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Details about items of the SSCTool, Syride Screen Configuration Tool
(A "NO GPS" on an item
means that it is waiting for GPS signal reception to display the
information) :
GNSS Altitude : is given by the GNSS. It is the vertical distance between you and the mean sea level.
This is a reliable altitude but can be inaccurate in case of bad GPS signal reception (electromagnetic
disturbance caused by radio, Phone relay antenna, other instruments...). International Aeronautical
Federation (FAI) advocates the use of pressure altitude (QNH see below).
QNH altitude : This altitude initially uses the GPS signal until the vertical accuracy is less than 6m.
Then it uses the ambient pressure to calculate your altitude. If you mount your instrument by one meter
with your hand, the altitude will rise by one meter (which will not be necessarily the case with GPS
altitude). This altitude is accurate, but may become less reliable if you are flying a long time or traveling
a long distance.
QNE altitude : is your current pressure altitude, supposing the current pressure at mean sea level is
1013.25 hPa. This information is required for airspaces that are described in "flight level".
Vario : is your vertical speed (ascent or descent). Vario smoothing is possible from the Settings page
of the SYSPCTOOL software.
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