anchor.diff:  Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69696,4.85,2015-09-06T16:25:01Z,2016-05-10T18:10:54Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69696,5.10,2016-05-10T18:10:55Z,2016-09-17T17:53:12Z,enable QZSS BeiDou Galileo
   Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69696,5.14,2016-09-17T17:53:13Z,2016-12-20T20:04:02Z,
  -Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69696,5.15,2016-12-20T20:04:03Z,9999-01-01T00:00:00Z,
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69696,5.15,2016-12-20T20:04:03Z,2018-01-10T04:29:58Z,
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69696,5.22,2018-01-10T04:29:59Z,9999-01-01T00:00:00Z,enable GPS-L5
   Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69697,4.17A,2010-09-19T00:00:00Z,2015-07-28T17:21:40Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69697,4.85,2015-07-28T17:21:41Z,2016-05-17T19:18:48Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69697,5.10,2016-05-17T19:18:49Z,2016-09-17T20:23:18Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69697,5.14,2016-09-17T20:23:19Z,2016-12-20T22:53:46Z,
  -Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69697,5.15,2016-12-20T22:53:47Z,9999-01-01T00:00:00Z,
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69697,5.15,2016-12-20T22:53:47Z,2018-01-10T08:59:43Z,
  +Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69697,5.22,2018-01-10T08:59:44Z,9999-01-01T00:00:00Z,enable GPS-L5
   Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69700,4.17A,2010-09-19T00:00:00Z,2015-12-10T23:00:58Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69700,5.10,2015-12-10T23:00:59Z,2016-08-15T05:47:22Z,
   Trimble Navigation Ltd.,TRIMBLE NETR9,5034K69700,5.14,2016-08-15T05:47:23Z,2016-12-20T03:13:27Z,
  
positive.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50023,4.93,2015-07-23T12:00:00Z,2016-01-10T21:00:44Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50023,5.10,2016-01-10T21:00:45Z,2016-09-17T20:35:25Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50023,5.14,2016-09-17T20:35:26Z,2016-12-20T23:11:48Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50023,5.15,2016-12-20T23:11:49Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50025,4.93,2015-07-23T00:00:00Z,2016-02-29T23:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50025,4.85,2016-02-29T23:00:01Z,2016-03-02T23:12:01Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5505R50025,5.10,2016-03-02T23:12:02Z,2016-10-14T00:37:07Z,
  
negative.code: Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72153,4.85,2015-08-18T17:25:01Z,2016-06-27T17:14:09Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72153,5.10,2016-06-27T17:14:10Z,2016-09-19T09:11:00Z,enable QZSS BeiDou Galileo
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72153,5.14,2016-09-19T09:11:01Z,2016-12-20T08:01:35Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72153,5.15,2016-12-20T08:01:36Z,2018-01-10T09:25:57Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72153,5.22,2018-01-10T09:25:58Z,9999-01-01T00:00:00Z,enable GPS-L5
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72167,4.17,2011-03-30T00:00:00Z,9999-01-01T00:00:00Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72187,4.17,2011-01-14T00:00:00Z,2016-04-21T22:05:06Z,
  Trimble Navigation Ltd.,TRIMBLE NETR9,5049K72187,5.10,2016-04-21T22:05:07Z,2016-08-21T03:09:11Z,
  