Use a ruler.
An Okta is a measurement unit used to describe cloud cover over a defined area. In aviation 10% cloud cover is considered one peg up from clear to a few clouds, mainly scattered.
One Okta = One eighth of the sky covered by cloud.
Cloud cover is usually given as a percentage, there is no unit of measure.
There are instruments called Ceilometers which can measure cloud height and cover, but they're not especially accurate for cover (they are quite good for cloud height, especially at night) as a cloud can sit over the instrument and give a false reading. Also, unless cloud passes over them they give a false negative. The best instrument for measuring cloud cover is a trained Mark I eyeball (or two)Read more: What_instrument_is_used_to_measure_clouds
Oktas measure cloud cover, specifically the amount of sky covered by cloud. It is usually measured in eighths, with 0 oktas representing clear sky and 8 oktas representing completely overcast sky.
Cloud Cover
Cloud cover is usually given as a percentage, there is no unit of measure.
An Okta is a measurement unit used to describe cloud cover over a defined area. In aviation 10% cloud cover is considered one peg up from clear to a few clouds, mainly scattered.
One Okta = One eighth of the sky covered by cloud.
Cloud cover is usually given as a percentage, there is no unit of measure.
There are instruments called Ceilometers which can measure cloud height and cover, but they're not especially accurate for cover (they are quite good for cloud height, especially at night) as a cloud can sit over the instrument and give a false reading. Also, unless cloud passes over them they give a false negative. The best instrument for measuring cloud cover is a trained Mark I eyeball (or two)Read more: What_instrument_is_used_to_measure_clouds
Pressure, wind direction, wind speed and cloud cover
There are instruments called Ceilometers which can measure cloud height and cover, but they're not especially accurate for cover (they are quite good for cloud height, especially at night) as a cloud can sit over the instrument and give a false reading. Also, unless cloud passes over them they give a false negative. The best instrument for measuring cloud cover is a trained Mark I eyeball (or two)Read more: What_instrument_is_used_to_measure_clouds
Cloud cover is a noun. "Expect lots of cloud cover today."
Oktas measure cloud cover, specifically the amount of sky covered by cloud. It is usually measured in eighths, with 0 oktas representing clear sky and 8 oktas representing completely overcast sky.
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Meteorologists measure the amount of cloud cover in the sky using a unit of measurement called an "okta." Basically, one okta is one eighth of the sky that is covered in cloud. The severity of cloud cover ranges from zero oktas to eight, with zero being a completely clear sky and eight oktas being complete cloud cover. It can be fun to observe how the cloud cover will differ from day to day and even from hour to hour. What do you think is responsible for these changes