China News Agency, Beijing, May 6 (Ma Shuisha, Geng Yan, Li Jiawei) According to the China National Space Administration's Lunar Exploration and Aerospace Engineering Center on the 5th, it is expected that in the middle and late July, the northern hemisphere of Mars will enter the coldest season of the year. At present, the highest temperature at noon where the "Zhurong" rover is located has dropped to minus 20 degrees Celsius, and the ambient temperature at night is as low as minus 100 degrees Celsius. Sleep and other working modes.

　　At present, the area where the "Zhurong" rover is located has entered winter, which is similar to that of the earth. After entering winter, the altitude angle of sunlight in the northern hemisphere area decreases and the duration of illumination shortens.

　　According to the measurements, the local maximum temperature at noon on the rover has dropped to minus 20 degrees Celsius, and the ambient temperature at night is below minus 100 degrees Celsius.

In addition, due to the presence of sand and dust weather, the light intensity is further weakened, which affects the power generation capacity of the solar wing battery array of the Mars rover.

Recently, the engineering team adopted the rotation of the solar wing to adjust the light angle, reduce the daily work items and time, and achieve energy balance.

　　It is understood that Mars' rotation period and rotation axis inclination are close to those of Earth. A Martian day is only about 40 minutes longer than Earth's, and the rotation axis inclination is 25.19 degrees. Therefore, Mars, like Earth, has day and night alternations and seasonal changes.

The orbital period of Mars is about 687 days, or 1 Martian year is equivalent to 1.9 Earth years, which means that the average duration of each season on Mars is about twice as long as on Earth.

　　When the "Zhurong" first landed last year, Mars moved to the vicinity of the aphelion, and the direct sunlight point was in the northern hemisphere. The northern hemisphere of Mars has just entered summer and the southern hemisphere has entered winter.

Now, it has been nearly a year since the "Zhurong" landed on Mars. Mars is running near the perihelion, and the direct sunlight is in the southern hemisphere. The northern hemisphere where the "Zhurong" is located is entering winter and the southern hemisphere is entering summer.

　　In the next two months, the direct sun point will continue to move to the south of Mars, reaching around the Tropic of Cancer around mid-to-late July, when Mars' northern hemisphere will enter the coldest season of the year.

In order to safely survive extreme weather such as Martian winter and sandstorms, the "Zhurong" rover has designed working modes such as autonomous sleep. When the energy is reduced to a certain level, it will automatically enter the sleep mode. After the environmental conditions gradually improve, it will return to normal. Operating mode.

　　As of May 5, the "Tianwen-1" orbiter has been in orbit for 651 days and is 240 million kilometers away from the earth. The "Zhurong" rover has worked on the surface of Mars for 347 Martian days, and has traveled 1,921 meters in total. Getting about 940GB of raw scientific data, running fine.

　　During the ring fire, the seven payloads carried by the "Tianwen-1" orbiter were all powered on, and continued to carry out global remote sensing exploration of Mars.

The "Zhurong" Mars rover will continue to carry out the expansion inspection and exploration mission after completing the 90 Mars day inspection mission on August 15, 2021.

　　The Lunar Exploration and Space Engineering Center of the National Space Administration released three images of Martian landforms on the 5th. They are the images of the Martian Triole crater with a resolution of about 0.8 m/pixel taken by a high-resolution camera on April 17. The "seasonal slope pattern" on the crater wall; the local landform image of the Martian Mariner Valley captured by the medium-resolution camera on April 1, with a resolution of about 65 m/pixel; the impact on the surface of Mars captured by the Navigation Terrain Camera on April 10 Image of rocks distributed near the pit.

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