Okta to traditional approaches, satellite images do not account for cloud composition. Oktas are often referenced in aviation weather forecasts and low level forecasts: SKC = Sky clear (0 oktas); FEW = Few (1 to 2 oktas); SCT = Scattered (3 to 4 oktas); BKN = Broken (5 to 7 oktas); OVC = Overcast (8 oktas); NSC = nil significant cloud; CAVOK = ceiling and visibility okay. Okta In meteorology, an okta is a unit of measurement used to describe the amount of cloud cover at any given location such as a weather station. Sky conditions are estimated in terms of
Units of textile measurement pressure difference of 10 cm head of water", also known as the Gurley unit. Factors that affect air permeability include porosity, fabric thickness and construction, yarn density, twist, and crimp, layering, and moisture within the fabric. The concept of air permeability is important for the design of active wear and insect netting. The unit Martindale quantifies a textile's resistance to abrasion when used for upholstery. Units of textile measurement Textile fibers, threads, yarns and fabrics are measured in a multiplicity of units. Micronaire is a measure of the air permeability of cotton fiber and is an indication of fineness and