In the early days of the "radar" technology, clouds, fog, rain, and haze would cause certain echo interference to the radar. Some of the electromagnetic waves emitted by the radar will be reflected, absorbed, or scattered by these things, resulting in unstable results.

However, as technology advances and radars become more and more accurate, the electromagnetic waves emitted by them are often confined to a very narrow frequency band, and the noise floor of interference can be filtered out by modulation techniques.

In the 21st century, except for a small number of weather radars that specifically limit electromagnetic waves to specific bands, the vast majority of radars will not be interfered with by clouds and fog.

However, the essence of "fog" is an aerosol of water particles that uses air as a dispersant. If this "particle" had been replaced with a sheet of metal, then things would have been different.

The frequency range of electromagnetic waves that water molecules can absorb and reflect is quite limited, but metals can interfere with most electromagnetic waves.

A not too dense mass of aerosol, in the field of view of the microwave radar, may not be much different from a small flying object.

And this kind of moving object that has not been identified by friend or foe is very likely to be judged as an "enemy" by automatic weapons, and then fire autonomously.

This is a complete waste of ammunition against the air, and it will also reveal its own arrangement in advance.

Balbo immediately closed his eyes and ordered the entire unit to separate the microwave radar from the fire control system and connect it to the sonar radar.

The vast majority of vehicles are equipped with both of these features.

However, Balbo soon opened his eyes angrily, and the red light of "anger" burst out from the prosthetic eye [this is the emotional expression mechanism built into the prosthetic eye]

Communication disorders.

This time, Tiehua is not a dense mass as usual, but is scattered over a vast area, so it cannot perfectly isolate all electromagnetic wave-based communication and active detection as normal. In this situation, communication is still available from time to time, and active detection is only easy to detect false targets.

In addition, because the density of iron bloom is too low, it does not have the ability to cause short circuits instantaneously, let alone ignite.

But for large legions, this can cause serious disruption to the chain of command.

Before Balbo could react further, sporadic gunfire could be heard ahead. There's also a little bit of fire.

"It's late...... Balbo turned to the technical officer, "When did you find out about this?" ”

"If there is a communication blockage ahead, it was reported ten minutes ago. It's just that the technical class was investigating other content at that time. The technical officer said, "Since we triggered an EMP mine half an hour ago, some people suspect that maybe that aspect is going on." However, I found that the range of this communication obstacle showed a tendency to spread, and the diffusion speed was positively correlated with the wind speed, so I made an electromagnet and tried it. ”

Balbo nodded, "You're doing a good job. The commendation order has been uploaded to the internal system of the Gene Bank Armament. Soldier, you can get better treatment when you go back. Forward the information to me. ”

"Yes!" The technical officer was overjoyed and immediately turned up his previous statistics.

Balbo looked at the extent of the communication impediment and the data that followed, and as soon as he thought about it, he downloaded more accurate data from various nearby weather monitoring stations and weather satellites in the sky. It's just that this download speed is very unstable, jumping between a few hundred bits and a few gigabytes at any time.

"The range is huge." Balbo pondered: "If you want to reach a density that can cause communication barriers, but ensure that it is not visible to the naked eye, it will take dozens of tons of iron. ”

"Dozens of tons...... How is this possible? Ordinary Jianghu people only bring a few groups, and they can't weigh a hundred kilograms. The conventional reserve of green forest cottages is only a few tons at most. And that's a long-term reserve for hundreds of people. ”

"What the hell is going on up ahead?"

The object of the most suspicion should be the target they tracked, the knight who assassinated His Excellency, the deputy head of the Knights of Mana. He should be one of the few people who will consciously spread the iron flower.

However, this is slightly hard to believe.

"Wide-area low-density iron bloom" is actually a very old tactic. But the problem with this tactic is that it's just too old.

This tactic was born before the Battle of Ascension. At that time, the global logistics system, financial system and information network were highly integrated. An experienced hacker can hide himself and parasitize in this vast system, stealing resources endlessly, weakening enemies and strengthening himself.

And now, the difficulty of doing so has been increased infinitely. The Shelterer's management system has more precautions against chivalry. Most of the knights are also physically cut off from the Protector's logistics system.

Even if a master of internal skills has the ability to hide a batch of goods and send it to the wrong area, there is no way to really receive it. All the nodes of the logistics system, the large warehouses, are under the management of senior cadres of the Gene Bank Armed Forces, and most of them are housed in the interior of the mega buildings.

Even if there is really a batch of resources in the corner of the warehouse that have been erased from the past and future by the masters of the inner family, the knights will not be able to get them.

"Preparing dozens of tons of iron bloom" was not so difficult for knights in the past, but now it is not so simple.

"There may be a green forest village in front of us? After that knight rushed into the Green Forest Village, he destroyed all the green forests, and then took all the metal reserves and energy reserves of the Green Forest Village to produce Tiehua. ”

"If you don't think about the lifespan of the 3D printer, it's really too late to prepare."

The speed at which 3D printers make Tiehua is very fast. A fine powder is sprayed on the bottom plate, shaped by a magnetic field, formed by sound wave interference, and heated instantaneously by laser.

If a green forest village does not consider metal reserves at all, it can indeed produce a lot in a short period of time.

He inquired. There is indeed an area directly in front of it, which is suspected to be the area where the "sandstorm ghost" of the green forest forces is entrenched. There's a good chance their Dazhai is there.

It's a bit of a hassle. The government did not have a plan to clear the "sandstorm ghost" before. So the "range of suspicion" marked on the map is a bit large. Applying for the use of heavenly punishment on such a large area would not only waste ammunition, but also hinder the march of troops.

If the tactics are not handled properly, the real target may be allowed to flee like this.

While he was thinking, a line of fire suddenly rose on the edge of the horizon.

Then, there was a flash of light in the sky, like a little star. Seconds later, a muffled thunder sounded.

"It's ......" Balbo almost scolded: "Who shot out the medium and short-range multiple warhead missile!" This is for fighter jets. ”

…………………………………………………………………………

With the help of the flash, Xiang Mountain saw the surrounding troop divisions clearly.

He tossed out the remaining foil airplanes one by one.

It's really not him who blows. In the early years, he played with a group of friends throwing paper airplanes in the wind tunnel of the Russian Federation, and his understanding of paper airplanes was really not covered.

These foil planes, however, prioritize "flying farther" – after all, this time the environment was different from the one in which there was no sustained updraft caused by the high temperature of the explosion residue. These paper airplanes do not give much thought to the reflection cross-section of the radar.

But this time Xiang Shan was not temporary.

All of the paper airplanes had a spherical object with a bullet reflection surface dragged on the front end, like a tiny glass bead.

This thing is called the "Lomb lens", a spherical, multi-faceted refractive lens that forms two images on either side of the lens that refract each other and magnify infinitely.

To put it simply, this thing can be described as a golden glitter in the eyes of the radar.

In the past, if stealth fighters wanted to participate in air shows, military parades, training and other activities, they had to ensure that they were detected by radar, so that ground crews could plan and manage. However, the problem with many stealth fighters is that their stealth performance is so good that even if they know the route in advance, it is difficult for the radar to lock on.

At such a time, the stealth fighter will be attached to the Lombard lens to amplify its own signal and ensure that it is observed by the radar at one time.

And the paper airplane flew over with this thing, and in the observation of those radars, it was about the same as a medium-sized drone, a small combat vehicle, or a warrior rushing over.

Nature provokes a reaction.

"It looks like the density of troops is really not very high, within acceptable limits. Thanks to those broadcasters. They did something very meaningful. ”

Xiang Shan's mind is always simulating the movement of metal aerosol clumps. He put out the wind direction and wind speed detection instrument that he temporarily sensed, and he had been calculating it for a long time. At the same time, all metal aerosol slow-release bombs were dropped by him. He knows all the initial values.

It's true that long-term accurate simulations can't be done, but short-term simulations can.

"In some areas, aerosol clumps were hit, but no firing was heard. But it stands to reason that the search network will not have such a big flaw. This means that there are troops in this area, and that they have separated the microwave radar from the fire control system. ”

"But not every unit was ordered."

"Possibility one, one of their teams found the aerosol and reported it. Possibility two, the intermediate command system finds the aerosol and then gives the order. ”

"Units that still fired at the aerosol mass after the 'order' point in time were temporarily cut off from the command center. At that point in time, there must have been a large aerosol mass between them and the command center. ”

"So, where is it possible for the command center to be ......"

A large area appeared in Xiang Shan's mind. And these areas are shrinking...... Reduce......

Then, not far in front of the mountain, there was a firefight.

Xiang Shan lowered his body.

Here we go.