The military-industrial scientific research system of the academic master

"I……"

Wang Hong, who had not recovered from the shock, left speechless for a moment.

Chang Haonan thought there was something difficult:

"There should be no other problem, right?"

Wang Hong asked him to shake his head repeatedly:

"There is definitely no problem here at the shooting range. I mean... are you going to go so directly?"

This question made Chang Haonan a little confused:

"Otherwise... the superiors specially assigned us a helicopter team. Although the weather conditions are not very good now, the weather forecast will be a sunny day tomorrow morning."

Fortunately, Wang Hongrang also restored his thinking ability and reorganized his language:

"Don't you need to go back to the capital to analyze it in detail? Just take a look at the report..."

He originally wanted to ask, just take a look at it?

But I also feel a little disrespectful to the other person.

However, Chang Haonan still understood the other party's meaning and explained:

"Under normal circumstances, we must check the debug logs specifically, and even set up a passive reception device nearby to analyze the characteristics of the space-based signal within a specific time range... But this time, it was a coincidence that the other party just happened to hit me who was studying. part."

As he said that, he pointed out the direction of the target area No. 3:

"The electromagnetic prism system we are laying has some operating details that match the descriptions in the report, but there are still some details, so I have to give priority to going to the site..."

“…”

Because this decision was really hasty, it was not until the helicopter Chang Haonan was riding took off that Maodao radar station received relevant news through its superiors, saying that a helicopter would land in about 90 minutes and asked them to prepare for reception.

"A leader wants to come?"

Liao Yongcai asked Guo Lin, who was obviously more familiar with the situation, and said:

"The helicopter apron at our radar station has been used twice since its completion. One was the head of the Jincheng Military Region who came to inspect it, and the other was a soldier who fell from the car while repairing the radar and was injured..."

Guo Lin had just taken off his work clothes and was putting a cotton coat on his body:

"The leader is also an expert... In short, it must be solved."

In fact, he had served as the director of the 14th Institute of Electrical Science and Technology two years ago. If nothing unexpected happens, he will be able to hold a leadership position at the group level in two years. His administrative level on the surface is very close to Chang Haonan.

However, the other party not only has the title of academician, but also the value of the position cannot be simply compared.

“Solve the problem…”

Liao Yongcai's movements were frozen in place:

"What's wrong with our analysis yesterday?"

He finally waited for a highlight moment of his own. If he was slapped in the face only one day, it would be a big deal.

"It's hard to say, it's possible that Academician Chang has already thought of a solution..."

Guo Lin took a deep breath, and the expression on his face was a little complicated-

Although he and Chang Haonan have always had business contacts, they have not met in several years.

This time, the two of them happened to be responsible for the spear and shield respectively. They originally wanted to take this opportunity to compete with each other in a distance.

Although the probability of achieving an incoming early warning for the first time is not high, according to Guo Lin’s previous idea, he should be able to pass a few moves.

As a result, now, he needs the support of his opponent...

It is equivalent to the end of the contest before it even started.

Fortunately, Guo Lin did not know Chang Haonan on the first day, and it would not affect the serious business for personal victory or defeat. So he quickly accepted the reality and began to direct the staff of the control center to organize the information so that the other party can Work can be carried out as soon as possible after being in place.

...

"In fact, there is nothing wrong with your analysis direction, but it just underestimates the degree of decisiveness of the enemy's attack..."

Two hours later, Chang Haonan sat in front of the radar console and answered the question that Liao Yongcai couldn't help but ask:

"It can be seen from polarization data analysis that during the third system-wide diagnosis, the side lobe inhibition rate of Array 3 decreased by about 12 decibels."

His fingers swiped over the knob of the spectrum analyzer. The 1.14GHz band depression looked like a cut-cut wound. The central air conditioner of the Maodao radar station emitted a low buzz, but it could not suppress the Didi alarms that were running the simulator one after another. Voice:

"Last night, I asked the Beijing Aerospace Measurement and Control Center to superimpose the orbital parameters of several military satellites onto the electromagnetic environment map, you can see."

Following the direction of Chang Haonan's finger, the crowd came to the front of the monitor:

"UTC time is 0400 to 0430, there are three suspicious satellites overhead, among which the experimental satellite numbered STP-4D has a overlap rate of more than 76% with the fault period. Although this number is not high, if the satellite transmitting antenna is considered, it may have The gaze function is enough to interfere with you."

Traditional satellite-borne equipment is fixed on a satellite platform, and the posture of the satellite body needs to be adjusted to change its direction.

Satellites with gaze function have an additional device similar to a gimbal, which can ensure that the equipment points to the same position on the earth's surface during the satellite movement, so as to reduce the working time of the on-site engine and extend the satellite's life.

“STP-4D…”

Guo Lin searched in his memory and did not find much relevant information.

"A standardized satellite platform developed under the Pentagon's 'Space Test Program' is used to verify some cutting-edge technologies."

Chang Haonan explained:

"Specific to this STP4D, on the surface, it is used to test the new generation of Hall electric propulsion equipment, but the frequency of orbit change after launch is not high, and it is obvious that there are other undisclosed functions."

Just like the operation of naming reconnaissance satellites "resources" and "oceans" here in China, each major country will launch some spacecraft with mysterious purposes, and basically can only rely on guessing before collecting enough characteristic information.

And this STP4D is obviously also a part of the opponent's advance layout.

Now it is estimated that some clues have been detected, so this hidden stake has been activated.

"The operations on the surface are very routine, like here, using Doppler frequency shift to compensate for orbital motion errors, which is a very common technology."

Chang Haonan explained while circling the subtle fluctuations on the spectrum, and the waveform after amplification showed a jagged feature:

"But in fact, conventional DRFM signals do not have such efficient adaptive characteristics. The waveform replication speed in this set of characteristic signals is three orders of magnitude faster than the usual demand, so it is aimed at us."

Liao Yongcai is still digesting and absorbing the huge amount of information in the previous conversation, but Guo Lin has figured out most of the joints.

Except for the reason.

"But... why?"

He leaned in front of the screen, as if he wanted to put his eyes into it:

"Just to hinder our radar debugging process for a few days... no more than half a month at most?"

"That's impossible."

Chang Haonan waved his hand and suddenly asked back:

"Have you ever thought about why there were no problems with the tests of arrays 1 and 2?"

Guo Lin certainly thought about this question, but because the interference itself was not continuous, he only thought it was a coincidence at the time.

But now looking back with the conclusion, it may not be that simple.

Chang Haonan gave the answer directly without waiting for Guo Lin to reply:

"Array 3 is too close to the common mode choke, and the characteristics of the side-by-side configuration itself lead to an enhanced near-field coupling effect... In this way, if we eliminate the interference and complete the debugging in the conventional way, there will be no abnormality in normal work, but as long as the other party increases the interference level, there will be a defect that can be exploited by the other party."

Guo Lin's eyes widened slightly.

I thought the Americans would play dirty, but I didn't think they would play so dirty.

Fortunately, after being prepared, it is not difficult to solve the problem:

"The FPGA board we upgraded last year supports real-time polarization agility and dynamic partial reconfiguration. We only need to re-burn the beam control algorithm, consider the ionospheric Faraday rotation effect, and add polarization compensation coefficients..."

"..."

After initially finalizing the solution, Guo Lin and a group of technicians quickly got to work.

Chang Haonan suddenly turned his head and looked at Liao Yongcai, who seemed to have not yet fully reacted:

"Director Liao, the interference that the 7010 radar suffered 25 years ago was probably not from a radar reconnaissance satellite as you guessed..."