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Pressure Measurement: Difference between revisions
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→Locating the Barometer: break into 2 paragraphs for easier reading
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==Locating the Barometer==
For most personal weather stations, the barometer is in the console, usually attached to the printed circuit board. These barometers are very cheap devices that simply record the load on a diaphragm.
Unlike the barometer in a professional automatic weather station, they have no temperature compensation. Therefore, for best pressure readings, you should locate the console in a place where the temperature is reasonably constant, not in direct sunlight or near a heater.
==Units==
** In those sites following USA guidance, the SLP pressure is reported in the Remarks Group of the METAR. There are METAR readers available that extract the SLP wherever it is within a METAR, but Saratoga does not.
* A further complication is that QFE is defined in two ways:
*# In USA,
*# The international standard, used elsewhere in world, uses the true ''airport field elevation'' (
* Finally, it should be noted that all METAR pressures in Pressure Group are rounded down to nearest mBar, so may read up to 0.9 mBar out from a reading expressed to nearest tenth of millibar.
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