anchor.diff:  			"meteoGroupStationId": "8522",
   			"precipitationAmountInMillimeter": 0,
   			"validUntil": "2016-12-13T12:00:00Z",
  -			"maxWindGustInMeterPerSecond": 4.4242234,
  +			"maxWindGustInMeterPerSecond": 4.4,
   			"validFrom": "2016-12-13T11:00:00Z",
   			"validPeriod": "PT1H"
   		}
  
positive.code: 			"meteoGroupStationId": "8521",
  			"precipitationAmountInMillimeter": 0,
  			"validUntil": "2016-12-13T11:00:00Z",
  			"maxWindGustInMeterPerSecond": 4.2184453,
  			"validFrom": "2016-12-13T10:00:00Z",
  			"validPeriod": "PT1H"
  		},
  
negative.code: 			"meteoGroupStationId": "8521",
  			"precipitationAmountInMillimeter": 0,
  			"validUntil": "2016-12-13T12:00:00Z",
  			"maxWindGustInMeterPerSecond": 5.5,
  			"validFrom": "2016-12-13T11:00:00Z",
  			"validPeriod": "PT1H"
  		},
  