Chapter 1089 Dongfeng Aerospace City
Summer is passing and autumn is coming.
In the midst of busy work, time quickly came to September 2003.
Chang Haonan was finally relieved from the busy work just after the new model project was approved.
However, the free time left for him did not last long.
On September 17, the astronauts on the first flight of Shenzhou 5 entered the site, completed joint inspections of people, ships, rockets, and ground, and conducted a complete negative eight-hour launch procedure drill, which also marked the final stage of China's first manned space mission. countdown stage.
According to the plan, the rocket will be transported vertically to the launch area on October 8 and launched on October 15.
As far as Shenzhou 5 itself is concerned, as long as no accidents occur, the plan has been finalized and there cannot be any major changes.
But there is still a lot of room for change in some other tasks related to launch.
For example, data transmission tasks...
With the advancement of Zhang Weiyong, Guo Lin and others, the small satellite group named "Qingluan" was launched half a month ago on a Long March 4 rocket and was confirmed to be in normal working condition.
But that doesn’t mean all is well.
There are only four satellites operating in MEO orbit, which means that providing stable relay guidance services to the spacecraft must not be stable enough.
Therefore, Guo Lin’s previous statement was also that the coverage rate was “the highest”, that is, in a certain circle during the operation of the spacecraft, it could reach 50%.
But the Shenzhou-5 mission only lasted less than one day.
It can only circle the earth 13-14 times at most.
Although the first manned flight is mainly for verification, the specific tasks of each lap will also be arranged before launch.
The specific plan requires more detailed planning.
Therefore, after a few days of short rest in Haojing, he rushed to the satellite launch center in person...
China's launch base for the 921 project, although its name is Suzhou Satellite launch center, but part of it is located in the EJNQ area of Mongolia.
In fact, it has a special name.
Dongfeng Aerospace City.
At this moment, Taolai Airport does not even have a plan. The nearest airport that can land fixed-wing special planes is Dingxin Base.
But there is still some distance.
So, the launch site arranged for Chang Haonan to transfer in Dingxin and take a helicopter to the final destination.
He was relatively resistant to this plan at first.
Helicopters, because they fly in the lower troposphere most of the time, the noise and vibration in the cabin of even the most advanced models are much stronger than that of fixed-wing aircraft.
In comparison, taking a car may be a more comfortable option.
However, when Chang Haonan actually arrived at Dingxin Airport, he still performed a really good show on the spot -
Parked not far away was an aircraft that obviously belonged to the search, rescue and recovery air force. helicopter.
But it is not the Mi 17 that was common in TVs in the previous life.
It is a Z-12 painted in camouflage.
That is the Chinese version of NH90.
This is not the first time Chang Haonan has ridden on a model he participated in designing.
I had already experienced this once when I was doing ground testing of the relay communication system last year.
But it was somewhat beyond his expectation that this model, which had been in service for less than three years, was selected to perform search, rescue and recovery missions so quickly.
While Chang Haonan was standing at the door of the cabin, stunned, two people in fur coats also jogged all the way to the gangway.
The leader is naturally Guo Lin.
"Mr. Chang."
Guo Lin took two steps forward, took the initiative to say hello to Chang Haonan, then turned sideways and motioned to the other person next to him:
"This is Comrade Song Lei, the head of the 22nd Institute of Electrical Engineering."
Hearing the other party's workplace, Chang Haonan suddenly understood.
The 22nd Institute of Electrical Engineering is the technical unit responsible for aerospace search, rescue and recovery.
It should be the staff who came to accompany you.
After a brief exchange of greetings, the three of them walked towards the helicopter landing pad.
On the way, Guo Lin began to report the current situation:
"Mr. Chang, the Qingluan constellation has conducted two rounds of communication tests with the target spacecraft in sun-synchronous orbit, and the results fully met the design requirements. The next step is to It is necessary to make an attitude adjustment after the plan is finalized to fully adapt to the requirements of the Shenzhou-5 relay mission. "It's just that the meteorological department reported that the weather over Beijing has been cloudy and cloudy at any time in the window of mid-October." It may rain. For the sake of safety, would you consider moving the ground measurement and control center to Shule Measurement and Control Station? ”
Since the relay communication system was originally designed to adapt to the space-based remote sensing system? , so the initially set ground terminal was naturally located in Danju, the capital city.
Measurement and control tasks in Beijing generally use C/S/L bands, which are almost not affected by weather.
But for the Qingluan constellation that chose the Ka band, it still brings some risks.
Of course it will not cause the connection to be disconnected directly, but it is not always a good idea if the entire video freezes halfway through the transmission.
The Shule Station in Xinjiang Province wishes it had 360 sunny days every year, so it has no worries at all.
Chang Haonan slowed down after hearing this and thought for a moment.
Finally, he shook his head and said:
"To carry out relay communication tasks, a large amount of equipment needs to be installed in advance. The location of Shule Station is too sensitive. After all, our constellation does not fully serve manned spaceflight, so it is better to avoid it..."
In addition to the well-known internal problems, due to the strong penetration of the United States into Central Asia and the deployment of a large number of military bases and intelligence centers in Aiwuhan, the western region also became one of the regions most severely penetrated by the outside world for a period of time in the early 21st century. one.
It’s okay to fly there for aerial testing, but it’s still a bit risky to transport sensitive equipment over land.
"The backup plan..."
Guo Lin also looked embarrassed.
"The high-altitude airship we used for relay communication testing should not be returned yet. If the weather in Beijing is really bad enough that the Ka-band signal cannot penetrate the rain area, the airship can be used to relay the signal again and be transmitted to Haojing's 26 Experimental training base..."
"..."
As they spoke, several people had already arrived next to the helicopter that had already been warmed up and prepared.
I have to admit that the three-color camouflage paint on the helicopter does look rather... earthy.
Even if it is the same helicopter, if it is replaced with a later desert color or light gray paint, the appearance can be improved several levels out of thin air.
Song Lei, who had been silent just now, took two steps forward and took the initiative to open the hatch.
Chang Haonan held on to the brim of his hat and ducked in.
He looked around in the cabin and finally determined that the aircraft's comfort configuration should be fully loaded according to European standards.
Proper VIP plane.
Obviously not the level of ordinary Lao Lu.
This shows that this is a specially purchased aircraft, rather than a temporary model seized from some unlucky unit of the Army Aviation Corps.
"You change clothes very quickly."
"The superiors specifically support..."
Song Lei, who came up later, replied while fastening his seat belt:
“It is said that the specific landing location of the astronauts is uncertain, and they may need the services of medical surveillance and medical insurance helicopters. Although the Mi-17 is powerful enough, its comfort is really... average, and search and rescue helicopters will fly frequently. Appearing in the news, from all aspects, it is more appropriate to use domestic models..."
...
Not long after, the helicopter flew over Dongfeng Aerospace City.
Actually, this is Chang Haonan’s first time here.
Looking from a distance, you can see an isolated city located in the desert,
especially the two giant buildings, the tall vertical assembly plant and the launch tower, as well as the two giant buildings connected between them. Transfer track.
Watching it on TV, you may not feel anything.
But to visit here in person is to be condescending, and the shock it brings is real.
Under Song Lei's special request, the helicopter did not land immediately. Instead, it flew around the launch center for half a week before landing smoothly on the apron.
Although he was very curious about the situation in the launch site area, but after all he was on a mission, Chang Haonan quickly got in the car and walked through the center of the base to the general technical department.
Under the leadership of Song Lei, several people quickly arrived at Shen Junrong's office.
The latter has obviously been waiting here for a long time.
Even before Chang Haonan knocked on the door, he quickly stood up and welcomed him in.
"Comrade Haonan, I have waited for you..."
Shen Junrong gestured for Chang Haonan to sit on the sofa, while carrying the kettle from the side and pouring it for him himself. Cup of Tea:
“Now that the broadcast plan has been basically finalized, I’m just waiting for you to give me confirmation on the specific time frame within which continuous communication can be guaranteed...”
As soon as he finished speaking, Chang Haonan put the briefcase in his hand in front of him:
"I have prepared a detailed plan."
"According to the actual situation on the day of launch, It can be guaranteed that at least two of the eighth to tenth orbits around the earth will provide high-throughput data transmission for no less than 30 minutes!”
(End of this chapter)
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