// Logbook
World Map
Every contact in my log with a known locator, plotted from my QTH. Spin the globe to see the real great-circle paths the signals took.
Drag to spin · scroll or pinch to zoom · click a contact for details
- QSOs plotted
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- Unique callsigns
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- Countries
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- Grid squares
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- Furthest
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23 QSOs in the log had no locator and are not shown.
Click a contact on the map to see the path, distance and bearing.
Globe – an orthographic view of the Earth as a sphere, so nothing is stretched. Each path is a great circle: the shortest route over the surface, and the line a signal follows. When you pick a contact the globe turns to look straight down on the middle of its path, so you see it as a straight line.
Azimuthal – an azimuthal equidistant map centred on M0PEE. Every path from here is a straight line, its direction is the true beam heading and its length is in proportion to the real distance, so paths can be compared directly. Shapes far from the centre are distorted; the edge of the disc is the antipode, 20,015 km away.
Flat – the familiar latitude / longitude map. The same great-circle paths appear bent here, and distances near the poles look much longer than they are.
Distances use a spherical Earth (radius 6,371 km), which is within about 0.5 % of the true ellipsoid. Positions come from each station's locator, so a 4-character square is accurate to roughly ±100 km.