This simple application shows how to use the methods of the GPS satellite outage web service. Select a GPS PRN number from the drop down and press the "Find Outages for PRN" button to see all outages for that PRN. Specify a start and stop date and press the "Find Outages for Time" button to see all outages during that time interval. Or, Specify both a PRN and a start and stop time to see outages for that PRN during that time interval by pressing the "Find Outages for PRN and Time" button.