Services_Weather_Common::calculateDewPoint() --
Calculate dewpoint from temperature and humidity This is only an
approximation, there is no exact formula, this one here is called
Magnus-Formula
Services_Weather_Common::calculateHumidity() --
Calculate humidity from temperature and dewpoint This is only an
approximation, there is no exact formula, this one here is called
Magnus-Formula
Services_Weather_Metar::setMetarDB() --
Sets the parameters needed for connecting to the DB, where the location-
search is fetching its data from. You need to build a DB with the external
tool buildMetarDB first, it fetches the locations and airports from a
NOAA-website.