Data sum of Chang 'e 1 (come and help)

Chang 'e-1 satellite was developed by China Academy of Space Technology and named after Chang 'e, an ancient mythological figure in China. It is mainly used to obtain three-dimensional images of the lunar surface, analyze the distribution characteristics of related material elements on the lunar surface, detect the thickness of lunar soil, and detect the space environment of the earth and the moon. At present, this satellite has entered the initial sample development stage. At this stage, there will be two prototype satellites, namely the electric satellite and the structural satellite, to undertake satellite testing.

According to aerospace experts, the electric satellite test is mainly used to comprehensively test some equipment with electronic performance, while the structural satellite test is mainly to evaluate the rationality of structural design and the rationality of temperature control design on the whole satellite. At present, the structural manufacturing of these two prototypes has been completed, and the whole satellite test will be started before the end of the year. On this basis, the prototype satellite of Chang 'e-1 will be developed. According to reports, the entire initial sample testing phase will last until June next year, and then it will enter the development stage of satellite positive sample stars.

In addition, the Long March 3A rocket, which undertakes the satellite launch mission, has also been put into production. In order to ensure the completion of the lunar exploration project, researchers designed 4 1 reliability design for the Changsanjia rocket to improve its carrying reliability.

Technical difficulties

1 Orbit design and flight program control

2. Three-vector control problem of satellite attitude control.

3. Adaptive design of satellite environment

4. Chang 'e-1 satellite for long-distance measurement, control and communication was developed by China Academy of Space Technology. It is mainly used to obtain three-dimensional images of the lunar surface, analyze the distribution characteristics of related material elements on the lunar surface, detect the thickness of lunar soil, and detect the space environment of the earth and the moon. Chang 'e-1 lunar exploration satellite consists of a satellite platform and a payload. The satellite platform was developed with the technology of Dongfanghong-3 satellite platform, and the researchers made adaptive modifications to eight subsystems, including structure, propulsion, power supply, measurement and control, and data transmission. Payload includes scientific detection instruments, such as CCD stereo camera, imaging spectrometer, solar cosmic rays monitor and low-energy particle detector.

In June 2007, the Chang 'e-1 lunar exploration satellite will be launched by the Long March 3A carrier rocket in xichang satellite launch center. After the satellite is launched, it will take 8 to 9 days to complete the phase modulation orbit, the earth-moon transfer orbit and the orbit around the moon, and carry out scientific exploration tasks. It will complete four scientific tasks, the main purpose of which is to "portrait" the moon, that is, to obtain images and three-dimensional images of the moon surface through various means. In addition, it is necessary to analyze the distribution characteristics of useful elements and material types on the surface of the moon, and detect the thickness of lunar soil and the space environment of the earth and the moon.

According to experts, Chang 'e-1 satellite is two meters square. After the solar wing is deployed, the longest length can reach18m, and the take-off weight is 2350kg. It takes 10- 12 days for a satellite to fly near the moon. Chang 'e-1 has a design life of one year and will not return to Earth after the mission. Starting step

After the launch, Chang 'e-1 satellite will be sent into geosynchronous elliptical orbit, with the shortest distance from the ground being 500 kilometers and the longest distance being 70,000 kilometers. The lunar exploration satellite will orbit this orbit for 26 hours, and then accelerate into a larger elliptical orbit. The shortest distance from the ground is 500 kilometers, and the longest distance is1.20 thousand kilometers. It takes 48 hours to orbit once. Since then, the exploration satellite has been accelerating and began to "rush" to the moon. After about 83 hours' flight, when it was about to reach the moon, it slowed down by controlling the rocket's reverse booster. After being "captured" by the gravity of the moon, it became a satellite orbiting the moon, and finally flew around the moon in a polar orbit 200 kilometers from the surface of the moon to take three-dimensional images.

It is estimated that the total time for a satellite to fly to the moon is 157 hours, which is close to 384,400 kilometers from the earth. In the past, the satellites launched by China were generally about 35,800 kilometers above the ground, which was almost 10 times.

Chang 'e project lunar exploration plan

Ouyang Ziyuan, chief scientist of China's lunar exploration project and academician of China Academy of Sciences, said that Chang 'e-1 is the farthest satellite launched by China, with an average distance of 380,000 kilometers from the Earth. Prior to this, the farthest satellite launched by China was 40,000 kilometers above the ground.

The lunar exploration project will achieve the following four scientific goals:

1. Obtain the three-dimensional image of the lunar surface, finely divide the basic structure and geomorphic units of the lunar surface, and study the shape, size, distribution and density of impact craters on the lunar surface, providing basic data for the age division and early evolution history research of terrestrial planets, and providing basic data for the location optimization of lunar soft landing area and lunar base.

2. Analyze the distribution characteristics of useful elements and material types on the lunar surface, mainly investigate the content and distribution of titanium, iron and other 14 elements with development and utilization value on the lunar surface, draw the monthly distribution map of each element, the thematic map of lunar rocks, minerals and geology, find the rich areas of each element on the lunar surface, and evaluate the development and utilization prospects of lunar mineral resources.

3. Detecting the thickness of lunar soil, that is, using microwave radiation technology to obtain the thickness data of lunar soil, so as to obtain the age and distribution of lunar surface, and on this basis, estimate the content, resource distribution and resource quantity of helium -3 as fuel for nuclear fusion power generation.

Fourth, explore the space environment from the earth to the moon. The average distance between the moon and the earth is 380 thousand kilometers, which is located in the far magnetic tail region of the earth's magnetic field space. In this area, satellites can detect solar cosmic rays high-energy particles and solar wind plasma, and study the interaction between the solar wind and the moon, as well as the earth's magnetic field and the moon's magnetic tail.

Luan Enjie, deputy director of the Commission of Science, Technology and Industry for National Defense, director of the National Space Administration and commander-in-chief of the lunar exploration project,

The lunar exploration engineering system consists of five systems: lunar exploration satellite, launch vehicle, launch site, measurement and control and ground application, and will achieve the following five engineering objectives:

1) to develop and launch China's first lunar exploration satellite;

2) Master the basic technology of lunar exploration;

3) Scientific exploration of the moon for the first time;

4) Preliminary construction of lunar exploration space engineering system;

5) Accumulate experience for the follow-up lunar exploration project.

history

The lunar exploration program has been brewing for 10 years.

As early as 1994,

1996 studied the technical scheme of lunar exploration satellite.

1998 has completed the research on key satellite technologies, and further demonstration work will be carried out later.

After 10 years of brewing, it was finally determined that the whole lunar exploration project in China was divided into three stages: around, down and back.

1) The first phase of the lunar orbiting project will launch the lunar exploration satellite "Chang 'e-1" in 2007 to detect the lunar surface environment, landform, topography, geological structure and physical field.

2) The second phase is planned to be carried out from 2007 to 20 10, with the goal of developing and launching spacecraft and landing on the moon in a soft landing mode for exploration. The specific scheme is to detect the composition of rocks and minerals in the landing area with patrol cars and automatic robots that landed safely on the lunar surface, measure the heat flow and surrounding environment at the landing site, and carry out high-resolution photography and on-site detection or sampling analysis on the lunar rocks, so as to provide chemical and physical parameters of the lunar surface for the future lunar base site selection.

3) The third stage is planned to be carried out from 20 1 1 to 2020, with the goal of lunar patrol and sampling return. In the early stage, we mainly developed and launched a new soft landing lunar patrol device to patrol the landing area. Later, after 20 15, we developed and launched a small sampling return cabin, a lunar rock drill, a lunar sampler and a robotic manipulator. The key samples were collected and returned to Earth to inspect the landing zone, which provided data for the next manned lunar exploration and the establishment of the lunar outpost. The completion of this project will take China's space technology to a new level.

test

The payload prototype system of Chang 'e-1, the first satellite of China's lunar exploration project, is undergoing the final joint test to ensure the normal work of scientific exploration equipment in space in the future.

The Space Science and Application Research Center of Chinese Academy of Sciences is responsible for the development and testing of the payload of Chang 'e-1 satellite. In an interview with 16 on June 6, Wu Ji, the chief commander of the payload and director of the Space Science and Application Research Center, said: "In the final stage of the joint test of the payload prototype system, all developers should continue to maintain a rigorous and meticulous working attitude and complete the joint test of the prototype according to the quality requirements to ensure the smooth delivery of the payload equipment and the successful completion of the engineering task."

The satellite payload varies with different space missions. At present, it is mainly instruments for scientific exploration and equipment for scientific experiments. The payload of Chang 'e-1 satellite will include microwave detector subsystem, space environment detection subsystem and payload data management subsystem.

It is understood that the microwave detector subsystem will mainly estimate and evaluate the thickness of lunar soil, which is the first time in the world to detect the lunar surface by passive microwave remote sensing. The space environment detection subsystem consists of three devices, such as solar high-energy particle detector, which will detect the space environment parameters of the earth, the moon and the near moon.

Chang 'e-1 is scheduled to be launched in 2007, followed by a one-year lunar exploration.

After long-term preparation and demonstration in 10 year, China's lunar exploration project was formally established in 1 month in 2004, which was called "Chang 'e Project" in history. At present, the project mainly carries out lunar exploration, three-dimensional image analysis of the moon, global content and distribution survey of useful elements and material types of the moon, lunar soil thickness detection and space environment detection of the earth and the moon.

related data

Portrait the moon

The lunar exploration project is the first stage of China's lunar exploration project, which is to develop and launch the first lunar exploration satellite. The star will orbit the moon and send the detected data back to the ground. The project consists of five systems: lunar exploration satellite, launch vehicle, launch site, measurement and control and ground application. It is confirmed that the lunar exploration satellite mainly uses the platform of Dongfanghong III, the launch vehicle uses the Long March 3A rocket, the launch site uses the xichang satellite launch center, the exploration system uses the existing TT&C network, and the ground application system is developed by China Academy of Sciences.

The specific scheme is that the Long March 3A rocket takes off from Xichang Launch Center, and sends the Chang 'e-1 satellite into geosynchronous transfer orbit to realize the separation of the star and the arrow, and finally the satellite enters the circular orbit around the north and south poles of the moon to detect the moon. The orbit is 200 kilometers above the surface of the moon.

The "Chang 'e-1" satellite with a design life of 1 year will be equipped with stereo cameras, imaging spectrometers, laser altimeters, microwave radiometers, solar cosmic rays detectors, low-energy ion detectors and other scientific instruments for lunar exploration. During the mission around the moon, it mainly obtains three-dimensional images of the lunar surface, analyzes the distribution characteristics of useful elements and material types on the lunar surface, detects the thickness of lunar soil, and detects the space environment of the earth and the moon. Among them, the first three projects have not been carried out abroad, and the fourth project is the first time that China has obtained the space environment parameters beyond 80,000 kilometers. In addition, the United States has explored five kinds of resources on the moon, and China will explore 14 kinds, among which the important target is the helium -3 resources on the moon. Helium -3 is an important fuel that is safe, efficient, clean and pollution-free. According to statistics, helium -3 on the moon can meet the power supply needs of human beings 1 10,000 years. The content of helium -3 in lunar soil can reach 5 million tons.

observe

The launch of China's first lunar exploration satellite, Chang 'e-1, is just around the corner, and people's enthusiasm for seeing the Goddess Chang'e flying to the moon is increasing. The reporter learned from Jinying Travel Agency in Xichang, Sichuan that the travel agency organized a visit kick-off activity, and more than 1000 people have signed up for the visit. At the same time, the ticket price of the previously booked 800 yuan tour may be raised.

Foreign tourists have no chance to "live"

According to the staff of Xichang Jinying Travel Agency, by the afternoon of September 27th, 2007, more than 65,438+0,000 people from Beijing, Shanghai, Guangzhou and other cities in China had signed up for the competition, mainly individual tourists. Because Xichang Satellite Launch Base can only have 2000 on-site seats at most, and people from military, scientific research units, government and other departments must first meet, and the actual number of ordinary visitors is less than 2000.

However, the ticket prices in 800 yuan reported by the media before may go up. The specific price adjustment results will be announced by the travel agency on September 28, 2007.

It is understood that these tourists are limited to domestic tourists. At present, foreign tourists are still not within the reception range of on-site visits.

Inform the local police of their identity.

It is understood that China tourists can "book" the places they visit only by sending their identity documents to the travel agency and paying a deposit of one or two hundred yuan, without providing other information such as their work units. Once the launch center determines the specific launch date, the travel agency will inform the applicant a few days in advance.

After receiving the copy of the applicant's ID card, the travel agency will make a backup and provide it to the satellite launch center for review. The launch center will also verify the identity of tourists with the local public security organs and notify them so as to contact relevant personnel at any time in case of emergency.

Admission is limited to two hours in advance.

Xichang satellite launch center Travel Agency said that the launch date of "Chang 'e-1" is tentatively scheduled to be around 20071October 26th, and the specific launch time is "most likely at night". However, the more exact launch time has yet to be finalized by relevant departments. Earlier, some media reported that it would be launched at the end of 10.

Can impatient tourists enter the launch base in advance to see the elegance of "Chang 'e-1"? In this regard, the staff of the travel agency said that it is "absolutely impossible" because vehicles entering and leaving the base must be released with special passes. Individual travelers organized by travel agencies will enter the launch base by unified bus, "at most one or two hours in advance".

Portable camera shooting and launching

On the day of the launch, all tourists will gather in Xichang, which is more than 60 kilometers away from the satellite launch center, then take a special bus to enter the launch center, and then return to Xichang after visiting the grand launch that night. It is also known that the observation deck is about 2.5 kilometers away from the launching point. In order to meet the requirements of tourists to take photos, the travel agency revealed that this visit will probably let tourists bring cameras and cameras as souvenirs to record that exciting moment as before. In addition, in order to cooperate with the "trip to the moon", the local travel agency has also developed and designed a wealth of scenic spots, which constitute a "one-day tour" and a "two-day tour".

The launch was originally scheduled for 20071October 24th+18: 05.

According to experts, it is quite complicated to determine the optimal launch time of a satellite, which requires a detailed analysis of local factors such as lightning, precipitation and cloud cover, and combined with relevant historical data to make a judgment. After repeated consultations with the departments of aerospace, satellite launch, meteorology and astronomy, the best launch window was finally determined to be 654381around 6: 05 pm on October 24.

At present, all preparations in xichang satellite launch center are proceeding in an orderly and intense manner. The Long March 3A rocket used to launch "Chang 'e 1" has been hoisted into the rotating platform of Tower 3, and "Chang 'e 1" has also entered the launching area. Tower 3 stands quietly, and the blue rotating platform is closed, showing a test state. Xichang satellite launch center's scientific and technical personnel in the five systems of test launch, measurement and control are racing against time to make accurate measurements, making final preparations for ensuring the smooth launch of Chang 'e 1 satellite. At present, all preparations are progressing smoothly.

It is understood that in order to ensure the smooth launch of "Chang 'e 1", xichang satellite launch center has carried out dozens of technical transformations on the No.2 and No.3 launch towers. At present, both towers in the center are capable of launching "Chang 'e 1". Some experts commented that the upgraded No.3 launch tower has become one of the most advanced launch towers in the world. In a few days, "Chang 'e 1" will take off from the 85-meter-high No.3 launch tower and head for the moon 380,000 kilometers away. At that time, the world will pay attention to China again.

"Chang 'e I" has "stood" on the launch tower.

10 On the afternoon of June 7th, the reporter drove from Xichang to the southwest of Huang Lu Expressway. From time to time, you can see rocket sculptures and slogans such as "Satellite City" along the way. About 35 minutes later, the car got off the Huang Lu Expressway from Manshuiwan Town and turned to a simple asphalt highway. The locals call entering this simple highway "into the ditch". I wonder if it has something to do with the satellite launching base in the ravine.

The launch center is heavily guarded on 17 and can be visited on 18.

As the satellite launch is just around the corner, the satellite launch center will be closed to tourists all day on June 10 and June 17.

Standing in front of the xichang satellite launch center stone carving, you can see a tall building in the distance. According to local people, that is the "Chang 'e-1" launcher that will be launched soon. In front of xichang satellite launch center, one guard stood majestically, while another guard checked the documents of passing vehicles and pedestrians.

According to the staff of the local travel agency, xichang satellite launch center was normally open to tourists on June 16 and June 18.

In addition, before the launch of Chang 'e-1, residents within 4 kilometers of Fiona Fang will be evacuated, and residents within 2.5 kilometers must be evacuated from the area. It is said that this move is to prepare for the failure of rocket launch and avoid causing casualties to nearby residents.

Under the "Chang 'e" launcher, the lights flashed.

101October 17, the reporter entered the area near the launch center, only 200 meters away from the nearest satellite launcher. Standing halfway up the mountain to the south of the launch center, you can see that the launch center is surrounded by mountains on three sides: Yak Mountain on the left and Canyon Mouth on the right. The opposite mountain peak is very small, and the locals have not named it yet.

The reporter saw that the tall No.2 launch tower and No.3 launch tower were divided into two areas. The No.2 launch tower, the tallest in Asia, is in a state of separation, with the fixed frame and the mobile tower standing at the two ends of a railway track respectively.

The most striking thing is the third tower, which is about to launch Chang 'e-1. Unlike Tower 2, Tower 3 is totally enclosed. From the outside, it looks like a windowless building with a huge orange crane above the roof.

According to the evaluation of aerospace experts, the upgraded No.3 launch tower has become one of the most advanced launch towers in the world. In addition, six lightning towers distributed throughout the launch base are towering into the sky, and the longest is about 70 stories high.

It is understood that as of the afternoon of June 65438+1October 65438+July, the Long March 3A rocket and Chang 'e-1 used to launch Chang 'e-1 have been hoisted on the launch tower and are undergoing the final test.

The reporter saw that the vehicles and personnel in the base were busy shuttling back and forth. Under the "Chang 'e-1" launcher, several electric lights are particularly shiny, just like the flames ejected during launch.

Previously, in order to ensure the smooth launch of Chang 'e-1, xichang satellite launch center has carried out dozens of technical transformations on the No.2 and No.3 launch towers. At present, the two towers in the center are capable of launching Chang 'e-1.

The roof of the observation deck is made of iron.

Spend 800 yuan money to watch the launch of Chang 'e-1 in the designated area. The reporter learned yesterday that Xichang Jinying Travel Agency, which organized the satellite launch, has stopped receiving registration and forecast names. Yesterday at noon, the reporter came to this travel agency, and the staff was nervously informing the tourists who paid the deposit all over the country.

"We informed these tourists to arrive in Xichang on the 23rd." A female staff member said. The reporter found that few Wuhan tourists signed up to watch the satellite launch.

It is understood that Jinying Travel Agency, entrusted by xichang satellite launch center, China, exclusively handles the procedures for domestic and foreign tourists to visit. The travel agency set up a souvenir shop in the satellite base and set up a team to explain the satellite base.

The reporter also visited the "the Goddess Chang'e flying to the moon" observation deck in advance. Under the leadership of the staff, the reporter saw that the "observation deck" was a four-story building.

A two-story "observation deck" was built on the roof with iron sheets. A staff member said: "When the satellite is launched, you can see the rocket taking off here."

Standing upstairs, looking straight ahead, you can vaguely see the majestic posture of the "Chang 'e-1" launcher. -It's only four kilometers from the launch site.

"

Chang 'e-1 will use the "laser eye" made in Shanghai to shoot the first China version of the full moon topographic map.

Whether "Chang 'e" flies to the moon or lands on it, it is necessary to make a map of the moon first, which is a compulsory question for every country that makes a lunar exploration plan, and the "Chang 'e-1" satellite that is expected to be launched later this month is no exception.

The reporter learned that this satellite is equipped with a laser altimeter independently developed by Shanghai researchers, and will assume the responsibility of being the first "lunar photographer" in China, shooting the first high-precision topographic map of the whole moon in China for the world.

The first space "laser eye"

As one of the most important payloads of Chang 'e-1, the prototype of this laser altimeter has been loaded with stars. In Shanghai, you can see its prototype. Its "body length" is 30 cm and its "weight" is 15 kg. It looks like a camera in an iron box, but it "shoots" not a plane image, but a three-dimensional image. What makes experts proud is that Shanghai Institute of Technical Physics and Shanghai Institute of Optics and Fine Mechanics of Chinese Academy of Sciences delivered this "laser eye" on time in just two years on the basis of previous scientific research. All the key components have been localized, and the overall level has reached the international advanced level, which will soon become the first laser altimeter launched in China.

Laser photo "stop watch"

The drawing form of "laser eye" is unusual. It will continuously emit and receive the laser reflected to the moon through the "stopwatch" laser altimeter instead of imaging, and keep accurate timing. With it, "Chang 'e I" is like sending "speed sprinters" to the surface of the moon one after another. As soon as these "athletes" touch the surface of the moon, they immediately return to the original road; According to its "running" results, the laser altimeter can calculate its running distance in real time, so as to distinguish which is higher and lower on the surface of the moon, which is a mountain and which is a basin, and finally get the actual altitude of each place and synthesize it with the altitude of the moon into a complete topographic map.

According to the plan, the laser altimeter will start working after Chang 'e-1 enters the stage of flying around the moon. Whether the surface of the moon is day or night, whether the satellite is flying forward or sideways, it will be on for a long time and emit a laser beam every second at an orbital height of 200 kilometers. In this way, "Chang 'e" circled the moon like a ball of wool, leaving a laser "footprint" and scanning all the conditions of the moon.

Lay the foundation for the later landing.

Laser altimetry technology will not only lay the foundation for the later lunar exploration project, but also be extended to other deep space exploration fields. American scientists used this laser altimeter on the first and second generation Mars probes. Different heights are calibrated with different colors, which shows the landform of Mars concisely and vividly, and also provides valuable basis for the Mars probe to choose the best landing site.

It is reported that China has begun to explore Mars and asteroids, and this kind of "laser eye" is expected to play a role in it.

Chang 'e 1 will be launched at 6: 00 pm on October 24th, 65438/KLOC-0. Astronomical and aerospace research experts also confirmed this statement.

According to experts, it is quite complicated to determine the optimal launch time of a satellite, which requires a detailed analysis of local factors such as lightning, precipitation and cloud cover, and combined with relevant historical data to make a judgment. After repeated consultations with the departments of aerospace, satellite launch, meteorology and astronomy, the best launch window was finally determined to be 654381around 6: 05 pm on October 24.

At present, all preparations in xichang satellite launch center are proceeding in an orderly and intense manner. The Long March 3A rocket used to launch "Chang 'e 1" has been hoisted into the rotating platform of Tower 3, and "Chang 'e 1" has also entered the launching area. Tower 3 stands quietly, and the blue rotating platform is closed, showing a test state. Xichang satellite launch center's scientific and technical personnel in the five systems of test launch, measurement and control are racing against time to make accurate measurements, making final preparations for ensuring the smooth launch of Chang 'e 1 satellite. At present, all preparations are progressing smoothly.

It is understood that in order to ensure the smooth launch of "Chang 'e 1", xichang satellite launch center has carried out dozens of technical transformations on the No.2 and No.3 launch towers. At present, both towers in the center are capable of launching "Chang 'e 1". Some experts commented that the upgraded No.3 launch tower has become one of the most advanced launch towers in the world. In a few days, "Chang 'e 1" will take off from the 85-meter-high No.3 launch tower and head for the moon 380,000 kilometers away. At that time, the world will pay attention to China again.

If Chang 'e-1 is abnormal, it can be destroyed by laser.

Some parts in the rocket have two or three parts, and one or two parts are allowed to break, which will not affect the normal work of the whole rocket. Other devices are "two-point and two-wire redundancy" and so on.

In addition, xichang satellite launch center's technicians also "lightened" the rocket (professionally called "derated design"), and adopted a double-track design, leaving a margin to ensure the safety of the line. Generally, the equipment burden can be reduced by half.

It is reported that xichang satellite launch center has carried out some system-level redundancy since 2003, mainly the redundancy of control system.

The reporter learned that when the rocket flies, there is a measuring system to measure its position and speed. Its computer equipment uses three central processing units. It is reported that the rocket includes a control system (similar to steering equipment), a structural system (bearing), a power system and a measuring system.

Rockets that run abnormally beyond the safe range will be crushed.

At present, the launch safety of Chang 'e-1 has been foolproof. In terms of personnel evacuation, the local government is responsible (this newspaper has reported in detail). Other security aspects are the responsibility of troops and scientists.

Not only that, "the base is technically prepared for the worst, and it is very advanced and mature." Yesterday, the relevant person who attended the "Launch Safety" meeting in Manshuiwan revealed to reporters: "The launch base has done its best to provide technical support for the two types of failures that may occur during rocket launch."

On one occasion, the Long March 3A rocket suddenly stopped for some unpredictable reason when it ignited and took off. Once this symptom occurs, the emergency plan of the whole system will be quickly started to eliminate all possible dangers. It is said that this technology is in an absolute leading position in the world and can completely prevent problems before they happen.

On the other hand, when the rocket is normally ignited and lifted off, in a very short time, the orbit operation abnormality suddenly appears, and this abnormality is beyond the safety range. At this critical juncture, the laser and other instruments that escort the rocket to the sky quickly play a role, aim at the core target and smash it, and its debris will definitely fall into the evacuation safety zone, without causing any casualties.