中文说明：我写的一个地震单台定位的程序，可以输入初至和P波和S波的到时差就可以计算出震中，然后输入台站的经纬度就可以得到震中的经纬度
English Description：
I wrote a program for single station positioning, which can input the arrival time difference of first arrival and P wave and S wave to calculate the epicenter, and then input the longitude and latitude of the station to get the longitude and latitude of the epicenter