Page 153 - Planning and Design of Airports
P. 153
Purple light Outer marker beacon 0.7° 0.7° 3.0°–6.0° 3° above horizontal (optimum)
Middle marker beacon Localizer modulation frequency
Amber light
Glide slope modulation frequency
Point of intersection, runway and glide path extended 200 ft (60 m) 4–7 mi (6–11 km)
Localizer array Glide-slope array guration.
3000–4000 ft (900–1200 m) ILS system confi
FIGURE 3-16
121
