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The "grey
line" is a band around the Earth that separates
daylight from darkness. Propagation along the
grey line is very efficient. One major reason
for this is that the D layer, which absorbs HF
signals, disappears rapidly on the sunset side
of the grey line, and it has not yet built upon
the sunrise side. Ham radio operators and
shortwave listeners can optimize long distance
communications to various areas of the world by
monitoring this band as it moves around the
globe.
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The
Current Time in Highfields is |
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Australian Eastern Standard Time |
Universal
Coordinated Time
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Current
Grey line map of the Earth's surface
This page
updates every 5 minutes
View from
36000 km above our QTH at 27°28'S 151°56'E
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Current view Earth's surface from the
sun |
Current view Earth's surface from the
Moon
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Maps provide by Earth and Moon Viewer
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