GPS DriftCast was created out of a desire to understand where rockets could potentially land leading up to a launch. The goal being to help avoid ending up in hazardous areas. It combines flight characteristics from simulations with wind forecasts to estimate a rocket's final location. A range of up to 12 hours allows targeting launch times with friendly wind.
Estimated landing locations are displayed on a static map image. Additional details can be viewed in Google Earth by downloading KML files.
GPS DriftCast began as an Excel spreadsheet created by Dave Snyder. He shared it on The Rocketry Forum incorporating additional features suggested by other forum members.
This website was written by David Bellhorn. It is a complete re-write attempting to duplicate as much functionality as possible.