Chapter 388 GPS interference, we can do it too!

When Cao Gangchun said this, Chang Haonan happened to read the specific incident feedback from the Hubei Province newspaper.

This kind of thing, you know who is behind it without even thinking about it.

Although there is no evidence, there is no need for evidence.

No matter where in the world, whenever something bad happens, the first country that everyone thinks of subconsciously is always the same country.

It was already obvious who the problem was.

It can’t be that the whole world is wrong, right?

Besides, there is still the Galaxy incident ahead.

"We caused the Americans such a big loss this year in the Boeing-McDonnell Douglas merger. It's not surprising that they are so angry now that they are coming back with some dirty tricks."

Although Ding Gaoheng, who was sitting next to him, spoke with disdain, his tone was indeed quite dignified.

After all, given China's current comprehensive national strength, it is indeed difficult to achieve anything big in a short period of time in a place like the space field where money is burned like crazy.

Shortcomings in remote communication can be made up for in other ways, but navigation and positioning are indeed inseparable from satellites.

Although the independently developed satellite navigation system "Beidou" has been approved, it is not expected to be completed until the new century.

And the constellation itself, which consists of only three satellites, also has a very strong experimental meaning.

As for the communication satellite cluster, the investment required is even more exaggerated...

In short, it seems that there are no countermeasures available at the moment.

Cao Gangchun, who knew all this in his heart, could only sigh:

"Sigh... I still have to write down this account. If I don't count it now, I will have to settle it sooner or later!"

"Is this..."

Chang Haonan put the report in his hand on the table next to him:

"Although it is indeed impossible for us to come up with a comprehensive replacement for US satellite services within a few years, if we just want to give the other party a peer threat, there should still be hope."

Ding Gaoheng had long been used to it, and he just looked over with a little curiosity in his eyes.

Comrade Chang Haonan has always been relatively good at opening up ideas.

But Cao Gangchun, who had just been transferred from the position of deputy chief of staff, was still relatively unfamiliar with this situation. He immediately sat upright, leaning on the back of the chair:

"Is there any way to replace GPS without using satellites?"

After the disintegration of the Soviet Union, although Russia still built the GLONASS system consisting of 1993 satellites from 1995 to 24, due to the short lifespan of the satellites and lack of maintenance, by the late 90s, some satellites had begun to expire. It became increasingly difficult to maintain navigation services around the world.

More importantly, due to the lack of commercialization model, they do not provide civilian services outside the CIS.

At present, most domestic applications of satellite positioning systems are for civilian needs.

So GPS is now a completely monopoly business.

"It's still a bit difficult to replace GPS..."

Chang Haonan replied:

"I mean, if they can mess with satellite signals, so can we."

Cao Gangchun, who felt a little unsure, subconsciously looked at Ding Gaoheng next to him, only to find that the latter was sitting on the sofa, looking like an old god.

This time, it seemed that he was a little surprised just now.

So Cao Gangchun took a deep breath and leaned back on the backrest, making himself appear almost as usual:

"But we don't control the operation of GPS satellites like the Americans, so how can we do anything about it?"

After about half a second, he guessed again in an uncertain tone:

"I've heard that as long as a computer is connected to the Internet, it may be controlled by others. Are you going to use this method?"

After all, he is the leader of the General Armament Department. At present, the army has begun the construction of an intranet that is physically isolated from the outside Internet, so he knows a little bit about this aspect.

It's just that it has nothing to do with Chang Haonan's actual thoughts.

"That's not it."

Upon hearing such outrageous speculation, Chang Haonan quickly waved his hand:

"Even if they can invade NASA's network, I'm afraid they won't be able to directly control the satellites beyond the other party's authority. If that doesn't work, they can cut off the Internet... I'm talking about another method."

"The way GPS positioning works is that the satellite sends undifferentiated broadcasts to an area. The ground terminal is completely passive. After receiving the satellite signal, the terminal itself performs coordinate calculation."

"The advantage of this is that the positioning terminal does not need to send any signals and can ensure radio silence. There is no need to worry about exposing the target during the positioning process, and there is no need to rely too much on the ground station. But after all, it is one-way communication and there is no problem of interrogating signals, and the terminal itself The performance and robustness are very poor, so there are inherent shortcomings in anti-interference and anti-spoofing capabilities.”

This time, Ding Gaoheng, who had been unresponsive just now, reacted almost immediately.

After all, he has a background in aerospace, and he even happens to be an expert in navigation systems.

"You mean that we can send the positioning terminal a signal in the same frequency band as the GPS satellite, thereby interfering with its information interpretation and finally generating an incorrect position data?"

Chang Haonan nodded:

"Yes, in theory, this principle is similar to forwarding jamming, except that it eliminates the step of the jammer receiving and deciphering the signal. It should be essentially similar to the jamming pod we previously developed for the JH-7, but Because the performance of the GPS terminal is weaker than that of the radar terminal of the fighter jet, and it does not involve the issue of frequency agility, it is much less difficult."

It's really easy to talk to an expert, it only takes a little bit of effort to get through.

"This principle should be no problem, but Xiao Chang, modern satellite signal receiving antennas are generally directional and will only receive signals from above. Does our jammer... also need to be installed on an airplane? "

Although Ding Gaoheng is no longer on the front line of scientific research, he still understands the basic situation of technological development.

"Yes, yes, and if the Americans do this, they can use excuses such as satellite malfunctions to get over it. We don't do their bullying thing. We certainly can't target third parties. We can't let planes fly to the mainland of the United States. Are you going to interfere?"

Cao Gangchun also said immediately.

"Of course it is possible to put it on the aircraft. When the 601's domestically produced J-11 is developing a self-defense jamming pod, you can consider adding this function, which can increase a lot of efficiency in the process of fighting satellite-guided cruise missiles. "

Chang Haonan first confirmed Ding Gaoheng's idea, and took the cruise missile that our military was most worried about in the late 90s as an imaginary target, instantly changing the issue of GPS interference from "simply regaining face" to "a necessity for military struggle preparations". equipment technology”.

You should know that although the new three attacks and three defenses of "attacking stealth aircraft, attacking cruise missiles, and attacking armed helicopters; preventing precision strikes, preventing electronic jamming, and preventing reconnaissance and surveillance" have not been systematically proposed as a concept, they have been influenced by the previous several times. Due to the impact of local wars, some key units have begun to be organized from top to bottom to conduct relevant combat method testing and training.

In the original timeline, the final design and finalization assessment of the PL-11 missile was to shoot down several YJ-82 target missiles that simulated Tomahawks in the South China Sea.

Therefore, allowing the J-11, which originally had average downward-looking and downward-shooting capabilities, to intercept cruise missiles through soft-kill one-to-many interception will definitely be very attractive to higher-level units.

Of course, this is not Chang Haonan’s ultimate goal.

After all, with the introduction of a series of new small-caliber anti-aircraft guns such as PGZ95 and PG99, the threat of ordinary cruise missiles such as Tomahawk will soon plummet.

"However, as Minister Cao said, the restrictions on the aircraft platform are still greater after all, so we can still consider using the scattering effect of the ionosphere or meteor remnants to allow jammers placed on the ground to obtain signals similar to those of satellites Of course, I may need to study and demonstrate how to operate it specifically when I go back."

Cao Gangchun and Ding Gaoheng looked at each other.

Chang Haonan's idea simultaneously hits the two most critical demands of the People's Liberation Army today: combating cruise missiles and preventing precision strikes.

The ground-side jammer can be placed at key locations such as command headquarters or core positions to interfere with the enemy's satellite-guided weapons at the very end, causing them to deviate from the target.

"Well...if it can be done, it will definitely be a huge improvement for our army's ability to resist foreign enemy interference in the new era."

Cao Gangchun, who was in charge of the equipment, immediately affirmed.

Although his statement cannot be used as the final decision, it is obviously still quite weighty.

"But the two leaders, this matter cannot be urgent for the time being. We need the Americans to cooperate with us."

Chang Haonan rubbed his hands gently.

"How to say?"

Ding Gaoheng showed a smile.

He knew that whenever the other party made such expressions and actions, he was coming up with some evil idea.

"Given the current situation in which Americans do not take any country in the world seriously, they will definitely not be able to continue in an honest manner. I am afraid that within a few years, they will have to find excuses to fight a new war."

"Normally we cannot just go to other people's homes and cause disturbance, but if a local conflict breaks out, the situation will be completely different."

"In the final analysis, the electronic jammer is still a soft-kill defensive device. It can be smuggled in under the name of humanitarian relief supplies or similar, and catch the opponent by surprise!"