Out of the cabin activities, also pay attention to "window"

When the astronauts perform the flight task, they will launch an off -cabin activity in a timely manner according to the task. In order to ensure the safety of the life of the astronauts and the success of the task, the choice of the outlet activity window is very important. The selection of the spacemen's outlet event window can be divided into two stages. The first is the choice of macro -time window based on task needs and guarantee conditions. This requires a comprehensive consideration of various factors and conditional constraints such as space station energy constraints, space environment, meteorological conditions, and heaven and earth work interest.

Energy constraint

During the flight during the sky and core cabin, considering the safety of the motion path of the robotic armcase, during the outlet event, the sun rows will be set to zero to zero, and no longer follows the sun.

During the flight of the core compartment and the questioning of the test compartment, the energy required by the two cabins was supplied by their respective solar windsurfing, respectively. When the outcomes are supported by the small robotic arm of the Tianshi experimental cabin, the core cabin sunroof is not affected, and it can follow the solar rotation guarantee core compartment energy supply normally; The antenna communication and comprehensively considering the safety of the small robotic arm movement path, you will set the questioning of the Sky Experimental Curdine Sunwak to zero, and no longer follow the sun.

In other words, due to the setting of the solar windsurfing, it is necessary to ensure the energy supply within the appropriate solar angle range, so it is restrained to the selection of the cabin activity window.

After the three -cabin energy network of the space station, the solar windsurfing of the non -exit work capsule can be used to ensure the energy supply of the space station platform. At that time, the selection of the outlet event window will no longer be subject to energy constraints.

Spatial environment

Under the premise of meeting the energy constraints of the space station, the selection of the outlet activity window must consider the impact of the spatial radiation environment on the astronauts, and analyze the outlet activity window according to the space environment forecast. Combined with the prediction of the probability of the solar proton incident and the probability of geomagnetic outbreaks to avoid spatial weather events; according to the characteristics of the South Atlantic abnormal area, combined with the actual situation of the shielding capacity of the overseas space service in my country, comprehensively analyze the monitoring and forecast conditions, and further run the track in the space station combination. Analyze and make suggestions for the outlet event window.

Weather condition

During the outlet event, the relay satellite provides support and control communication support. Due to the large amount of relay transmission data, if it is affected by rain and decay during the transmission process, it will lead to interference in the heaven and earth communication. Therefore, when selecting the outlet activity window, the meteorological forecast results need to be referred to.

Heaven and earth

In the Chinese space station, about every 90 minutes will go through a round of day and night alternation. In order to facilitate the development of heaven and earth work, it is necessary to comprehensively consider the physical condition of the astronauts and the synchronization of the heaven and earth. Both astronauts and ground supporters can implement the outlet activities in the best state.

If multiple out -of -the cabin activities are implemented, the spacemen need to reserve a full rest and recovery time, the necessary training time of the orbit, and the preparation and preparation of out -of -class operating equipment, the replacement of off -spaces and consumables for off -computers, etc. Essence

In addition, the choice of the outlet window must also consider accidents such as temporary disposal during the preparation of the outlet, and reserve a reasonable backup window in advance to cope with the possible outpatient delay.

Carrying out off -cabin activities and implementation of off -cabin operations are becoming the normal flight task work at the space station stage. Chinese astronauts will carry out more and more complicated outlet activities to provide strong support for the smooth completion of the construction and stable operations of the space station.

Extended reading

Solar proton incident: When a large number of high -energy particles (mainly protons) erupted by the solar explosion activity arrived near the earth, the proton flux of the energy greater than 10MEV exceeded 10pfu, indicating that the solar explosion activity had a strong proton flow. Proton event.

Geomagnetic Storm: When the sun broke out, the daily coronal material was thrown and carried a large crown plasma plasma and magnetic field to interact with the earth's magnetic layer, especially the south -directional magnetic field they carried can trigger geomagnetic storms. The changes in atmospheric density caused by geomagnetic storms can cause a significant increase in the height of the space station track, which cannot be ignored.

Southern Atlantic abnormal zone: South Atlantic Anomaly (SAA) is a negative in the South Atlantic (between Africa and South America) with a negative more than 200km in the south (between Africa and South America) located at 0 ° ~ 60 ° ~ 50 ° south latitude. The magnetic district area, radiation is significantly higher than other areas of near -near orbit. It is an important ionizing radiation environment for near -ground orbital manned aerospace. The outlet activities should avoid SAA as much as possible. Its core position is about 35 ° east longitude and 35 ° south latitude, drifting towards the northwest at a certain rate. The area range is related to height. As height increases, the range of SAA increases. At the same height, SAA is divided into level 4 according to the low and high sequence of prototype. The longer the window period), the longer.

Rain decay: Rain decay refers to the absorption and radiation of raindrops after the radio waves pass through the rain drops. The occurrence of attenuation is one of the factors that affect the quality of the transmission of satellite communication systems and system performance.

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