drag the centre marker on the map or enter the location.
Lat and long may be specified as d.ddd, d m.mmm, or d m
s, either signed or NSEW. The radius is specified
in kilometres.
Enter the dates using a yyyy/mm format (e.g., 2012/06 for June 2012). If you omit the month, January is assumed for the start, and December for the end.
If Entire Period is checked, then the stations shown will have collected data for the entire date range. Otherwise, they will have operated for at least part of the period.
