anchor.diff:  			"validPeriod" : "PT0S"
   		}, {
   			"relativeGlobalRadiationInPercent" : 77,
  -			"precipitationProbabilityInPercent" : 7,
   			"locatedAt" : [-16.78, 32.69],
   			"validUntil" : "2016-12-13T12:00:00Z",
   			"validFrom" : "2016-12-13T11:00:00Z",
  
positive.code: 			"validPeriod" : "PT0S"
  		}, {
  			"relativeGlobalRadiationInPercent" : 82,
  			"precipitationProbabilityInPercent" : 5,
  			"locatedAt" : [-16.78, 32.69],
  			"validUntil" : "2016-12-13T11:00:00Z",
  			"validFrom" : "2016-12-13T10:00:00Z",
  
negative.code:                 effectiveCloudCoverInOcta, totalCloudCoverInOcta,cloudCoverLowerThan2000MeterInOcta,cloudCoverLowerThan5000MeterInOcta,cloudBaseHeightInMeter,relativeHumidityInPercent,
                  visibilityInMeter,weatherCode,weatherCodeTraditional,clearSkyUVIndex,airTemperatureErrorInKelvin,windSpeedErrorInKnots,freezingLevelHeightInMeter,
                  freezingRainProbabilityInPercent,noSnowPossibleBelowHeightInMeter,snowCertainAboveHeightInMeter,saturationDeficitInHectoPascal,
                  airTemperatureNearGroundInCelsius,visibilityProbabilityLessThan200MeterInPercent,visibilityProbabilityLessThan1000MeterInPercent,
  				convectivePrecipitationProbabilityInPercent,precipitationProbabilityInPercent,precipitationType,hailProbabilityInPercent,
  				snowFallProbabilityInPercent,thunderstormProbabilityInPercent
  - **PT1H** -    maxWindGustInMeterPerSecond,maxWindGustInKnots,maxWindGustInMilesPerHour,sunshineDurationInMinutes,precipitationAmountInMillimeter,precipitationAmountInInch,
                  maxPrecipitationAmountInMillimeter,directRadiationInJoulePerSquareCentimeter,globalRadiationInJoulePerSquareCentimeter,relativeGlobalRadiationInPercent,
                  freshSnowfallInCentimeter,maxFreshSnowfallInCentimeter,relativeSunshineDurationInPercent,windGustProbabilityGreaterThan40KnotsInPercent,
  - **PT3H** -    maxWindSpeedInMeterPerSecond,maxWindSpeedInKnots,maxWindSpeedInMilesPerHour,maxWindGustInMeterPerSecond,maxWindGustInKnots,maxWindGustInMilesPerHour,
                  minAirTemperatureInCelsius,minAirTemperatureInFahrenheit,minAirTemperatureInKelvin,maxAirTemperatureInCelsius,maxAirTemperatureInFahrenheit,
                  maxAirTemperatureInKelvin,mostLikelyLowAirTemperatureInCelsius,mostLikelyLowAirTemperatureInFahrenheit,mostLikelyLowAirTemperatureInKelvin,
  