Chapter 1322 The target... was split into two?
It should be said that Collinger's estimate of the shipborne radar's detection range in advance was relatively accurate.
The X51A has not been specially designed to be stealthy, but the kiss-cut cone waverider design itself will bring about a certain electromagnetic scattering effect, and after all, it is only a small aircraft with a total length of about 8 meters and a diameter of about 0.7 meters.
For shipborne radar, it is not easy to capture its reflection echo from a distance of nearly 300 kilometers.
After detecting that the B52H completed the throwing action, the Jincheng quickly lost stable target tracking.
"Captain, the target detection effect has begun to deteriorate. Do you need to increase the transmission power?"
Bai Yao, the ship's radar director, turned around and asked Zhang Xudong, who was sitting at the electronic chart table.
As the latest destroyer of the People's Navy, the electronic chart on the Jincheng is much more advanced than that on the Long March 9.
Not only does it have richer target information and a higher refresh frequency, but it also reserves a relatively rich mission interface, which can directly command fleet air defense missions, and even plan operations including ship-based helicopters and even future unmanned combat boats. path.
"Forget it, let's not create unnecessary complications..."
Zhang Xudong looked at the bomber that had begun to descend and was preparing to turn. After thinking for a moment, he still shook his head:
“When the number of accumulated echoes is insufficient, simply enhancing the transmission power has limited effect, and it will also expose many unnecessary signal features... Maintaining the current quasi-continuous wave working method and capturing target information is not our task this time. ”
According to the radar echo coherent accumulation theory, after N target echoes are coherently accumulated, the signal power will increase to N times the square, while the average noise power will only increase to N times of the original.
Therefore, if you want to use power to make up for the lack of echo accumulation level, you not only need an exponential level of emission intensity, but also bring a greater noise floor. Even if the background of the current target is a relatively clean high-altitude environment, there is a high probability that it cannot be obtained. desired effect.
On the contrary, it will make the other party’s passive detection equipment cheaper——
Although with the increase in the number of ships equipped with 346 series radars and the increasing number of direct confrontations between the two navies, it is only a matter of time before the radar characteristics are recorded, but it is always a day later.
"I don’t know what the situation is like on the Long March 9th side..."
Political commissar Lu Yuanjie paced back and forth behind the radar console, rarely showing some anxiety.
Due to the working characteristics of submarines, most of the submarine cooperative training they have conducted on weekdays is to allow the other party to use their own cover to pass through sensitive waters, which does not include combat content. Even if it is slightly more complicated, it is just using the surface of the water. The fleet forces the imaginary enemy into a pre-planned submarine ambush zone.
Such complex coordination as today was only practiced once before setting sail.
Since it was the first test at that time, a helicopter was arranged as a communication relay so that both sides could obtain the other's work data in real time.
Now, in order to ensure concealment, the Long March 9 must be strictly in a state of electromagnetic silence, so they know nothing about the situation hundreds of kilometers away.
It is not even possible to determine whether the other party has completed the most basic signal interception.
"Wait...it will be clear after we meet..."
While talking, Zhang Xudong adjusted the background scale on the electronic chart.
At their current location, when zoomed to the minimum, they can just include the coastline of the west coast of the United States.
Before setting sail last month, he specifically asked the head of the fleet whether after the mission was completed, the fleet would need to continue to conduct ocean training in other subjects to accumulate experience and data for similar missions in the future.
In fact, it is a hint whether we can go to a location further east.
But the superior was a superior after all, and he could see through his true inner thoughts at a glance.
Then he made it clear that he would rendezvous with the submarine and return home immediately after the mission was over.
"It seems that I can only leave it to future comrades..."
Zhang Xudong sighed with some regret in his heart.
After returning from this trip, he will go to the senior commander training class for further training and will be promoted to deputy commander of the destroyer detachment.
In other words, if nothing unexpected happens, this will be his last time leading a voyage as captain.
Although there are still opportunities for higher-level leaders to serve as fleet commanders, within the naval tradition, this is a completely different concept.
After some emo, Zhang Xudong decided to change his mind and think of something happy.
He glanced at the US destroyer in the distance through the monitor again:
"By the way, notify the signal department and ask them not to just wait for the lights on the other side to light up. Remember to take a few more photos and send them to the Fleet Publicity Office after you return, so that they can criticize the Americans for obstructing our free navigation. …”
……
Compared with the relatively relaxed atmosphere on the surface ship, the command module of the Long March 9 seemed much more tense.
After confirming that the X51A has successfully ignited, they need to adjust the antenna angle, observe and record the movement of the aircraft body, and wait for the booster to fall off to predict its splashdown location.
Then decide whether to use the submarine itself or control the wire to guide the UUV, and see if you can catch something useful. At the end of the day, we can take some water samples and analyze them later to criticize the Americans for polluting the marine environment through testing.
It doesn't seem complicated to say, but for this temporary submarine radar department, dual-thread work is already quite extreme.
At this time, on the electronic chart, the speed value in the target information column had reached an astonishing [3320].
"This is really him... really fast..."
Han Xiangjie took a deep breath, his eyes could not help but straighten, and he almost even cursed subconsciously:
"I never thought in my life that one day I would see four digits in this place..."
Limited by its large size and the towering turtle back at the back, the Long March 9 is not known for its speed.
But even the relatively fast attack nuclear submarines Long March 7 and Long March 8 have a maximum speed of only about 33-35 knots.
This 3320 knots is almost 100 times their size...
It was completely beyond the scope of his understanding as a submarine officer.
In short, even against the background of the smallest scale chart, the target trajectory still extends forward at a speed visible to the naked eye.
When he first boarded the Long March 9, Han Xiangjie complained that the scale, which could almost be used as a world map, was meaningless.
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As a result, I discovered today that I am short-sighted after all...
After all, Fan Zhaohui has been engaged in technology for so many years. Although it is marine equipment technology, he is still well-informed:
"Look, this is still the boosting stage... After the scramjet engine is started later, if the test proceeds normally, it will probably reach the same level..."
Although in some cases, aircraft will use "knots" as the unit of speed, such exaggerated values are rarely seen.
So much so that Fan Zhaohui needed to do a special conversion before saying it:
"Almost 4,000 knots."
Han Xiangjie didn't reply, but his thumb resting on the edge of the table trembled obviously.
At this moment, the target detected by the radar suddenly split into two parts, one large and one small.
The larger part began to fall soon after separation, while the smaller part continued to fly on its original route.
"This..."
For a moment, Han Xiangjie thought the other party had failed the test.
But almost at the same time, the voice of Xue Shijun, the person in charge of the radar, came from the communicator inside the boat:
"Report, it is detected that the target booster has fallen off. According to the current trajectory prediction, it will fall roughly in our 25th direction, 40 nautical miles away!"
Han Xiangjie had no choice but to suppress the smile that was about to show.
"Compared to the flying body, the shape of the booster is more conducive to reflecting electromagnetic waves."
Fan Zhaohui next to him explained to Han Xiangjie:
"So in the eyes of radar, the smaller boost section is more obvious..."
Han Xiangjie was a little lucky that he had not been exposed just now, otherwise he would have been very embarrassed.
"I know..."
He slightly concealed his embarrassment, and then immediately changed the subject:
"Do you want your people to get on the deck immediately and get the UUV into the sea?"
Normally, when underwater, the UUV can rely on power to break away from the mothership, but now that the Long March 9 is floating on the sea, it naturally needs people to release it.
Operating unmanned aerial vehicles is the job of the navigation department, so everyone's attention has shifted from the electronic chart table to the operation panel next to it.
Several other people changed into life jackets and climbed up the ladder behind the command module, preparing to leave the submarine enclosure.
All this fussing took about two or three minutes.
For a submarine, opening the hatch and going onto the deck is a big deal, requiring the captain Han Xiangjie to personally issue the order.
Therefore, he returned to the chart table and prepared to pick up the communicator.
So I saw it just right——
The flying object, which had already had a weak signal, was once again split into two, turning into two targets with extremely high echo intensity...
"Old Fan."
Han Xiangjie's hand stopped in mid-air:
"This X51A...has a second booster?"
(End of chapter)