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Diffstat (limited to 'info')
| -rw-r--r-- | info/blueshift.texinfo | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/info/blueshift.texinfo b/info/blueshift.texinfo index 7984afc..27c9dd8 100644 --- a/info/blueshift.texinfo +++ b/info/blueshift.texinfo @@ -1332,9 +1332,16 @@ astronomical twilight, measured in degrees. Blueshift includes the function @code{whether} which gives a brief weather report. @code{whether} -takes one argument: the International Civil Aviation -Organization (ICAO) code of your closest airport. -If Blueshift is unable to download the latest METAR +takes one manditory argument: the International +Civil Aviation Organization (ICAO) code of your +closest airport. It also takes one optional argument, +@code{downloader}: an function that takes an URL +to download as its only parameter and returns a +command, as a list of arguments, that downloads +the file at the given URL to standard output. +The default @code{downloader} is +@code{lambda url : ['wget', url, '-O', '-']}. If +Blueshift is unable to download the latest METAR (Meteorological Aerodrome Report) @code{whether} will return @code{None}. If successful it will return the sky conditions (assumed clear if not @@ -1363,6 +1370,14 @@ approximate. The weather is reported as an string list, that can and often is empty. +Airports should publish METAR (Meteorological +Aerodrome Report) reports at XX:20 and XX:50, +it can presumable take some time before the +collection server we use (weather.noaa.gov) have +received it. Additionally some airports do not +update while closed, and updates while closed +are less accurate. + @node Running without X |