Radar Displays

To preserve the reflection signal, a long decay phosphor is required. The phosphors used in the past were generally composed of two phosphors, one with a long decay. Thus, the screen exhibits two colors, that of the target and the other forming the background which is refreshed in every 360 ° rotation of the radar antenna. Radar phosphors include  

P-7 ZnS Ag -I- ZnCdS2 blue + yellow med.(57ps)-i- long(400ms) 

P-14 ZnS Ag -i- ZnCdS2K3u blue + orange short(27ps)-i-v.long(500ms) 

P-17 ZnS Ag -H ZnCdS2 ki blue + yellow short(5.2ps)+v.long(429ms 

All of these were given in Table 6-2 of the last chapter. More recently, digital technology has replaced this type of CRT using long decay phosphors. A computer-controlled display utilizing a full color CRT has been developed for aircraft traffic control. Therein, the direction, size of target and altitude of aircraft are directly displayed upon the phosphor screen. 

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Thomson observed a glowing beam that came out of the cathode and struck the anode and the nearby glass walls of the tube. So, he called these rays cathode rays. The glass tube Thomson used is known as a cathode-ray tube (CRT). CRTs have become an important part of everyday life. They are used in television sets, computer monitors, and radar displays. 

Radar display =16 Fl dng spot scanner = 8 Storage monitor = 1 Light pen on display = 1... 

Radar. Types of cathode-ray tube radar display. 

The liferaft echo and disturbances from waves visible in the navigational radar display, on board a ship is presented in Figure 4. 

Figure 4. Radiolocation signal—radar echo of a liferaft and disturbances from waves presented in the navigational radar display on board ship.

An assembly is an integrated set of components and/or subassemblies that comprise a defined part of a subsystem, for example, the pilot s radar display console or the fuel injection assembly of an aircraft propulsion subsystem. An assembly can also be composed of a number of parts, subassemblies, or any combination thereof joined together to perform a specific function and which can be disassembled without destruction of designed use (i.e., they can be reassembled). Typical examples of assemblies are power supplies, memory boards, switching devices, and so on. An assembly would be reflected as a specific level in a system hierarchy. 

Assembly—an integrated set of components and/or subassemblies that comprise a defined part of a subsystem, for example, the pilot s radar display console or the fuel injection assembly of an aircraft propulsion subsystem... 

Search-and-Rescue Transponder (SART) devices. These devices are used for locating survival craft or distressed vessels by generating a series of dots on the rescuing ship s radar display. 

The second functionality, available in the lower part of the window, is dedicated to the adjustment of the weather radar orientation (Tilt angle). This can be done in an automatic way or manually (Auto/manual buttons). Additionally, a stabilization function aims to keep the radar beam stable even in case of turbulences. The right-hand part of Fig. 1 presents an image of the controls used to configure radar display, particularly to set up the range scale (right-hand side knob with ranges 20, 40,. .. nautical miles). 

Fig. 1. Image of a) the weather radar control panel b) of the radar display manipulation...

Fig. 2 shows screenshots of weather radar displays according to two different range scales (40 NM for the left display and 80 NM for the right display). Spots in the middle of the images show the current position, importance and size of the clouds. 

At Novartis, so-called BioavailabiUty Radar Plots [44] are used to visually display the oral absorption potential of molecules. On these plots five important calculated descriptors (log P, molecular weight, PSA, number of rotatable bonds and water solubility score [45]) are displayed on the axes of a pentagonal radar plot and compared with predefined property limits (green area) which were determined by the analysis of marketed oral drugs. These plots provide an intuitive tool that displays multiple parameters as a single chart in a straightforward but informative way, providing visual feedback about the molecule s bioavailabiUty potential (Fig. 5.5). 

In construction, a radar tube corresponds to the oscilloscope tube. It displays radar echos, i.e., the direction of and the transit time to and from a reflecting object. 

Radar devices in their most elementary form consist of an oscillator which produces electromagnetic radiation, a wave-guide that carries it to the antenna (which beams the waves and collects returning echoes), a receiver which selects and amplifies the echo, and a display or signal unit which makes the data available in the required form (Ref 1)... 

Many organizations rely heavily upon the use of a D-Meter. A D-Meter is a relatively inexpensive handheld digital display ultrasonic thickness gauge for determining the remaining thickness of vessel walls and piping. Ultrasonic wall-thickness measurements resemble radar or sonar in technique. A burst of ultrasound is emitted via a probe into a material and bounces off the rear wall. The time interval measured for this reflection to return is a measure of wall thickness. 

On the basis of the field-effect studies the authors and colleagues at the Royal Signals and Radar Establishment (RSRE), -Malvern, proposed in 1976 the use of a-Si H field-effect devices in the addressing of liquid crystal matrix displays, as an alternative to the thin-film CdSe transistors which had... 

Using all pertinent evolutionary trends, the team prepares a radar chart to depict its planned innovation. In doing so, the team expects it can move up one notch on the evolutionary scale for each of the two identihed trends. In the case of surface segmentation, the new design will move from a line to a two-dimensional curve. As for the geometric evolution of linear constructions trend, the team calculates that it can move from a surface with two-dimensional protrusions to one that displays three-dimensional protrusions. 

In addition to these tools, other tools are available to help track the status of potential risk events over the course of a project. One such tool. Risk Radar, was designed to help managers of software-intensive development programs. Regardless of the intended target audience, this tool can be quite helpful for any type of project risk-tracking effort. With the proper input of risk data, it displays a... 

A 100 element 360° scanning sonar transducer utilizing PVDF has been developed by Marconi to provide a 360° view of the acoustic scene on a radar type display. Hydrophones for submarine recotmaisance are of great interest to the military. A comparison between PVDF and a ceramic material PZT-4 commonly used in sources of pressure is shown in Table 5.12. The so-called g-d product, which is considered to be the standard of suitabihty for hydrophone apphcations, is 2.5 times greater for PVDF as... 

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