What is glide slope?

Some articles on glide slope, slope, glide:

Optical Landing System - Components - Lights
... against which he may judge his position relative to the glide slope ... position of the aircraft with reference to glide slope ... The further the aircraft is from the glide slope, the further the ball will be above or below the datum lights ...
Visual Approach Slope Indicator - Types - Tri-colored VASI
... A tri-colored VASI is a single light that appears amber above the glide slope, green on the glide slope and red below it ... While on approach, the colour amber (above slope) can be seen at a very thin angle of approach between green (on slope) and red (below slope) due to the mixing of red and green which gives an amber ... Pilots not familiar with this may see the amber light and think they are above glide slope and then descend rather than make the proper correction and ascending back to glide slope ...
Sailplane - Glide Slope Control
... need some form of control over the glide slope to land the glider ... Glide slope is the distance traveled for each unit of height lost ... In a steady wings-level glide with no wind, glide slope is the same as the lift/drag ratio (L/D) of the glider, called "L-over-D" ...

Famous quotes containing the word glide:

    Novels so often provide an anodyne and not an antidote, glide one into torpid slumbers instead of rousing one with a burning brand.
    Virginia Woolf (1882–1941)