06-29T22:57:58Z,2016-09-19T08:09:36Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82248,5.14,2016-09-19T08:09:37Z,2016-12-20T22:16:13Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82248,5.15,2016-12-20T22:16:14Z,2018-01-10T06:55:21Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82248,5.22,2018-01-10T06:55:22Z,9999-01-01T00:00:00Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82280,4.43,2012-03-21T00:00:00Z,2012-03-22T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82280,4.46,2012-03-22T00:00:01Z,2015-08-31T20:30:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82280,4.85,2015-08-31T20:30:01Z,2016-04-22T02:24:23Z,
  
negative.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5119K75698,5.10,2016-05-05T22:46:55Z,2016-08-14T20:42:19Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5119K75698,5.14,2016-08-14T20:42:20Z,2016-12-20T01:11:33Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5119K75698,5.15,2016-12-20T01:11:34Z,2017-06-19T21:55:01Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5119K75698,5.22,2017-06-19T21:55:02Z,2020-08-11T01:40:09Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5119K75698,5.45,2020-08-11T01:40:10Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76074,4.42,2011-07-27T00:00:00Z,2014-01-08T23:59:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76074,4.46,2014-01-09T00:00:01Z,2016-04-27T21:29:58Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76074,5.10,2016-04-27T21:29:59Z,2016-08-16T05:22:52Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76074,5.14,2016-08-16T05:22:53Z,2016-12-20T13:02:38Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76074,5.15,2016-12-20T13:02:39Z,2017-06-20T14:26:55Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76074,5.22,2017-06-20T14:26:56Z,2020-08-11T02:17:34Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76074,5.45,2020-08-11T02:17:35Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76077,4.42,2011-07-27T00:00:00Z,2013-12-09T23:58:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76077,4.46,2013-12-09T23:59:00Z,2015-04-13T03:26:59Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76077,4.81,2015-04-13T03:27:00Z,2016-04-28T21:48:22Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76077,5.10,2016-04-28T21:48:23Z,2016-08-16T04:04:30Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76077,5.14,2016-08-16T04:04:31Z,2016-12-20T03:26:31Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76077,5.15,2016-12-20T03:26:32Z,2017-06-19T23:52:02Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76077,5.22,2017-06-19T23:52:03Z,2020-08-11T02:31:08Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5121K76077,5.45,2020-08-11T02:31:09Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5122K76160,4.42,2011-07-27T00:00:00Z,2015-11-16T19:56:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5122K76160,4.85,2015-11-16T19:56:01Z,2016-04-22T00:35:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5122K76160,5.10,2016-04-22T00:35:01Z,2016-08-16T05:48:09Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5122K76160,5.14,2016-08-16T05:48:10Z,2016-12-20T13:59:04Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5122K76160,5.15,2016-12-20T13:59:05Z,2017-06-20T15:21:31Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5122K76160,5.22,2017-06-20T15:21:32Z,2020-08-11T02:49:11Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5122K76160,5.45,2020-08-11T02:49:12Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5152K81077,4.46,2012-04-01T01:00:00Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5206K82071,4.43,2012-03-21T00:00:00Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5207K82212,4.43,2012-03-21T00:00:00Z,2012-03-22T00:00:00Z,
  