anemometer [anemometer: A device for measuring wind speed.] oktas [oktas: A unit used to express the extent of cloud cover. It is equal to one-eighth of the area of the sky. ] anticyclone [anticyclone: High pressure systems, giving clear skies and gentle wind.]
In this manner, how do we measure cloud cover?
The amount of cloud cover is usually given in units called oktas. You can use a cloud mirror to simply measure oktas. Divide a large mirror into a grid with 16 equal squares using a dark crayon. Lay the mirror on the ground somewhere you can see the whole sky.
What is the name of the instrument used to measure clouds?
A ceilometer is a device that uses a laser or other light source to determine the height of a cloud base. Ceilometers can also be used to measure the aerosol concentration within the atmosphere.
How is the clouds and fog measured?
Total cloud amount is the fraction of the sky covered by cloud of any type or height above the ground. Partial cloud amount is the fraction of the sky covered by each type or layer of cloud as if it was the only type or layer of cloud in the sky. 9 oktas represents sky obscured by fog or other meteorological phenomena.