anchor.diff:                  "observedPeriod": "PT0S",
                   "feelsLikeTemperatureInCelsius": 3.9,
                   "meteoGroupStationName": "Pleucadeuc",
  -                "airPressureInHpa": 1005.5,
  +                "airPressureInHectoPascal": 1005.5,
                   "stationTimeZoneName": "Europe/Prague",
                   "effectiveCloudCoverInOcta": 5,
                   "observedUntil": "2016-10-15T08:00:00Z",
  
positive.code: 
  Here are relationship between observation periods and fields appropriately:
  
  - **PT0S** - airTemperatureInCelsius, airTemperatureInFahrenheit, feelsLikeTemperatureInCelsius, feelsLikeTemperatureInFahrenheit, airPressureInHpa,
               windSpeedInMeterPerSecond, windSpeedInKilometerPerHour, windSpeedInMilePerHour, windSpeedInBeaufort, windSpeedInKnot, windDirectionInDegree,
               dewPointTemperatureInCelsius, dewPointTemperatureInFahrenheit, relativeHumidityInPercent100based, effectiveCloudCoverInOcta, visibilityInMeter,
               visibilityInKilometers, visibilityInNauticalMile, visibilityInStatuteMile, presentWeather, weatherSymbol
  
negative.code:                 "airTemperatureInFahrenheit": 36.68,
                  "feelsLikeTemperatureInCelsius": 3.1,
                  "feelsLikeTemperatureInFahrenheit": 37.58,
                  "airPressureInHectoPascal": 1005.5,
                  "windSpeedInMeterPerSecond": 0.5144445,
                  "windSpeedInKilometerPerHour": 1.852,
                  "windSpeedInMilePerHour": 1.1507794,
  