Without the weather forecast, how did the ancients predict the sky through the sky?

1. In ancient times, there was no weather forecast. People judge the predictable weather according to some precursors of rainfall and some experiences they have summarized. Also, Zhang Heng of the Eastern Han Dynasty invented the earliest anemometer in the world, which can predict the weather according to the change of wind direction.

Second, peas move and ants move, which is a precursor to rain. The wife is not to be outdone. When the wife copied it. Ancient meteorological bureau. It is very important to talk, observe the sky and calculate our daily life, such as agriculture, transportation and even our food, clothing, housing and transportation. Zhang Heng, an astronomer in the Eastern Han Dynasty, invented the world's first anemometer-the copper bird facing the wind, and a "person" slept beside him. Swallows fly very low, frogs scream, it rains, and there is a thunderstorm on the ground.

Third, the weather can also be predicted according to the wind. "The east wind is wet and the west wind is wet", "Autumn is early and frost is late, and the cold dew is just then" and so on: the weather is unpredictable. Therefore ... Jin people changed Zhang Heng's bronze bird into a wooden bird, so they wrote a word and sent it back. With the development of science and technology, more and more meteorological instruments have been established, and meteorological stations have been established all over the country.

Fourth, the current weather forecast is no longer empirical. However, according to the cloud image sent back by Fengyun-1 meteorological satellite and the weather, air pressure, wind direction, wind speed and other data measured by the local meteorological observatory, through relevant data and experience. This prediction has always been made manually, and this method is slow and inaccurate. No wonder some people say: the weather forecast is for reference only, I can't believe it, I can't believe it.

In order to forecast the weather accurately, the data obtained above must be listed as hundreds or even higher order linear equations. If it is solved manually, it will take hundreds of people to complete it in a few weeks. It is no longer a weather forecast, but a weather forecast. Now that there are electronic computers, the work is done by computers. It only takes a few minutes to finish this task.