Temperature and Pressure Flashcards
What unit is temperature reported in?
Degrees celsius.
What is the dew point?
The temperature at which the air just becomes saturated (ie 100% humidity).
How is temperature reported and rounded?
Temperature is recorded in whole degrees and always as 2 digits. Any .5 value is rounded to the warmer value for safety reasons.
How are negative temperatures reported?
They are prefixed with an M. For example, -2 degrees is reported as M02.
How is a temperature just below zero reported (ie -0.4 degrees)?
M00
What is the difference between 00 and M00?
00 relates to 0 to 0.4 degrees and M00 relates to -0.5 to -0.1 degrees.
What is QNH?
Q Nil Height. Atmospheric pressure when corrected to mean sea level using the ICAO standard atmosphere.
What is QFE?
Q Field Elevation. Atmospheric pressure at the aerodrome height.
Near sea level, what height is 1 hPa approximately equal too?
30 feet.
How is pressure reported and what are the rounding rules of?
Pressure is reported as 4 integers and is ALWAYS rounded down, no matter the value. Even .9 values are rounded down (ie 1016.9 is 1016).
