What is the radio altimeter theory of operation?
Description. Early radio altimeters determined altitude by measuring the time between transmission of a radio signal from the aircraft and reception of the reflected signal. Modern systems use other means, for example, measurement of the change of phase between the transmitted and reflected signal.
What is the frequency of radio altimeter?
Radio altimeter/radar altimeter — Airborne electronic devices capable of measuring the height of the aircraft above the terrain immediately below the aircraft. They operate in the 4.2–4.4 GHz band.
What is the maximum altitude covered by radio altimeter?
5,000 ft
Using Frequency Modulated Continuous Wave techniques (FMCW), radio altim- eters provide a continuous indication of height above the surface immediately be- low the aircraft, up to a maximum of 5,000 ft, with 2500 ft as the most common range.
What is the principle of altimeter?
An altimeter is a device used in aircraft to measure its altitude. Principle: Atmospheric pressure decreases with the increase in height above the sea level; therefore, a barometer measuring the atmospheric pressure can be used to determine the altitude of a place above the sea level.
How do you use an altimeter?
The altimeter measures the height of an aircraft above a fixed level. The instrument senses this by taking the ambient air pressure from the static port. That air is plumbed through the back of the panel and into the back case of the altimeter. Inside the altimeter is a sealed disc called an aneroid, or bellows.
What’s the name of the next generation Boeing 737?
The Boeing 737 Next Generation, commonly abbreviated as 737NG, or 737 NextGen, is the name given to the −600/-700/-800/-900 series of the Boeing 737 airliner. It is the third generation derivative of the 737, and follows the 737 Classic (−300/-400/-500) series, which began production in the 1980s.
What kind of Radio is on a Boeing 737NG?
Boeing 737NG Radio Equipment When considering the radio equipment installed on a typical airliner, there are two strong driving factors. Operators doing considerable overseas flying often have satellite communications installed, and tend to select either Inmarsat or Iridium communications services. The second driving factor is cost.
When does the Boeing 737NG call ” 500 “?
For instance, if the F/O’s RA is slightly off, and passes 500ft before the captain’s RA, does the aircraft call “500” when the first (in this case the F/O’s RA) RA passes that altitude, or is it always based on the captain’s RA?
What’s the difference between a 737 and a 737NG?
Formally launched in 1993, the 737NG is an upgrade of the preceding 737 Classic models featuring a redesigned wing that is larger in area, with a wider wingspan, and greater fuel capacity. It is equipped with CFM56-7 series engines, a glass cockpit, and features upgraded and redesigned interior configurations.