Patent Number: 6,293,488

Title: Coordinate transformation system

Abstract: A coordinate transformation apparatus (138) in an aircraft-based missile guidance and tracking system for adjusting aircraft and missile position signals for a roll angle about the line of sight in the guidance and tracking system sight unit (40) caused by roll of the aircraft subsequent to firing of the missile. The apparatus (138) incorporates analog to digital converter means (140), (144), (156), (160) and (180) to convert the analog aircraft and missile position signals to digital signals for input into a microprocessor (168). The microprocessor (168) computes the roll angle as well as a change in roll angle over time around the line of sight of the sight unit (40) and subsequently adjusts the digital signals to compensate for the computed roll angle and change in roll angle. Digital to analog converter means (182), (186) and (190) convert adjusted digital signals to analog signals and output the adjusted analog signals for computation of missile guidance signals by the system.

Inventors: Wells; Michael L. (Newhall, CA), Jenkins; Thomas E. (Los Angeles, CA), Sand; Richard J. (Torrance, CA), Sutton; Eric B. (Los Angeles, CA)

Assignee: Raytheon Company

International Classification: F41G 7/30 (20060101); F41G 7/20 (20060101); F41G 007/00 ()

Expiration Date: 09/25/2018