anchor.diff:  RTKC,10,-38.821238353,176.319892846,716,,WGS84,Unknown,2001-01-12T00:00:01Z,2001-06-26T15:50:00Z
   RTZ,10,-38.61544,176.980518,867,,WGS84,Internal GPS Clock,2011-05-05T00:05:00Z,9999-01-01T00:00:00Z
   RTZ,20,-38.61544,176.980518,867,,WGS84,Internal GPS Clock,2011-05-05T00:05:00Z,9999-01-01T00:00:00Z
  +RU001,01,-39.2835,175.5654,2529,,WGS84,External GPS Device,2018-05-03T03:50:00Z,9999-01-01T00:00:00Z
  +RU001,02,-39.2835,175.5654,2529,,WGS84,External GPS Device,2019-03-20T23:00:00Z,9999-01-01T00:00:00Z
   RUAE,10,-38.079027394,177.949715282,750,,WGS84,Unknown,1994-07-28T07:44:00Z,1994-12-13T16:23:00Z
   RUAS,20,-38.147636748,177.0083136,46,,WGS84,Internal GPS Clock,2001-12-04T23:00:00Z,2009-10-27T00:00:00Z
   RUGF,10,-44.7243441,167.6433874,1106,,NZGD2000,External GPS Device,2007-10-17T23:59:02Z,2007-11-27T22:00:00Z
  
positive.code: WI13,10,-37.52353,177.19058,17,,WGS84,External GPS Device,2011-06-13T00:00:02Z,2018-05-19T00:00:00Z
  WI14,10,-37.52216,177.18849,25,,WGS84,External GPS Device,2011-06-13T00:00:02Z,2011-11-23T00:00:00Z
  WI15,10,-37.52165,177.18668,33,,WGS84,External GPS Device,2011-06-13T00:00:02Z,2011-11-23T00:00:00Z
  WIAZ,10,-36.793,175.1339,255,,WGS84,Internal GPS Clock,2010-07-27T03:15:00Z,9999-01-01T00:00:00Z
  WICS,20,-39.035634969,177.414705559,10,,WGS84,Internal GPS Clock,2002-04-18T00:00:00Z,2006-02-21T10:00:00Z
  WIGC,20,-42.701186545,172.800302583,247,,WGS84,Internal GPS Clock,2004-11-27T00:00:00Z,9999-01-01T00:00:00Z
  
negative.code: TMVZ,10,-39.11561,175.704064,1200,,WGS84,External GPS Device,2013-05-14T00:03:10Z,9999-01-01T00:00:00Z
  TMVZ,30,-39.11561,175.704064,1200,,WGS84,External GPS Device,2013-05-14T03:00:00Z,9999-01-01T00:00:00Z
  TMWZ,10,-41.106596095,175.890468961,529,,WGS84,External GPS Device,2007-02-23T21:18:00Z,9999-01-01T00:00:00Z
  TO006,01,-39.10924496,175.66824184,1530,,WGS84,External GPS Device,2018-08-28T00:30:00Z,2019-03-31T20:30:00Z
  TO006,02,-39.10924496,175.66824184,1530,,WGS84,External GPS Device,2018-10-08T23:50:00Z,2019-03-31T20:30:00Z
  TO006,03,-39.10924496,175.66824184,1530,,WGS84,External GPS Device,2019-04-16T22:50:00Z,9999-01-01T00:00:00Z
  TO006,04,-39.10924496,175.66824184,1530,,WGS84,External GPS Device,2019-04-16T22:50:00Z,9999-01-01T00:00:00Z
  TO015,01,-39.106219222,175.669882497,1530,,WGS84,External GPS Device,2018-08-10T00:00:00Z,9999-01-01T00:00:00Z
  TOAE,10,-38.122027446,177.575510587,380,,WGS84,Unknown,1994-08-07T11:27:00Z,1994-12-17T20:44:00Z
  TOKS,20,-43.82243,172.78084,577,,WGS84,External GPS Device,2013-03-19T00:05:00Z,9999-01-01T00:00:00Z
  TON1,10,-39.1319,175.6153,1491,,NZGD2000,Internal GPS Clock,2012-07-20T21:45:00Z,2013-06-07T00:00:00Z
  