# The Wireless Telegraphy (Licence Charges) Regulations 2020, Paragraph 2

Extent: E+W+S+N.I.

The formula is—
where—
“S” means the sum;
“RR” means a reference rate of £3,300, being the fee payable for an authorisation under a licence for use of a 8.33 kHz channel over a surface area of 71,000 square nautical miles;
“SA” means 71,000, being the number corresponding to the surface area (in square nautical miles) of the United Kingdom;
“π” means 3.142;
“h” means the number corresponding to the height (in feet) of the designated operational coverage specified in the licence granted to the licensee; and
“r” means the number corresponding to the radius (in nautical miles) of a circle of equivalent area to the designated operational coverage specified in the licence.

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Source: https://www.legislation.gov.uk/uksi/2020/1068/schedule/15/paragraph/2 (the official version)
Page: https://openlegislation.uk/wireless-telegraphy-licence-charges-regulations-2020/schedule-15/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.