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MODE: CURRENT WIND SPEED WITH ALTITUDE
Choice of altitude measurement unit:
The altitude can be shown in m (metres) and ft (feet) . Please note that above 9,999
feet the Xplorer 4 will only read in meters due to the limit on the LCD . To change
the units press and hold the button for approximately 4 seconds and the units will
change . Release the button when the desired units are displayed and the instrument
returns to the mode of measuring the instant wind speed with display of the altitude .
This setting will remain until changed again, even after turning the Xplorer 4 off .
Altitude explanation:
ALL altimeters calculate altitude based on a known elevation, and
measure the change in air pressure to determine the change in
altitude, often measured as the height above Mean Sea Level
(MSL) . The Xplorer 4 uses a Swiss barometer, which is used for
both the air pressure reading and altimeter functions . The terms
altitude and elevation are often used interchangeably, however
technically elevation is a point on the earth’s surface (mountains for
example) and altitude points above the earth’s surface (airplanes
and structures for example) . The altitude displayed by the Xplorer
4 is the height above mean sea level .
Altitude and air pressure relationship:
Air pressure decreases approximately 0 .01 inHg for every 10 feet
increase in altitude (at altitudes below 5,000 ft above MSL) . Since altitude is based on air pressure,
the change in air pressure from weather patterns will affect the altimeter reading . For example an
incoming storm can lower barometric air pressure by 0 .06 inHg in an hour, resulting in a change in
altitude measured of 60 feet . This is a normal occurrence! Altimeter and barometer readings will also
be affected by an external pressure source, for example a well-sealed building or a moving car . The
Xplorer will take between 5 and 20 seconds to adjust to a new altitude reading . The SKYWATCH Xplorer
4 uses a sensitive Swiss barometer and can sense a change in altitude of one foot (0 .3 meters) .
Mount McKinley has a larger bulk and
rise than Mount Everest. Even though
the summit of Everest is about 9,000 feet
(2,700 m) higher as measured from sea
level, its base sits on the Tibetan Plateau
at about 17,000 feet (5,200 m), giving it
a real vertical rise of a little more than
12,000 feet (3,700 m). The base of Mount
McKinley is roughly a 2,000-foot plateau,
giving it an actual rise of 18,000 feet
(5,500 m).has a lower elevation of 20,000
feet, yet because its base is at 2,000 feet,
the actual vertical rise is 18,000 feet -
6,000 feet more than Mt. Everest!
