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Aviation weather test #2
Chapters 5, 6 and 7
Terms in this set (16)
Microscopic particles such as dust and salt, that provide surfaces on which water vapor undergoes condensation to form water droplets or deposition to form ice crystals.
The process by which heat is conducted away from the watermen air to the colder earth.
warm humid air over a cold surface
Fog that is generally less than 20 feet deep. (Shallow radiation fog)
Fog that occurs when radiational cooling of the earth's surface lowers the air temperature near the ground to or below its initial dew point on calm, clear nights.
Air is cooled adiabatically as it moves upslope and cooled by contact with the cold ground, especially after sunset.
When very cold, dry air moves over warm water, air very close to the surface picks up water vapor from the strong evaporation
Different sky conditions
-CLR (Clear Sky)
FEW-->1/8 to 2/8
SCT-->3/8 to 4/8
BKN-->5/8 to 7/8
The greatest horizontal distance at which objects or bright lights can be seen and identified half of the horizon circle.
The horizontal visibility determined from the control tower.
Runway Visibility (RVV)
Visibility from a particular location along an identified runway. Reported in SM.
Runway Visual Range (RVR)
The maxima horizontal distance down a specified instrument runway that a pilot can see and identify standard high intensity lights. Reported in hundreds of feet.
-Ceiling >3000 feet AGL
-Ceiling 1,000 to 3,000 feet AGL
-3 to 5 sm
-ceiling 500 to < 1,000 feet
-Visibility 1 to 3 sm
-<500 feet AGL
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