Sensis Corp., East Syracuse, N.Y., said its Airport Surface Detection Equipment, Model X system (ASDE-X) at Louisville (Ky.) International Airport is operational. The ASDE-X system uses a combination of surface movement radar, transponder multilateration and ADS-B sensors to provide an accurate picture of the location and identity of aircraft and vehicles on the airport surface. Also, the system detects and alerts controllers to potential aircraft and vehicle collision situations. FAA is in the process of deploying the ASDE-X system to 35 airports. With the addition of Louisville, the system is operational and commissioned at nine airports.