Distance and bearing
How far is the other station, and where does the rotator need to point? Enter two points as locators or coordinates, the rest follows straight away.
Distance and bearing
Great circle over the sphere. For the rotator, the azimuth from A to B is what counts.
waiting for input
How the page calculates
- Great-circle distance using the haversine formula, earth radius 6371.0088 km
- Nautical miles = km · 0.539957
- Travel time = distance / 299,792.458 km/s
It calculates the great circle over the sphere, the shortest path over the earth's surface. The azimuth there is the direction from A to B that counts for your rotator. The azimuth back is the direction the other station has to turn towards you; over long paths that's not simply the reverse.
Both fields take a locator (four or six characters) or coordinates, such as 47.4,8.5. You also get the signal's travel time on this path.