Chapter 1100 Ideas for Countering UAVs
In just a few minutes when Zhu Xuejun was lost in thought, the target track on the display had changed significantly.
“Report!”
The operator noticed that neither leader was looking in the direction of the console, so he reported loudly:
“The target suddenly turned to the west. Staying away from border airspace! ”
Fan Rongjian and Zhu Xuejun both looked happy when they heard this and quickly sat back in front of the command podium.
Then it was discovered that, as expected, the high-altitude target that was difficult to handle actually turned and lowered its flying altitude, apparently preparing to quickly leave the detection range.
“You were...scared away by us?”
The former wiped the sweat from his forehead and showed a somewhat surprised expression.
“A battlefield surveillance radar alone cannot exert such a great deterrent effect...”
Zhu Xuejun didn't really want to understand the situation at this moment, but he still waved his hand and replied:
"The sudden departure of the other party means that either the reconnaissance goal has been achieved, or the reconnaissance goal has been out of range..."< br>
Fan Rongjian was obviously a lot more relaxed:
“That means... we are not a reconnaissance target?”
So far, they have only turned on one 64N6E radar, and the long-range The signal value of the warning radar is not high, at least it is not worth going to war and taking off a strategic reconnaissance aircraft for detection.
"Probably..."
In fact, at this moment, Zhu Xuejun already had some guesses in his mind, that is, the somewhat nonsensical flight of the Americans might be related to the manned space mission.
The reason why they are rushing to evacuate is to avoid the return path of the spacecraft -
After all, everyone has conflicts, but they are all okay in terms of face.
Even Americans are unwilling to take risks on security issues.
But since his superiors didn't explain it clearly, he had no choice but to keep his conjecture in his mind and ordered Fan Rongjian:
"No matter what, report the situation quickly..."
On the other side .
Dongfeng Aerospace City also received a situation report from the Jincheng Military Region about twenty minutes later——
After all, we are not in the same system, and the chain of command of the People's Liberation Army itself will not be the same. Very smooth, so the reaction speed is not that fast.
"Report to the commander-in-chief that the target suspected of being a large reconnaissance drone has left the dangerous airspace to the west."
Although Chang Haonan said before that the other party should not be able to detect any important information, but it really At this time, everyone could not help but breathe a sigh of relief.
"It seems that the Americans have returned in vain this time..."
The commander-in-chief slowly sat back on the command seat, with some relief in his tone.
“That’s not entirely true...”
Shen Junrong denied it on the surface, but the raised corners of his mouth showed that he was just joking:
"The spacecraft had to change orbit in the last lap to prepare for return. The control and feedback signals between Shule Station and the spacecraft , they should still be able to catch it..."
After finishing speaking, several people next to him laughed.
After all, measurement and control signals are almost completely open to the public.
It is equivalent to Americans putting in a lot of effort, only to get information that can be obtained by making a phone call.
No matter how you look at it, it’s not a loss.
In fact, according to the original plan, the Shule Measurement and Control Station does need to shoulder a large part of the communication tasks in addition to the measurement and control signals.
But thanks to the work of the Qingluan satellite cluster, this part of the function can be temporarily transferred to Haojing.
And that place is naturally beyond the detection range.
However, the relaxing time is always short-lived.
For most people here, it is far from time to really feel relieved -
It is already a quarter past four in Beijing time, and there is only more than a month left before the landing time of Shenzhou 5. Hour.
Therefore, after confirming that the emergency situation would not pose a threat to the spacecraft's re-entry into the atmosphere, everyone returned to work one after another.
After a while, Shen Junrong suddenly came to Chang Haonan again:
“Comrade Haonan, do you think in this situation, can we mislead the target by interfering with the satellite positioning system? routes to counter this type of reconnaissance? ”
"Ah?" Chang Haonan was immediately excited after hearing this.
This idea can easily be connected with his operation in the Balkans four years ago.
However, Shen Junrong had already left the Science and Industry Committee at that time, and logically he should not know the details of that matter.
However, the latter just thought that Chang Haonan had not turned around, and immediately explained:
"The Jincheng Military Region later added a more detailed description of the situation, and mentioned this idea at the end of the report."
Until this moment, Chang Haonan noticed that Shen Junrong was holding a copy of A thicker report than before.
Then he breathed a sigh of relief:
"In principle it is possible...but it is very difficult."
"First of all, the GPS positioning system is currently being updated to the third generation. The encryption level of the military code is several levels higher than that of the previous generation... If it is just purely suppressive interference, it may still be possible to achieve it relying on the power advantage of ground equipment, but you said it is misleading..."
He shook his head:
“Either we can directly obtain the relevant parameters in some way, or we must make a huge breakthrough at the deciphering level...including algorithms and computing equipment, otherwise it will be difficult to achieve. . ”
The fact that he was able to direct that shocking accidental bombing four years ago was an extremely unlikely event due to many coincidences.
It is impossible to hope for a repeat.
Moreover, even back then, it was thanks to the interference targets being a few aerial bombs.
As a low-cost disposable product, JDAM saves money wherever possible.
Even if the opponent switches to Tomahawk cruise missiles, it is impossible to achieve such perfect results.
And drones are still drones with a unit price of hundreds of millions of dollars...
It is impossible to have only one trajectory planning mode.
According to the experience of later generations, even if a drone like the Global Hawk is suppressed and interfered with by a completely irresistible force, it can still return on its original path through the built-in inertial navigator, or at least fly out of the interfered area. .
Furthermore, drones are also controlled by humans.
If there is a serious deviation in the navigation signal, the pilot can still become the last safety barrier.
Shen Junrong continued while flipping through the report in his hand:
"The concern of the frontline troops is that passive reconnaissance like today is not bad. At worst, they can counterattack by entering a silent state, but If the other party is wandering outside the border and using synthetic aperture radar or other means to conduct active reconnaissance of our sensitive areas, then we seem to have no suitable response methods. After all, the other party has not crossed the border, so it is impossible to actually open fire, right? "
For a while, Chang Haonan didn’t know how to answer.
In fact, the most direct way is to build a similar drone yourself and run around the opposite side.
If you disgust me, don’t blame me for disgusting you.
But let’s not talk about the problem of the aircraft itself.
To allow drones to fly remotely requires a complete communications satellite system.
Otherwise, you can only wander around within a few hundred kilometers of the control station.
China obviously does not have this system yet.
Otherwise, there would be no need for him to bother with the Qingluan constellation.
“Although it is a bit difficult to counter UAVs, synthetic aperture radar... can actually be dealt with.”
After some thought, Chang Haonan replied:
"In principle, most SAR imaging uses linear frequency modulation signals, so using digital radio frequency storage technology similar to our air-dry series pods, frequency-shifting modulation interference or micro-motion modulation interference can be achieved."
< br>
"Although the success rate of this type of interference is not 100%, it can be targeted at precise ranges and precise targets, and will not affect other own or third-party equipment in the interference area like large-scale noise interference."
"Of course, at the technical level, it still takes time to develop..."
This method is actually still a passive response.
Just like air defense.
The effect is definitely there, but if you only defend without attacking, it will only be a matter of time before the attack is broken.
Therefore, Chang Haonan was still thinking about another possibility in his mind -
Not forging navigation signals, but directly forging satellite control signals.
It is equivalent to directly taking over the control of the other party.
In this way, the drone will not trigger the automatic return mode and will not be interfered by the opponent's ground operator.
If it can really be realized, it would be trivial to mislead the route or anything like that.
It's even possible... to capture the target directly!
(End of this chapter)