In today’s world of fast communications, scientists have discovered many things that we cannot imagine. There are many hidden facts about the Earth and its surroundings, and we are unaware of them. There are many types of propagations all around the globe. Trans Equatorial Propagations is also one of the types of propagations. The topic of our today’s discussion is transequatorial propagations. We will briefly discuss what kind of propagation is transequatorial propagation and the facts and features of this propagation.
Transequatorial propagation, TEP is one of the kinds of propagation that plays its part when the signals are transmitted across the equator. Moreover, it allows communications when no one expects. We can say that this kind of propagation is unusual propagation. In the mid of twentieth century, some radio amateurs and military operators discovered the transequatorial propagation. They were retrying to communicate from one equator to another. And during this communication, they observed the transequatorial propagations. It seemed like the paths for the propagation were open at first. Still, after the theory and some calculations made by the military operators and radio amateurs, it was suggested that the paths should not be open. After the discovery of transequatorial propagation, it is studied by the radio amateurs known as well to identify any changes.
The communications of the distances between 2500 to 5000 kilometers are all supported by the Trans equatorial propagations. They create paths from north to south and then south to north to make the communications successful. The occurrence of the transequatorial propagation is possible in the evening or the afternoon. During this time, some of the contacts were restricted. It was 6 meters for HAM radios, handled HAM radios and mobiles HAM radios in many countries. The transequatorial propagations occur in local time, and limited contacts are made during this time. TEP occurs on the equator as well. Polar, Temperate, and Equatorial are the three common and superior zones of the Earth’s atmosphere. The density of the equatorial ionosphere is more than the other regions of the atmosphere. In these polar and equatorial regions, some unusual and unexpected variations also occur. If there is a high electron concentration on any of the sides of the equator, then an equatorial anomaly will occur. When the signal is reflected on one side of the equator by the anomaly, then the TEP will occur, and the signals will reflect on the other side again in the same way.
The main characteristic of the TEP that occurs in the afternoon is that it maximizes the usable frequency up to 60 MHz. The propagation is also in local time. When the sunspot is high, then it will occur many times. The length of the path will range from 5000-6500 kilometers due to TEP. Moreover, TEP helps to make the signals stronger. The signals will not be faded pr distorted anymore.
On the other hand, the evening TEP also occurs at local time, but it is a bit change. Unlike afternoon TEP, evening TEP fades and distorts the signals. But the length of the paths in evening TEP is from 3000-8000 kilometers.
The information mentioned above was all about Transequatorial propagation, and I hope it will help you know about it.