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我们在上期动手测量中介绍了时间、真太阳时、平太阳时、世界时、区时、地方时等概念,也介绍了测量真太阳时的方法。希望同学们都能够跟上进度,认真地进行了测量,获得真实的测量数据。在这一期里,我们要帮助同学们验证自己的测量结果。由于我们测量时用于计时的手表、手机等计时工具使用的时间都是平太阳时的区时,而我们测量的结果是地方真太阳时,为了把时间统一起来,我们必须做两件事情:一是把区时换算成测量地的平太阳时里的地方时;二是把平太阳时里的地方时换算成地方真太阳时。
We introduced the concepts of time, true sun, flat sun, world time, region, local time, etc., in the hands-on survey of the previous period, and also introduced methods for measuring real sun. Hope that students are able to keep up with the progress, seriously measured, obtain real measurement data. In this issue, we want to help our students verify their measurements. Since the timekeeping tools such as wristwatches and cell phones used in our measurement are all in the flat sun, and the result of our measurement is that when the real sun is in place, we must do two things in order to get the time together: First, when converting the area into a measured place in the flat sun, the second is to convert the place in the flat sun into a real sun.