Meteorology Flashcards
How is QNH calculated and what will it read while on the ground?
QNH is calculated by taking QFE and reducing it to sea level using ISA values, and should read station elevation while on the groun.
What does QFF measure and using what information?
QFF measurs the station pressure adjusted to MSL using actual met conditions. This is used by meterorologists and is the pressure displayed on the isobar charts.
What is QNE and when is it used?
- QNE is not a pressure setting but the height of the touch down point when 1013.2 is allcoated.
- This is used at airfieds that may be to high and the setting would be to low if QNE is used.
What is the pressure difference multiplied with to get total alt difference in Ft and M?
- 27ft
- 8m
When will QNH & QFF be the same?
QNH & QFF will be the same when temperature is = ISA Temperature
When the temperature is colder than ISA then QFF will be?
QFF will be lower than QNH
When will QFF be higher than QNH on a cold day?
When the airfield is below sea level.
Except for ISA conditions when is QNH correct?
When the aircraft is on the ground
An area of low pressure rotates_______in the southern hemisphere?
Clockwise
An Area of high pressure rotates _______ in the southern hemisphere?
Anti-Clockwise
An Area of low pressure rotates ________ in the northern hemisphere?
Anti-Clockwise
An aircraft travelling from high pressure to low pressure would experience what barometric error?
The true altitude would decrease
If you have a constant idicated altitude and have right hand drift (starbourd drift) the true height would?
decrease as you would be going from high pressure to low pressure.
The composition of the atmosphere is?
- N2 = 78%
- O2= 21%
- CO2,O3 and other gasses = 1%
The process of heating the atmosphere is…
The suns short wave radiation hits the earth and is released as long wave radiation that warms the lower levels of the atmosphere
