anchor.diff:                  "meteoGroupStationName": "Pleucadeuc",
                   "stationLocation": [ -2.2323, 47.4593 ],
                   "stationTimeZoneName": "Europe/Prague",
  -                "observedFrom": "2016-10-14T00:00:00Z",
  -                "observedUntil": "2016-10-15T00:00:00Z",
  +                "observedFrom": "2016-10-13T22:00:00Z",
  +                "observedUntil": "2016-10-14T22:00:00Z",
                   "observedPeriod": "PT24H",
                   "precipitationAmountInMillimeter": 6,
                   "precipitationAmountInInch": 0.236,
  
positive.code:                 "temperatureMinInKelvin": 285.94998,
                  "precipitationAmountInMillimeter": 0.1,
                  "precipitationAmountInInch": 0.004
                },
                {
                  "meteoGroupStationId": "3007300",
  
negative.code:                 "meteoGroupStationName": "Germ",
                  "stationLocation": [ 13.2323, 52.4593 ],
                  "stationTimeZoneName": "Europe/Berlin",
                  "observedFrom": "2016-10-13T22:00:00Z",
                  "observedUntil": "2016-10-14T22:00:00Z",
                  "observedPeriod": "PT24H",
                  "precipitationAmountInMillimeter": 0.1,
                  "precipitationAmountInInch": 0.004,
  