asymptotic direction of arrival

The direction at infinity of a positively charged particle, with given rigidity, which impinges in a given direction at a given point on the surface of the earth, after passing through the geomagnetic field.

Related terms:

• asymptotic cone of acceptance
• great-circle direction
• arrival time
• magnetic wind direction
• wind direction
• swell direction
• magnetic direction
• true wind direction
• prevailing wind direction
• wind-direction shaft