What causes tropospheric pipeline?
tropospheric pipeline occurs when the radio signal reflects from the troposphere and continues on the way that allows the signal to travel much further than it would normally. This happens when the temperature in the atmosphere experiences a shift called inversion. When the temperature inversion occurs, the radio waves are discouraged, which would normally continue to space behind the Earth's atmosphere and continue to follow the curvature of the planet. Radio waves were able to travel in excess of 1,000 miles (about 1600 km) due to tropospheric pipeline.
The troposphere of the Earth is the lowest layer of atmosphere. It extends from 4 to 40 miles (about 6 to 60 km) above the surface. Under normal conditions, this layer of radio waves allows you to go into the upper atmosphere. Other layers, such as the ionosphere, prevent waves to reflect higher and return to the ground.
During meteorological instability, the properties troposphere can change. When the cold air that is low to the ground passes through the warmer air mass, it causes a condition called tEplotic inversion. The cold air near the ground moves slower than warm air. This means that radio waves that encounter temperature inversion will be transmitted faster through the cold matter, bending the wave path down and allowing it to curvature the surface.
The period of relatively quiet weather with a clear sky is when the most common tropospheric pipe is experienced, indicating high -pressure queues that can cause temperature inversions. At the moment, air mass has a high refractive index, causing radio waves to move more slowly and helping to bend their trajectory. The actual landscape between the source of the signal and the horizon can also affect the distance it can travel, with a flat soil and is the most effective.
There are other natural events that can cause tropospheric pipes. The cause may be cold water coming from water water under the sun's upper air massesAmi. In some areas of the Mediterranean, the effect may take months at a time.
The whole branch of enthusiasts has evolved around the tropospheric pipe and more generally about tropospheric spread. People trying to receive long -distance signals through tropospheric pipes are called DXERS. The term comes from the DX radio code that means distance. DXERS are classified according to groups depending on the type of signal trying to detect. These signals can be radio, ultra -high frequency (UHF) or very high frequency (VHF).