anchor.diff:                  "temperatureMinInKelvin": 285.94998,
                   "precipitationAmountInMillimeter": 0.1,
                   "precipitationAmountInInch": 0.004
  +              },
  +              {
  +                "meteoGroupStationId": "3007300",
  +                "meteoGroupStationName": "Germ",
  +                "stationLocation": [ 13.2323, 52.4593 ],
  +                "stationTimeZoneName": "Europe/Berlin",
  +                "observedFrom": "2016-10-15T04:00:00Z",
  +                "observedUntil": "2016-10-15T07:00:00Z",
  +                "observedPeriod": "PT3H",
  +                "precipitationAmountInMillimeter": 0,
  +                "precipitationAmountInInch": 0,
  +                "pressureTendencyDescription": "INCREASING_THEN_STEADY",
  +                "pressureTendencyCode": 1,
  +                "pressureChangeInHectoPascal": 2
                 },
                 {
                   "meteoGroupStationId": "3007300",
  
positive.code:                 "windGustInKnots": 1.8999995,
                  "pressureTendencyDescription": "STEADY",
                  "pressureTendencyCode": 4,
                  "precipitationAmountInMillimeter": 0.5,
                  "precipitationAmountInInch": 0.02,
                  "freshSnowfallInCentimeter": 1,
                  "freshSnowfallInInch": 0.394,
                  "pressureChangeInHectoPascal": 0
                },
                {
                  "meteoGroupStationId": "3007237",
                  "meteoGroupStationName": "Pleucadeuc",
                  "stationLocation": [ -2.2323, 47.4593 ],
                  "stationTimeZoneName": "Europe/Prague",
                  "observedFrom": "2016-10-15T06:00:00Z",
                  "observedUntil": "2016-10-15T09:00:00Z",
                  "observedPeriod": "PT3H",
                  "precipitationAmountInMillimeter": 1.3,
                  "precipitationAmountInInch": 0.051,
  
negative.code:                 "meteoGroupStationName": "Pleucadeuc",
                  "stationLocation": [ -2.2323, 47.4593 ],
                  "stationTimeZoneName": "Europe/Prague",
                  "observedFrom": "2016-10-13T22:00:00Z",
                  "observedUntil": "2016-10-14T22:00:00Z",
                  "observedPeriod": "PT24H",
                  "precipitationAmountInMillimeter": 6,
                  "precipitationAmountInInch": 0.236,
  