glide path

…The left side of the approach direction is modulated at 90Hz, and the right side is modulated at 150Hz, and the radiated electric field is set so that the modulation depth of both is equal at the center line. As the aircraft shifts to the left or right, the modulated signal becomes stronger, and the degree of displacement is indicated on the on-board instruments. (2) The glide path, also called the glide slope, indicates the appropriate approach angle. It is installed near the runway's touchdown point (usually 300m from the front end of the runway), and the radiated electric field of directional microwaves of 328.6 to 335.4MHz forms an approach path that is usually 2.5 to 3 degrees above the touchdown point. …

*Some terminology explanations that mention "glide path" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…進入方向に対し左側が90Hz，右側が150Hzで変調されていて，中心線部分で両者の変調度が等しくなるように放射電場が設定されており，左右にずれるに従い変調信号が強くなり機上の計器上に変位度を示す。(2)グライドパスglide pathはグライドスロープglide slopeとも呼ばれ，適切な進入角を示す。滑走路の接地点付近(通常滑走路手前端から300m)の傍らに設置され，328.6～335.4MHzの指向性マイクロ波の放射電場により，接地点より通常2.5～3度上向きの進入路を形成する。…

※「glide path」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報