Chapter 1365 The Ghost of Phase
"I..."
Wang Hong, who had not recovered from his shock, left speechless for a moment.
Chang Haonan thought there was something difficult:
"There should be no other problem?"
Wang Hong made him shake his head repeatedly: "There is definitely no problem here on the shooting range. I mean... are you going to go so directly?"
This question made Chang Haonan a little confused:
> "Other... the superiors specially assigned us a helicopter team. Although the weather conditions are not good now, the weather forecast will be a sunny day tomorrow morning."
Fortunately, Wang Hongrang has also recovered his thinking ability at this time. Reorganized the language:
"Don't you need to go back to the capital to analyze it in detail? Just take a look at the report..."
He wanted to ask, just take a look at it?
But I feel a little disrespectful to the other person.
However, Chang Haonan still understood the other party's meaning and explained: "Under normal circumstances, you must check the debug log specifically, and even set up a passive acceptance device nearby to analyze the specific Characteristics of the space-based signal within the time range... But this time it happened to happen that the other party hit the part I was studying."
As he said that, he pointed out the direction of the target area No. 3: "The electromagnetic prism system we are laying is part of the 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 scene..."
"..."
Because this decision was really hasty, it was not until the helicopter Chang Haonan took off. Previously, the 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.
"Are there any leader going 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 fell from the car while repairing the radar and was injured..."
Guo Lin had just taken off his work clothes and was putting on a cotton coat:
"Leader, also an expert... …Anyway, it must be the problem to solve it.”
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 serve as one at the group level in two years. The administrative level of leadership positions 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:
"What's wrong with our analysis yesterday?"
He finally made it easy When you wait for a highlight moment of your own, if you get slapped in the face after only one day, it will be really a mess.
"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-
Between him and Chang Haonan Although there have been business contacts, I haven't seen each other 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 from his opponent...
It is equivalent to the end of the competition 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 in front of him and began to direct the work of the control center. The personnel organize the information so that the other party can carry out the work as soon as possible after being in place.
…
"In fact, there is nothing wrong with your analysis direction, 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: "Through polarized data analysis, we can see that in the third system-wide diagnosis process In the third array, the side lobe suppression rate dropped by about 12 decibels. "
His fingers slashed over the knob of the spectrum analyzer, and the 1.14GHz band was slumped like a wound that was accurately cut. The central air conditioner of the Dao Radar Station emitted a low buzz, but it could not suppress the Didi alarm sounds that were running the simulator one after another: "Last night, I asked the Beijing Aerospace Measurement and Control Center to superimpose the orbit parameters of several military satellites on the electromagnetic environment map. , look."
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. "
The traditional satellite-borne equipment is fixed on the satellite platform, and the posture of the satellite body needs to be adjusted to change its direction.
Satellites with gaze function have an additional gimbal-like device, which can ensure that the equipment points to the same position on the earth's surface during 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: "In particular, this STP4D is on the surface. The above is used to test the new generation of Hall electric propulsion equipment, but the orbital change frequency after launching is not high, and it is obvious that there are other undisclosed functions."
The reconnaissance satellites are named as China. Like the operation of "resources" and "ocean", all major powers will launch some mysterious spacecraft, and they can only guess before collecting enough feature information.
This STP4D is obviously a part of the opponent's advance layout.
No mistakes, one song, one content, one in 6, one book, one bar, one reading!
Now I guess I noticed some clues, so I activated this hidden stake.
"On the surface, the operation is very conventional, for example, here, a technology that uses Doppler shifts to compensate orbital motion errors is an ordinary technique."
Chang Haonan explained while Circle the slight fluctuations in the spectrum, and the amplified waveforms show serrated characteristics:
"But in fact, conventional DRFM signals will not have such efficient adaptive characteristics, and the waveform replication speed in this set of characteristic signals It is three orders of magnitude faster than usual demand, so it is for us."
Liao Yongcai was still digesting and absorbing the huge amount of information from the conversation just now, but Guo Lin had already figured out most of the joints.
Except for the reason.
"But...why?"
He leaned over to the screen, as if he wanted to stuff his eyes inside:
"Just to hinder our radar debugging process How many days...the longest is no more than half a month? ”
"Of course it's impossible." Chang Haonan waved his hand and suddenly asked: "Have you ever considered why there was no problem with the test of array 1 and 2? ”
Guo Lin of course thought about this problem, 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 is probably not that simple.
Before Guo Lin could reply, Chang Haonan gave the answer directly: "The No. 3 array 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 interference in the conventional way and complete debugging, no abnormalities can be seen in normal work, but as long as the other party strengthens the interference level, a defect that is sufficient to be exploited by the other party will appear. "
Guo Lin's eyes widened slightly.
I thought about Americans playing with vaginal fun, but I never thought about the other party playing with vaginal fun.
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, and only needs to re-write the beam control algorithm, consider the ionosphere Faraday rotation effect, and add polarization compensation coefficient..."
"..."
After the initial finalization of the solution, Guo Lin led a group of technicians to work quickly.
Chang Haonan suddenly turned his head and looked at Liao Yongcai, who seemed to have not fully reacted: "Director Liao, the interference encountered by the 7010 radar twenty-five years ago, I'm afraid it's not from a radar reconnaissance satellite as you guessed..."
(This chapter ends)