AEROSPACE

Tracor to Buy GDE Systems: The company said it agreed to acquire another defense electronics concern, San Diego-based GDE Systems Inc., from an investor group led by the Carlyle Group for cash and securities totaling $98 million. GDE, which was once part of General Dynamics Corp., also has interests in high-resolution satellite remote imaging technology in a venture with Litton Industries and Orbital Sciences. Tracor Inc., based in Austin, Tex., said GDE will remain headquartered in San Diego, where it employs 1,300 people.