Can a localizer back course approach cause a false glide slope signal?
CAUTION: False glide-slope signals may exist in the area of the localizer back course approach, which can cause the glide-slope flag alarm to disappear and present unreliable glide-slope information. Disregard all glide-slope signal indications when making a localizer back course approach unless the approach and landing charts specify a glide-slope
What are the disadvantages of a side lobe antenna?
Another disadvantage is that confidential information may be picked up by unintended receivers. In receiving antennas, side lobes may pick up interfering signals, and increase the noise level in the receiver. The power density in the side lobes is generally much less than that in the main beam.
Which is the minima for ILS with or without glide slope?
LDA minima for with and without glide-slope (GS) is provided and annotated on the minima lines of the approach chart as S-LDA/GS and S-LDA Because the final approach course is not aligned with the runway centerline, additional maneuvering will be required compared to an ILS approach
How are the sidelobes different from the grating lobes?
In such a case, the sidelobes should be considered all the lobes lying between the main lobe and the first grating lobe, or between grating lobes. It is conceptually useful to distinguish between sidelobes and grating lobes because grating lobes have larger amplitudes than most, if not all, of the other side lobes.
What are the components of an instrument landing system?
The basic components of an ILS are the localizer, glide slope, and Outer Marker (OM) and, when installed for use with Category II or Category III instrument approach procedures, an Inner Marker (IM) The localizer (LOC) provides lateral course guidance during an approach to landing
Which is the most sensitive part of the ILS?
The glideslope portion of the ILS is even more sensitive. At the outer marker, each dot of glideslope deviation equals about a 50-foot excursion from the prescribed glidepath. At the middle marker, the sensitivity is an astounding eight feet per dot.