Chapter 435: All methods are effective, misunderstandings are wonderful
"Okay! Then get on the plane! Two people from each of your two units, no more! Comrades, thank you!"
In the envious eyes of others in the Institute of Guidance and Research and the Institute of Electromagnetics, their leaders each took one person and boarded the Tu-4 modified special aircraft together with the crew.
The ground crew members had already made all preparations before the plane took off while people were gathering. From the time the order was received to the time the plane started taxiing, it did not take more than thirty minutes.
The huge Tu-4 taxied on the runway and reached the take-off position.
After a series of preparatory actions, the tower issued a takeoff clearance, the aircraft's throttle valve was pushed to the maximum, and all wings were turned to the takeoff configuration. Under the control of the Tu-4 crew, the behemoth began to accelerate and taxi on the runway. , finally took off at the end of the runway and flew into the night sky.
“The owl has attacked!”
Aren’t you a mouse? Hey, I’m an owl.
"The bird's nest has been received. The rat last appeared in the XXX airspace southwest of Songjiang. Please rush to the YYY airspace ahead to intercept."
Through the airspace where the P-2V was last spotted, This further confirmed the speculation that the enemy's target was the Songjiang area. No matter how the enemy flew, basically the designated airspace could not be bypassed. The closer it got to Songjiang, the fewer routes it could choose to complete its mission.
As for whether the Tu-4 can detect or even intercept enemy aircraft, it depends on the situation. This can also be regarded as a test of its modification effect.
Jianning is not far from Songjiang. Although the speed of Tu-4 is not as fast as that of fighter jets, it is still far beyond that of P-2V. It quickly reached the designated airspace.
"Owl, the mouse just appeared in the YYY airspace, bearing XX, distance XX kilometers."
"Owl understands."
Under ground guidance, the Figure-4 special The flight altitude is 1000 meters and flies towards the designated direction.
The guidance on the ground is not imprecise, but whether the P-2V can be found is a matter of uncertainty. In the past, there were many situations where the fighter jets and the P-2V were close at hand but the enemy was not discovered.
In the sky at this time, there was no cloud barrier between this height and the ground. Tu-4 turned on the radar and searched the air and the ground.
The radar operator of the Institute of Electromagnetics, together with the radar operator of the crew, stared at the screen with all their concentration, not missing every trace on the screen.
In the P-2V, Major Zhou believed most of the captain's words. Although the journey was quite bumpy due to the ground effect, updrafts and various maneuvers of low-altitude flight, the opponent he was most worried about was No electronic interference has ever been discovered, not even once.
Okay, okay, the other side can't track me anymore.
Seeing that the mission area was not far ahead, Major Zhou felt relieved. It seemed that the aircraft that was shot down last time was indeed an accident.
The members of their electric team are now making final preparations before the mission, and the atmosphere on the plane is relaxed.
"Didi. Didi."
The sudden alarm sound broke their mood. The people in the Den Sentai team knew that this meant that they were being continuously tracked by radar.
Although their mood was ruined, they did not panic. Although they were enemies, they had to admit that they were indeed well-trained.
The fact that needs to be acknowledged is that among the military forces that are strongly supported by the Citigroup, although the Transportation Brigade has been ridiculed by us for a long time, in fact, they are already the most capable among these forces.
The reason why they ended up like that was not because they didn't work hard, but because they had the world's top combat power and command, as well as a sea of supporters.
"Lower altitude and turn on interference." Although no trace of the opponent was found, Major Zhou immediately issued the order.
As the mission was about to begin, the P-2V also began to climb to a certain height. The advantage of flying low was that others could not see it, but the disadvantage was that it could not see others either.
According to past experience, once these two actions are performed, there is a high probability that the other party will lose the signal, and then they will have sufficient space and time to get rid of each other.
However, things are a little different this time.
In the air, dozens of kilometers away from the P-2V, the atmosphere above the Tu-4 was tense and warm.
"Low-altitude target found, speed xxx kilometers per hour, bearing xx, distance 30 kilometers."
There are not so many air targets these days, this airspace has long been cleared, except for those who are rushing to cooperate There is no other target than the fighter jets in combat.
Judging from the flight height and speed, this target is most likely the mouse we want to catch this time.
"Watch it, watch it."
The captain shouted, turning on the encrypted radio to shout to the command center: "Bird's nest, bird's nest, owl found mouse, bearing."
The command center's When people heard this, they burst into applause, which at least proved one thing: the idea of having radars in the sky was effective.
Although it is still dozens of kilometers away, there is hope as long as we keep an eye on it.
“Owl, keep an eye on the mouse, two falcons are coming, there are still ten streets to go.” The comrade in the command center shouted to the Tu-4 while calling two fighter jets 100 kilometers away for support. .
“The owl understands.”
At this time, the P-2V has completed the altitude descent. According to past experience, their signal will be drowned in ground clutter at this time. At the same time, electronic interference will also blind the eyes of the other person.
On the Tu-4 Special, the radar operator reported: "The enemy aircraft signal disappeared."
The captain quickly adjusted the flying posture: "Ascending altitude to 3 kilometers."
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The head of the Electromagnetic Institute also issued an order: "Increase the transmission power and turn on the clutter filtering."
Standing high will help you see farther. Increased altitude is helpful for discovering the enemy, but in theory, you can see it. Failure to handle ground clutter is another matter.
In fact, there is no algorithm for distinguishing target signals from ground clutter, but whether this algorithm can be used is a practical problem. Previous radars were useless.
Since DJS-60DJ began to be widely promoted in the equipment industry, the comrades of the Institute of Electromagnetics finally have some hope of solving this problem.
DJS-60DJ is not very fast, nor is it prepared for signal processing, but it does work anyway.
Comrades from the Institute of Electromagnetics tried their best to split the radar echo signals into multiple DJS-60DJs for calculation, and finally combined the results.
The good news is that it can really filter out ground clutter.
The bad news is it's a bit slow, the results lag behind the signal and are not continuous.
So under normal circumstances, clutter filtering will not be performed.
But don’t worry about it being slow or not, you can still see it.
A target highlight began to flash on the radar screen intermittently. The radar operator was very excited about this. The algorithm was working!
The electronic interference of the P-2V did not have much effect, because the interference was burned through by the more powerful radar on the Tu-4. This high power was achieved by the Tu-4 bomb bay. The battery inside is enough to support it, so it won't turn on unless necessary.
Relying on this intermittent and occasionally drifting signal, Tu-4te still kept his eyes firmly on the P-2V and flew straight towards the opponent. At the same time, he was also guiding the fighter jet through the command center.
Everyone in the command center is happy. This result shows that high-power radar anti-interference and technical means of filtering clutter through digital signal processing are effective.
As long as these are effective, it won't hurt even if the enemy is only driven away instead of shot down this time, because the magic weapon they rely on for survival has been broken!
At this time, Major Zhou and the captain were already a little worried on the P-2V.
Although their listening antennas can roughly locate the opponent's direction, the belly radar cannot detect the opponent. This seems to be good news, indicating that the opponent is at high altitude, and based on past experience, they can get rid of the opponent.
But this time Haoshi is a little different. The invincible methods in the past seem to have no effect at this time. At least the radar signal is still staring at him.
Of course, maybe it's because the other party's flight direction is facing you, so the radar signal seems to be staring at you. Maybe the other party is just unwilling and still turns on the radar.
In any case, you have to try to deal with it: "Course XX, decrease altitude again."
The other party may be maneuvering based on the heading obtained before the signal was lost, so you might as well try changing the heading yourself. At this time, the mission is left behind. Your life is at stake. You must at least know whether the other party is really watching you. .
On the Tu-4 Special, the radar operator reported the enemy's heading after a delay: "The enemy's heading changed to XX."
The crew immediately changed their heading and aimed again enemy plane.
However, at this time, the enemy plane's target signal disappeared.
The P-2V, which descended again, has reached the extreme low altitude of 50 meters. Any lower than that, it will be difficult for its terrain radar to handle.
However, at this altitude, the Tu-4 was temporarily freed from tracking, not entirely because of ground clutter, but because of the mountains in the mountainous area, which were blocking the radar signal.
"Report, the other party's radar tracking signal has disappeared."
This made Major Zhou and the captain finally breathe a sigh of relief. Sure enough, the other party was based on the clutter and active It is just a blind scan of the heading before the interference takes effect. Once you change the direction, the other party will not be able to find you.
This misunderstanding is quite wonderful. Although whether this misunderstanding occurs or not, it cannot change the fact that they are firmly locked up, but at least before the most worrying thing happens, they can feel better. So desperate.
"The enemy's radar signal has completely disappeared!" Above the Tu-4, the radar operator reported again.
The leader of the Electromagnetic Institute thought for a while and said in a brisk tone: "The enemy should have dropped in altitude again. Don't worry, the enemy cannot fly at that altitude forever. We are not far from the enemy, only more than ten kilometers away."
< br>The captain of the Tu-4T heard his judgment and ordered the Tu-4T to continue flying in the direction where the enemy signal disappeared. The radar was still scanning continuously. The radar has a sector-shaped scanning area to target the enemy's flight. With such speed, it is impossible to fly out of this area, just waiting for it to appear.
50 kilometers away, our fighter jets are coming quickly. Under the wings of the Tu-4, the Thunderbolt-1 is also eager to try.
(End of this chapter)