At which translation point is Chang e 1 located?

Chang'e-1 is a polar-orbiting satellite around the moon and is not fixed at any Lagrangian translation point.

The pull point of the earth and the moon is very far, and the pull point of the sun and the moon is even more unreliable, and the orbital altitude of Chang'e is only 200km, which is obviously not enough to reach the flat point.

The image of the lunar surface is obtained through RS technology, and the Zhengkong station is called on the ground to locate Chang'e-1 and Stool Song through GPS (navigation is an application of GPS), and transmit data, display it through GIS, and return to the capsule through GPS combined with GIS search and rescue.

Let's just talk about the principle stuff, right? For example, the image of the basic data is obtained through RS technology, and then processed by GPS positioning, mining or imitation GIS. Multiple choice questions The image of the Tuanling Tomb should be obtained mainly by using remote sensing technology to judge fibers.

The first image of the lunar surface of China's first lunar exploration project was obtained by a CCD stereo camera on the Chang'e-1 satellite. The CCD camera uses the linear array push broom method to obtain images, with an orbital altitude of about 200 km, a lunar surface width of 60 km and a pixel resolution of 120 m in each orbit. China's first lunar surface image was made from 19 orbital images, located at 83 degrees east longitude to 57 degrees east longitude, 70 degrees south latitude to 54 degrees south latitude, with a width of about 280 km and a length of about 460 km.

The 60-kilometer-wide strip on the right side of the picture is the first track image obtained by the CCD camera.

Like Chang'e-1, which went to the moon for the first time three years ago, Chang'e-2 is still a trembling code detection satellite around the moon. However, Chang'e-2 is by no means a simple repetition of Chang'e-1. Inheriting the past and forging ahead into the future, and acting as a guide for the future Chang'e-3 to achieve the "moon landing", this is the historical mission of Chang'e-2. Project No. 2 has four characteristics:

Fast, close, fine, and more. "Fast" means that the time is fast, Chang'e-1 took nearly 14 days to enter the working orbit, and Chang'e-2 can do it within 7 days. "Near" means that the orbit around the moon has changed, Chang'e-1 is 200 kilometers, and Chang'e-2 is 100 kilometers; In addition, Chang'e-2 will also carry out a 15-kilometer orbit descent, that is, the closest distance of the satellite from the lunar surface is only 15 kilometers.

The resolution of the camera's imaging of the moon is better than 10 meters at 100 kilometers, and 1 5 meters at 15 kilometers, which is much higher than the resolution of the Chang'e-1 camera at 120 meters. "Many" means that there are many test items, including band deep space exploration tests and some camera tests. The lead is mainly embodied in:

First, Chang'e-2 will go directly to the moon this time, and Chang'e-3 will also follow this orbit in the future; Second, the 100-kilometer circumlunar technology and 15-kilometer orbit descent technology are also preparing for Chang'e-3; Third, we need to carry out high-precision imaging of the Hongwan area where Chang'e-3 is planned to land. Advanced technologies such as technical test systems, frequency band measurement and control systems, cameras, etc. In addition, the rocket we chose this time is also different, Chang'e-1 uses Changsanjia, this time it uses Changsanc, it has two boosters, and the thrust is greater.

Another example is the highlight: the first is the launch. After the launch, we are ready to image the Earth on our way to the moon.

Secondly, after the near-moon braking, we will strive to image the moon and the earth at the same time, but this will have to be tested and cannot be guaranteed at present. In addition, there are two very important highlights, one is that the satellite was captured by the moon, and the other is the 15-kilometer de-orbit. This time, the carrier rocket will directly send the satellite into the Earth-Moon transfer orbit, which is a major innovation of Chang'e-2.

For example, Chang'e-1 is our eldest girl, the eldest girl married the moon, first circled around her mother's house three times, and walked for 14 days before reaching the moon. Chang'e-2 is the second girl, and she is also going to marry the moon, and we hope that she can take a shortcut, no longer go around, and directly enter the 380,000-kilometer orbit to the moon. This saves the propellant of the rocket on the one hand, and on the other hand, allows time to do more experiments on the moon.

Doing so gives us less freedom to choose the launch window, and we have to choose more accurately. In addition, the thrust of the rocket must be greater, and the accuracy of orbit entry must be higher. Chang'e-2 is the pilot star of Chang'e-3, and one of its goals is to provide high-resolution imaging of future landing areas.

We currently chose to carry out high-resolution imaging in the Hongwan area, that is, about 43 degrees north latitude and 31 degrees west longitude, which is 100 kilometers north and south and 300 kilometers east and west. Our image of the whole moon is 10 meters resolution, and we hope to get a map of the whole moon.

It can be compared - the Chang'e-2 satellite weighs 2480 kilograms, and the Chang'e-1 satellite weighs 2350 kilograms. -- The Long March-3C carrier rocket launched Chang'e-2 has a total length of 54 84 meters, a take-off mass of 345 tons, and a carrying capacity of 3 8 tons. The Long March-3A carrier rocket launched Chang'e-1 has a total length of meters, a take-off mass of 240 tons, and a carrying capacity of tons; -- The rocket sent Chang'e-2 into a direct lunar orbit with an apogee altitude of nearly 380,000 kilometers, while the apogee altitude of Chang'e-1 was only about 5,100 kilometers; - Due to the different orbit design, Chang'e-2 can reach the Moon in about 5 days, which is much shorter than the 12-day lunar journey of Chang'e-1; - The orbit of the satellite around the moon is 100 kilometers, which is 100 kilometers closer to the moon than Chang Li Zhao'e-1; -- A newly developed camera on the satellite that can increase the resolution of images taken from Chang'e-1 from 120 meters to about 10 meters; - The design life of Chang'e-2 is half a year, the design life of Chang'e-1 is one year, and the actual life is 494 days, of which 482 days are around the moon; -- The total cost of the Chang'e-2 mission is about 900 million yuan, while the total cost of the Chang'e-1 mission is about 1.4 billion yuan.

The mission probes data about the moon, and Chang'e-2 is positioned as a backup satellite for Chang'e-1, which will be launched by a Chang-3B rocket. Its main mission is to conduct some key technical tests for the lunar landing of Chang'e-3 and conduct high-precision imaging of the landing area of Chang'e-3. Significance elevates the aerospace industry to a very high level, making it a "technology engine" industry. China can also attract companies from all over the world to invest in China, thereby boosting its economic development.

What is the origin of the name "Chang'e-1"?

The trajectory of the moon?

How is it unique to the Japanese "moon goddess"? Or not?

Chang'e's ultimate fate?

What can Chang'e do?

Can Chang'e come back?

Does Chang'e fight with the goddess of the moon? Who's amazing?

Chang'e's way of self-sufficiency?

Will Chang'e be able to continue to visit other planets?

How do you see Chang'e on Earth?

How long is Chang'e-1 sustened?

Will Chang'e-1 finally hit the moon to collect the lunar surface?

How long will Chang'e take humans to the moon?

The speed of Chang'e-1 is different at different times.

At 6:05 p.m. on October 24, 2007, China's first lunar exploration satellite "Chang'e-1" was successfully launched at the Xichang Satellite Launch Center.

1》Chang'e-1 launch speed (liftoff speed):

It is about 8 km/s (i.e. the first cosmic velocity is 7,800 m/s) and will gradually accelerate to the second cosmic velocity (about 11 km/s).

2》Chang'e-1 flight speed:

On 31 October, when the satellite entered the Earth-Moon transfer orbit, it flew at a speed of 10.58 kilometers per second and was more than 600 kilometers above the ground.

When the mid-course correction was carried out on the 2nd, the satellite's flight speed dropped to about 990 m/s.

At 11:15 on the 5th, the main engine of the Chang'e-1 satellite was ignited, and the first near-moon braking began.

According to estimates by the Beijing Aerospace Flight Control Center, less than 500 kilograms of fuel are left after the orbit change, experts said. These fuels are invaluable for sustaining the work that follows. According to the calculated data, Chang'e-1 will not be a big problem if it runs for another year.

At present, Chang'e-1 has a near-moon altitude of 420 kilometers and a flight speed of about 2,270 meters and seconds.

3》Speed around the Moon:

The minimum velocity of a satellite orbiting the moon is kilometers and seconds, which is the speed of Chang'e-1 around the moon.

In that satisfactory answer, the speech is wrong!

The textbook means that when something is thrown upwards from the ground, the velocity when it leaves the ground is there, and the book says the minimum launch speed; That is, the last arrow to fall is the velocity of the satellite, not "the velocity when it leaves the ground."