What solar terms are suitable for spacecraft launch?

Not necessarily the solar terms, but the weather. Sunny, partly cloudy and windless conditions are the best.

The launch of spacecraft is subject to five meteorological conditions:

1. Low temperature. 19861On October 28th, the American space shuttle Challenger exploded and disintegrated at an altitude of about14000m, killing all seven astronauts on board, which caused the biggest tragedy in the world space history. The after-the-fact investigation Committee pointed out that the direct cause of the accident was the failure of the O-ring seal, and the "murderer" who caused its failure was the low temperature on the ground.

2. Lightning. Spacecraft may be shattered when struck by lightning, and static electricity generated by friction with ice crystals and water droplets in the atmosphere is also very dangerous. Rockets in the United States and France have been blown up in the air due to lightning interference.

3. Rainfall. When raindrops hit the space shuttle at the speed of 1600 km/h, they will break the shell insulation tile, making it unable to resist the shell temperature of 700℃ or even higher. At the same time, water droplets will weaken and scatter radio waves, which is extremely unfavorable to the flight of ground-based remote-controlled spacecraft.

4. Strong wind. Before ground launch, strong winds may damage the rocket when it hits the launcher. During the launching process, strong winds can easily make the rocket fly out of control and cause accidents. For example, when the American space shuttle Challenger had an accident, two rapids at high altitude induced strong turbulence.

5. Cloud. When the high-altitude spacecraft returns to the atmosphere, it is unpowered and glides by kinetic energy. If the height of the cloud bottom is less than 3000m, or the visibility is poor, once there is an error in the automatic navigation system, it may cause irreparable tragedy because it is too late to correct it.