The military-industrial scientific research system of the academic master

Chapter 1322 The target... is split into two?

It should be said that Ke Linjie's estimation of the detection distance of the shipborne radar in advance was relatively accurate.

The X51A has not been specially treated for stealth, but the tangent cone waverider design itself will bring a certain electromagnetic scattering effect, and it is only a small-volume 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 reflected echo from nearly 300 kilometers away.

After detecting that the B52H completed the throwing action, the Jincheng quickly lost stable target tracking.

"Captain, the detection effect of the target has begun to deteriorate. Do you need to increase the transmission power?"

The radar director on the ship, Bai Yao, turned around and asked Zhang Xudong, who was sitting in front of the electronic chart table.

As the newest destroyer of the People's Navy, the electronic chart on the Jincheng is much more advanced than that on the Long March 9.

It not only has richer target information and higher refresh rate, but also has relatively rich task interfaces reserved, which can directly command fleet air defense tasks, and even plan the action path of ship-borne helicopters and even future unmanned combat boats.

"Forget it, let's not make trouble..."

Zhang Xudong looked at the bomber that had begun to descend and was about to turn, and shook his head after thinking for a moment:

"In the case of insufficient echo accumulation, the effect of simply increasing the transmission power is limited, and it will also expose many unnecessary signal characteristics... Maintaining the current quasi-continuous wave working mode, 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, and the average noise power will only increase to N times the original.

Therefore, in order to make up for the lack of echo accumulation level through power, not only an exponential level of transmission intensity is required, but also a greater background noise will be brought. Even if the background of the current target is a relatively clean high-altitude environment, it is highly likely that the desired effect cannot be obtained.

Instead, it will be a waste of the opponent's passive detection equipment--

Although with the increase in the number of ships equipped with 346 series radars and the increasing 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 9..."

Political Commissar Lu Yuanjie paced back and forth behind the radar operating table, showing a rare anxiety.

Due to the working characteristics of submarines, most of the submarine coordination training they have conducted on weekdays is to let the other party use their own cover to pass through sensitive waters, which does not include combat content. Even if it is a little more complicated, it is just to use the surface fleet to force the imaginary enemy into the pre-planned submarine ambush area.

Such complex coordination as today was only practiced once before sailing.

At that time, because it was the first test, a helicopter was arranged as a communication relay so that both sides could obtain the other party's working data in real time.

Now, in order to ensure concealment, the Long March 9 must be strictly in an electromagnetic silent state, so they know nothing about the situation hundreds of kilometers away.

It is even impossible to determine whether the other party has completed the most basic signal interception.

"Wait... it will be clear after the reunion..."

While speaking, Zhang Xudong adjusted the background scale on the electronic chart.

At their current location, when zoomed to the minimum, the coastline of the west coast of the United States can be included.

Before sailing last month, he specifically asked the fleet leader whether the fleet needed to continue to carry out other subjects of ocean training after the mission was completed to accumulate experience and data for similar missions in the future.

In fact, it was a hint whether it could go to a more easterly position.

However, the superior is the superior after all, and he saw through his true thoughts at a glance.

Then he made it clear that he would reunite with the submarine and return home immediately after the mission was completed.

"It seems that it will only be left 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 studies and be promoted to deputy commander of the destroyer detachment.

In other words, if nothing unexpected happens, this will be his last time to lead a team as a captain.

Although higher-level leaders still have the opportunity to serve as fleet commanders, this is a completely different concept in the navy's tradition.

After some emo, Zhang Xudong decided to change his mind and think of something happy.

He once again looked at the US destroyer in the distance through the monitor:

"By the way, notify the signal department and tell them not to just wait for the other side to signal, but also remember to take a few more photos, and send them to the fleet propaganda department after returning, so that they can criticize the Americans for obstructing our free navigation..."

...

Compared to the relatively relaxed atmosphere on the surface ship, the command cabin of the Long March 9 is much more tense.

After confirming that the X51A has been 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 and predict its splashdown position.

Then decide whether to go to the submarine body or control the wire-guided UUV to see if they can get 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 figures 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 number...

It was completely beyond 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 be almost the same..."

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 a flying body, the shape of the booster is more conducive to reflecting electromagnetic waves."

Fan Zhaohui next to him explained to Han Xiangjie while planning the UUV's navigation route:

"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 strong echoes...

"Lao Fan."

Han Xiangjie's hand stopped in mid-air:

"This X51A...has a second booster?"