Okta 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 how many eighths of the sky are covered in cloud, ranging from 0 oktas (completely clear sky) through to 8 oktas (completely overcast). In addition, in the SYNOP code there is an extra cloud cover indicator '9' indicating that the sky is totally obscured (i.e. hidden from view), usually due to dense fog or heavy snow. When used in weather charts, okta measurements are shown by
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