POLAR CAP ABSORPTION

Domain	Definition
Electrical Engineering	The intense absorption of radio waves caused in a polar cap by the arrival of high-energy solar protons, concentrated in this region by the lines of force of the Earth's magnetic field. Source: European Union. (references)
Solar	An anomalous condition of the polar IONOSPHERE whereby HF and VHF (3 - 300 MHz) radiowaves are absorbed, and LF and VLF (3 - 300 kHz) radiowaves are reflected at lower altitudes than normal. In practice, the absorption is inferred from the proton flux at energies greater than 10 MeV, so that PCAs and PROTON EVENTs are simultaneous. Transpolar radio paths may still be disturbed for days, up to weeks, following the end of a proton event. (PCA). (references)
Source: compiled by the editor from various references; see credits.

Anagrams: POLAR CAP ABSORPTION

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "a-a-a-b-c-i-l-n-o-o-o-p-p-p-r-r-s-t"
	-5 letters: proportionals.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.

Alternative Orthography: POLAR CAP ABSORPTION

Hexadecimal (or equivalents, 770AD-1900s) (references)

Leonardo da Vinci (1452-1519; backwards) (references)

Binary Code (1918-1938, probably earlier) (references)

HTML Code (1990) (references)

ISO 10646 (1991-1993) (references)

Encryption (beginner's substitution cypher): (references)

Specialty Definition: POLAR CAP ABSORPTION