Design and Implementation of China-VO Ephemeris Computing Service Based on Web Services

In order to overcome the complex and time-consuming ephemeris computation, we design an ephemeris computing platform called the China-VO Ephemeris WS for ephemeris programmers and researchers with the new techniques of JNI and Web Service, which is based on the precise, long time span and enriched Swiss Ephemeris function package. Then we introduce the way to use the China-VO Ephemeris WS, drawing the central eclipse chart, for example.