anchor.diff:  
   code  description                           comment
   ----  ------------------------------------  --------------------------------------------------------
  -   0  increasing_then_decreasing            atmospheric pressure the same or higher than 3 hours ago
  +   0  increasing_then_decreasing              | atmospheric pressure the same or higher than 3 hours ago
      1  increasing_then_steady                  |
      2  increasing                              | atmospheric pressure now higher than 3 hours ago
      3  decreasing_or_steady_then_increasing    |
  -   4  steady                                atmospheric pressure the same as 3 hours ago
  -   5  decreasing_then_increasing            atmospheric pressure the same or lower than 3 hours ago
  +   4  steady                                  | atmospheric pressure the same as 3 hours ago
  +   5  decreasing_then_increasing              | atmospheric pressure the same or lower than 3 hours ago
      6  decreasing_then_steady                  |
      7  decreasing                              | atmospheric pressure now lower than 3 hours ago
      8  steady_or_increasing_then_decreasing    |
  
positive.code: 
      + Headers
  
              X-Api-Key:  gGf8JqkD6h4cq6em6HY609isFK85nJnp7iNUgggi
              Or
              Authorization: Bearer eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.EkN-DOsnsuRjRO6BxXemmJDm3HbxrbRzXglbN2S4sOkopdU4IsDxTI8jO19W_A4K8ZPJijNLis4EZsHeY559a4DFOd50_OqgHGuERTqYZyuhtF39yxJPAjUESwxk2J5k_4zM3O-vtd1Ghyo4IbqKKSy6J9mTniYJPenn5-HIirE
  
  + Response 200 (application/json)
  
  
negative.code: If observedFrom and observedUntil are missing then application sets observedFrom as current time minus 3 hours and observedUntil as current time.
  if observedFrom is not missing and observedUntil is missing then application sets observedUntil as observedFrom plus 3 days ahead.
  There is possible to use station ID parameter instead of location parameter. in order to get observation for concrete station.
  The observations are available only from now and 7 days back. Data that are older than 7 days are expired(deleted) from Data Storage.
  
  *Meteorological hints*
  
  