Radar, which uses the tools of emitting and reflecting electromagnetic waves to find the enemy. As an over-the-horizon tool, the principle of this thing is actually not complicated. In the beginning, its only function was to receive reflected electromagnetic echoes. However, with the continuous evolution of advanced radar, today's radar can achieve extremely high resolution, and even distinguish the contours of objects.

The radar that Gao Li wanted was not so advanced, his basic principle was the Doppler effect. And the oscillation circuit that wants to make electromagnetic waves has also been realized through the Tesla coil, maybe in the future you can ask Yan Tieren if he has a semiconductor, but now, Gao Li only needs to install a power amplifier device outside the oscillation coil to create the world's first radar.

The two worlds, electrical energy and true qi, have so much in common that it seems to be feasible.

In that case, why not give it a try?

Gao Li now has a very mature True Qi amplification equipment, and it is now in trial operation on the evil base station. These evil base stations can already receive signals from far away through the power amplifier equipment. It's a pity that the connection between evil and evil turns out to be a point-to-point connection. It can't be made into radar equipment, but at present, this kind of evil base station has been distributed all over the railway line, and even around the road transportation line, which brings great convenience to Gaoli's long-range communication.

Back to radar.

There are differences in electromagnetic wave frequency, and the transmittance of electromagnetic waves at different frequencies is different, and the resolution is also different. Gao Li didn't know how far he could go with the oscillation circuit, according to Gao Li's memory, the oscillation frequency of the Tesla coil was not too high, and his impression seemed to range from tens of kilohertz to tens of megahertz. Of course, this could be a memory error or a blind spot. If this is the case, I don't know what the corresponding wavelength of True Qi is. When converted into electromagnetic waves, this wavelength is amazing. It can only be used for long-range over-the-horizon detection.

If you can go up to gigahertz, the effect is different.

The one that can generate Ghz is the microwave tube, the working principle of this thing is quite complicated, the current Gao Li is only in the exploration stage of the microwave tube, although he likes the military, although he has studied for a period of time, but unfortunately he has not firmly remembered. This kind of common thing in the microwave oven can be bought for fifty yuan in Taobao, and no one has thought of inventing one by themselves.

The effectiveness of the radar needs to be further tested to decide, in short, the radar thing must be implemented. With radar, it is possible to guarantee over-the-horizon superiority over the enemy. However, with radar, there is another thing needed, how to feed back the signal monitored by radar?

At this time, Gao Li deeply felt the lack of his own scientific and technological literacy, there is actually no good way at present, the cathode ray tube has not yet been invented, and after thinking about it, it can only be determined by a specific evil to complete the identification and judgment of the signal. It takes training, and it feels like training an AI, but maybe it's faster?

The transmitting antenna connected to the oscillating circuit of the coil is a large receiving antenna pot on the back of a hermit crab-like evil that can be detached in normal times and raised again when used, focusing the signal on the central receiver.

The radar has been established as early as after the success of the Tesla coil, but the priority is not high. After all, the scientific research departments of Yannan and Lizhuang have a lot of things to do, and they have to explore the various requirements put forward by Gao Li. However, now that Gao Li asked for a higher priority, the two sides worked together, and the radar was immediately formed.

The first thing that needs to be overcome in emitting electromagnetic waves is electromagnetic noise interference. Gao Li estimated that True Qi would also have the same noise interference, especially in this world, True Qi is used extremely frequently, and because the oscillation frequency formed by the Tesla coil cannot be determined, this thing needs to be debugged slowly. The optimal combination is found by changing the way the capacitor and the coil are changed. When a stable echo is formed, it is then trained to screen the target as a receiver.

And once the radar is turned on, it may cause interference to ordinary people. This also needs to be cautious, after all, everyone in this world has true qi, and the turn on of this high-power radar will inevitably have an impact on ordinary people. As for what the effects are, we need to determine them experimentally.

Once the radar enters the testing stage, there will be nothing to worry about.

Gao Li decided to go south.

He did a few things before heading south.

He launched Sputnik.

Crafted a high-powered evil rocket beetle.

Although the silver slider is not unusable, it was born for high-speed flight, and its own carrying capacity is insufficient. In order to launch tons of large satellites, Gaoli needed large launch vehicles.

Therefore, Gao Li specially asked Elruo to make a huge carrier beetle fifty meters long and close to five meters thick.

This heavy-duty carrier beetle can carry tens of tons of objects into orbit, which is Gao Li's most frenzied creation at the moment. At the same time, he realized how terrible the creature was. It can be transformed into almost the necessary form as long as it is needed. It can only be said that the evil people back then did not have the knowledge of Gao Li, if there was a Gao Li behind them, maybe he would have unified the world back then.

Some of the specific anomalies have been tested and do not need air to survive. They can survive in the universe all the time, they don't need food, they don't need air, they can survive just by relying on their own true qi. Install high-powered amplifiers on them so that they can provide navigation for Gaoli above the sky.

This brings us to triangulation.

The so-called triangulation method means that if a unit is captured by a triangular distribution of signals at the same time, the position of this unit can be determined by calculating the delay of these three signals.

However, the current level of technology is not up to the mark, and there is no way to accurately calculate the signal difference. So, how do you get location information?

Answer, this needs to be calculated by the synchronization of the three evil brains. There are precedents for this, for example, the human brain can calculate the distance difference between the propagation time of sound between two ears to get a sense of the distance of sound, and even calculate the reflex difference of the pinna to get a more precise orientation. This is something that humans themselves are not aware of, and they are all acquired through training. There is also the eye, and the visual signals obtained by the two eyes of the human body are synthesized into positional signals in the brain. People themselves are not aware of it, the brain calculates it by itself, and represents it subconsciously.

The same can be true of the anomalous, they have more brains, as long as there are enough stimuli. It can get a relatively accurate data, which cannot be quantified, but it is enough to give Gao Li a relatively accurate navigation.

The giant carrier beetle can only carry one navigation satellite at a time, and in order to ensure sufficient power, these navigation satellites are made very large. In the Gao Li plan, there will also be a detection of evil in the later stage, and they will carry large optical components. But that's for later.

It took Gao Li more than a month to do this, and although the cultivation of evil was very fast, it was very labor-intensive to adjust it in the later stage, and this more than a month of time was basically just an approximation. Radar anomalies need to be learned, and satellites in geosynchronous orbit need to be studied. It all takes time to add up, and Gao Li put some beetle locators on the truck that runs long distances all day, and let the three evil spirits in the sky learn on their own.

Gao Li couldn't wait any longer, and heard that the number of terrorists on the islands in the East China Sea was increasing rapidly. He didn't know when the war would break out, and before that he had to make a trip to the south.

In this month's time, Gao Li built a ground-effect aircraft, which is simpler than the structure of an airplane, and the installation and commissioning are very simple. High safety factor. The main reason why the heavy-duty carab is not chosen is because the heavy-duty carab is too large and its own true gas volume is too high. If the other party has the kind of person who is particularly sensitive to true qi, he can find out at once.

This kind of ground effect aircraft is different, because it sails close to the sea surface and has better concealment. The most important thing is that it can be turned off and parked on the sea at any time.

In addition to Ling Long, Gao Li also specially selected a team of soldiers and ants, ten light fighters, and ten heavy warriors to form Gao Li's reserve force.

Hopefully, these people won't be needed, though. After all, Gao Li's plan was mainly reconnaissance, not war. If it is according to everyone's martial arts, it may not be possible to win if you really fight.

No, let's be honest, you can't win.

So on this day, Gao Li and they set off. Heading to the southern continent, the ground effect aircraft was transported away early, because this thing was too noisy, and if it was to walk in the city, it would probably be deafening.

Fortunately, there are almost no rough roads to the beach from here, and the ground effect aircraft can fly at a height of about a few meters, and can quickly climb to an altitude of hundreds of meters in case of real danger, although the maintenance time is very short, but it is enough to avoid obstacles.

And once in the sea, it's even simpler. As long as there are no strong winds and waves, this airplane-like thing can fly at extremely high speeds. Although it is not as fast as an airplane, it can reach a speed of at least 500 kilometers per hour.

Gao Li didn't know exactly how long the specific journey to the Southern Continent was, and this ground-effect aircraft had passed through various harsh environments along the way, but with Ling Long's protection, it didn't lose anything, and it didn't even slow down. Occasionally, Ling Long would even push it to make it fly faster.

Gao Li left around six o'clock in the evening, and by the early morning of the next day, they finally arrived at the Southern Continent.

That's right, although it is located in the south, the location of Yannan City and the southern continent is almost in the same time zone, and there is no need to reverse jet lag at all.

A small euglena is released, and the coastline can already be seen in the distance. Gao Li ordered the soldiers to stand by here, and then he and Ling Long boarded the boat and headed for the mainland.

The southern continent looks different from the coastline that Gao Li recognized. The coastline of ordinary places looks silvery-white, but the coastline here is black.

That's probably what you want to shade from the sun.

As the boat approached, a sweet smell gradually filled the air. Yes, that's right, it's sweet.

Gao Li is a little strange, aren't you blood shadow people, why is there not a smell of blood in the air, but a sweet smell?

Just as he was thinking about it, he saw a small boat floating in the distance, the boat did not know what kind of material it was, it was pure black, and it was covered with a small shed. After Gao Li and their boat approached, they looked over and saw two figures looming in the shed.

"Fellow, hello?" Gao Li pondered for a moment and said nonsense.

A voice came from inside the ship: "Hello, stranger, can you help us get back into the shadows?"

The voice sounds pretty good, and he doesn't look very old.

Gao Li's AR vision shows that there are two people in the ship, and there are more than 100 cultivators.

What about everyone who is said to be martial?

Gao Li glanced back at Ling Long and nodded slightly. Ling Long raised his hand, and with a soft force, he pushed the small boat, and the two small boats leaned towards the shore at the same time.

On the edge of the beach, Gao Li looked at a group of people standing from a distance, all of them were red, and most importantly, they were all martial artists!

Looking at the two people in the boat, Xiu Wei also improved rapidly as he approached the coast.

Finally, the ship came into the shadows, and the cultivation of the two people in Gao Li's eyes quickly climbed to the martial pole!

Then, two little girls with red bodies came out.

"Thank you! you saved our lives!" said the two little girls happily.

Only then did Gao Li see clearly that the bodies of these two little girls were actually liquid! But whether or not their bodies were composed of blood, Gao Li didn't know, because they had always exuded a sweet aroma. It stands to reason that red blood should be iron-contained, and it should be the fishy smell of rust.

Two little girls took over the boat and came to the shore at high speed, when the boat washed up on the beach. They jumped out of the boat and came to the shore.

Then, it seems, the two of them were criticized quite seriously. They all lowered their heads, but they still looked at Gao Li from time to time.

Gao Li and Ling Long also came to the shore and jumped off the boat, Gao Li's feet were washed by the sea. It was Ling Long, who came to the beach until he fell.

A blood shadow man who looked like an adult man walked over and arched his hand, "Thank you, stranger, if it weren't for you, my two children would really die in the sea." ”

Gao Li said: "You're welcome, the child is naughty, and don't be too strict." ”

The Blood Shadow Man approached Gao Li and said, "Are you a shell person? ”

Shell people?

This name is fresh.

"I don't quite understand this. Gao Li said with a smile.

"Legend has it that there are people who hide in a shell to protect themselves from the sun and the sea," the man said. I didn't believe that I could walk freely, but now that we see you, we believe it. ”

Gao Li smiled: "We've only heard of the Blood Shadow Man, but we didn't expect to actually see it today!"

The man clapped his hands and said, "In any case, you are a guest from afar! You are the benefactor of my child! I have to repay you well today! Please come to my house!"