| 摘要 |
PURPOSE:To know the time relating to sunshine, by correlating the time relating to sunshine with a date, the latitude and longitude of a geographycal position and the longitude of the standard meridian and applying calculation processing to these coefficients rationally and effectively. CONSTITUTION:A city indicating means 5 and a date indicating means 6 are provided and a function, which calls out the standard meridian data signal, longitude data signal, latitude data signal, equation-of-time data signal ant right ascension of an indicated city from a memory part, is mounted. The time relating to sunshine is calculated by the above-mentioned called-out signals to be displayed on an analogue display zone 15. |
