anchor.diff:      + observedFrom: `2016-10-15T08:00:00Z` (string, optional) - ISO8601 timestamp notation, means incl. this timestamp; always provide a time offset, e.g. 'Z' for UTC; optional: a request may provide correct offset (so that server can convert to UTC).
       + observedUntil: `2016-10-15T09:00:00Z` (string, optional) - ISO8601 timestamp notation, means incl. this timestamp; always provide a time offset, e.g. 'Z' for UTC; optional: a request may provide correct offset (so that server can convert to UTC).
       + observedPeriod: `PT0S,PT1H,PT3H,PT12H,PT24H` (string, required) - comma separated list of periods to be retrieved. use ISO8601 time duration notation. PT0S refers to observations at a moment in time. PT1H applies one hour aggregation.
  +    + timeZone: `Europe/Paris` (string, optional) - Time zone refers to the IANA Time Zone Database (TZDB).
   
   ### Search for observation data for multiple given locations [GET]
   
  
positive.code:                 "meteoGroupStationName": "Pleucadeuc",
                  "stationLocation": [ -2.2323, 47.4593 ],
                  "stationTimeZoneName": "Europe/Prague",
                  "observedFrom": "2016-10-15T07:00:00Z",
                  "observedUntil": "2016-10-15T08:00:00Z",
                  "observedPeriod": "PT1H",
                  "windGustInMeterPerSecond": 0.8231112,
                  "windGustInKilometerPerHour": 2.9632,
  
negative.code:                 "meteoGroupStationName": "Pleucadeuc",
                  "stationLocation": [ -2.2323, 47.4593 ],
                  "stationTimeZoneName": "Europe/Prague",
                  "observedFrom": "2016-10-15T10:00:00+02:00",
                  "observedUntil": "2016-10-15T11:00:00+02:00",
                  "observedPeriod": "PT1H",
                  "windGustInMeterPerSecond": 0.97744447,
                  "windGustInKilometerPerHour": 3.5188,
  