Step 1: Please select a point in the map by click the mouse.
the longitude and latitude you just selected will be shown under the map.
You can modify the coordinate by typing later.
Step 2: Type in a time period.
The format is: YYYY.MM.DD.hh.mm e.g. 1999.11.02.13.20 means:
Year(1999),Month(11),Day(02),hour(13),minute(20)
Step 3: Click the "submit" button