... at a ofixed elevation angle. A 68HC11 microprocessor automatically compensates for variations in ambient lighting and sensor temperature, and reports range, bearing, and elevation data via an ... landmarks are needed for a given travel distance.3. Many mapping and landmark matching algorithms (for example: [Gonzalez et al., 1992;Chenavier and Crowley, 1992]) assume that the robot can ... France [Vaganay et al., 199 3a; 1993b],Barshan and Durrant-Whyte [1993], and the University of Michigan [Borenstein, 199 4a] indicatethe inertial navigation approach is not realistically advantageous...