On the afternoon of the 6th, the Mount Everest 2020 mountaineering team set off from Mount Everest Base Camp at an altitude of 5,200 meters and set foot on the summit. At 19 o'clock on the 6th, the surveying mountaineering team reached the first stop, and the transition camp at an altitude of 5800 meters was recuperated. There are more than 30 members in this surveying mountaineering team, which is composed of professional mountaineers of the Chinese mountaineering team and surveyors of the first geodetic team of the Ministry of Natural Resources. At present, the basic measurement work of the periphery has been basically completed.
How many steps are there to reach the summit?
1 Depart from base camp and arrive at the middle camp of 5800 meters
On the afternoon of May 6, the summit of Mount Everest in 2020 began its summit operation. The survey team members set off from Mount Everest Base Camp at an altitude of 5200 meters, passing through Rongbu Glacier and East Rongbu Glacier, and will arrive at an intermediate camp at an altitude of 5800 meters.
2 Arrive at 6500 meters forward camp
After that, the survey team members will start from the middle camp and reach the forward camp at an altitude of 6500 meters. The oxygen in the camp is very scarce, and the altitude reaction is strong. The players need to take a rest here.
3 Via the Bei'ao Great Ice Wall to reach Camp No. 1 at 7028m
After the rest is complete, the survey team members will start from the forward camp, pass through the North Col Great Ice Wall at an altitude of 6600-7000 meters, and reach Camp No. 1 at an altitude of 7028 meters.
4 Passing the Dafengkou to reach Camp No. 2 at 7790m
Next, the survey team members will depart from Camp No. 1 and pass through the strong wind at an altitude of 7500 meters to Camp No. 2 at an altitude of 7790 meters.
5 Arrive at Camp No. 3 at 8300 meters
After that, the survey team members will depart from Camp 2 to Camp 3 at an altitude of 8300 meters.
6 After the second step of 8700 meters, the final impact on the peak
About a week later, the survey team members will take the opportunity to launch an impact on the summit of Mount Everest according to the weather conditions. The final impact needs to pass the second ladder at an altitude of 8680-8700 meters.
7 The target on the top of the peak is measured simultaneously with 6 intersections
After the summit, the survey team will set up a survey target on the top of Mount Everest, and carry out the work of global navigation satellite system survey and snow depth survey. At the same time, survey team members located at the 6 intersections of Base Camp, Zhongrongbu Glacier, and West Rongbu Glacier will aim at the peak target and carry out measurements simultaneously. In the end, scientists will calculate the new elevation of Mount Everest based on various data obtained by the measurement.
Why do people have to climb to the top to measure?
As the Mount Everest elevation measurement is about to enter the summit, many viewers also have many questions. The biggest question is, why must someone climb to the top to measure? Can I climb to the top by helicopter? Can satellites and drones complete such high-risk tasks? See the expert's answer.
Can satellite remote sensing images be measured?
Dang Yamin, leader of the 2020 Everest Height Measurement Technology Coordination Group : Satellite remote sensing images are currently mainly used for surface monitoring, but it can obtain some information on the location of the surface. But for now, its accuracy is still not enough. The height accuracy that it can obtain is about two meters. In addition, it also measures the height of the snow surface, because there is no artificial to go to the peak, it has no snow depth Measurement, so that it cannot be released as a very accurate result. So as far as the current situation is concerned, using satellite remote sensing images to measure Mount Everest is not enough.
Now, the elevation measurement of Mount Everest has realized the transformation from traditional geodetic technology to comprehensive modern geodetic technology. The professional surveying and mapping staff can make the measurement data more reliable and more convincing. In 1975, the Chinese mountaineering team reached the summit of Mount Everest. Although there were no professional surveyors at the time, the mountaineering team brought an important surveying instrument to the summit of Mount Everest. That is the target. This is also the first time in the history of human measurement that the target has been brought to the summit of Mount Everest. At that time, the surveyors selected 9 surveying sites from around Mount Everest, observing the horizontal and vertical angles of the target to determine the horizontal position of Mount Everest and the horizontal distance from each station to Mount Everest. According to the principle of triangular elevation measurement, the height of Mount Everest is calculated to be 8884.13 meters.
In order to measure the numbers more accurately, the survey team will also carry instruments such as snow depth radar and gravimeter to the peak, and these instruments require professional surveying and mapping personnel to perform the survey and operation.
Zhang Peng, Director of the Earth Department of the National Basic Geographic Information Center of the Ministry of Natural Resources: It takes a while to measure gravity, and then let it be measured by hand, which is actually very difficult. The first is to sit there carefully, and keep reading. In addition, it needs to be operated, so it is not easy to carry it back on top of (Mount Everest), and then it is even more difficult to carry out observation.
Can surveying team members reach the top by helicopter?
Dang Yamin, leader of the 2020 Everest Height Measurement Technology Coordination Group: Working on the top of Mount Everest requires very high helicopters. The survey team members must be put down, and the measurement equipment must be removed from the aircraft. Obviously, the place on the top of Mount Everest is very small, and the plane cannot be landed, it can only be in the process of movement. During the movement, the wind caused by the spiral of the aircraft may cause ice and snow to collapse.
Experts also said that the airflow at the summit of Mount Everest is unstable, how strong the wind, and the temperature is low. The measurement UAV is currently unable to fly on the peak, and currently has no experience of working at the peak of the robot.