There are many more radars like Synthetic aperture radar, weapon control radar, guidance radar, weather observation radar, Doppler weather radar, target recognition radar and multi functioning radar. A special type of radar we use here is as airborne radar. They were initially developed for the detection of ships by long range patrol aircraft. Later, Airborne Early Warning (AEW) radars were developed to detect low-flying aircraft approaching a task force below the radar coverage of the ships antenna. The advantage of airborne platform in extending maximum detection range for air and surface targets is apparent when one considers that the radar horizon is 12nmi for a 100ft antenna mast compared with approximately 195nmi for a 25,000ft aircraft
1.1) Explain the principles of operation of the aircraft radar systems with appropriate block Diagrams and pictorial representation. (Assessment Criteria 4.1) Radio detection and ranging is an electromagnetic sensor used for detecting, tracking, locating and recognizing objects of various types at considerable distance. Radar operates by transmitting electromagnetic energy to objects commonly referred to as targets and observing the echoes of target which returns back. The target may be aircraft, spacecraft and astronomical bodies, or even like birds and rains. And finds the presence, location, and velocity of such objects and radar can find their size and shape as well.
The scope of the RFID research fields will be narrowed down for purposed of developing Radio Frequency (RF) front-end reader antenna. But, there are some constraints in term of facilities to design, develop and measure the proposed antenna. The antenna will be designed at UHF and ISM band for RFID reader. Since antenna is designed below any design antenna size becomes bulky and huge. For that reason, the proposed antenna is suitable for fixed-point RFID antenna application.
To fully understand the technical terms and relevant topics related to the project, a literature review was done. In this section, a brief summary of it is presented. Antenna Basics Polarization The polarization of an antenna is described by the time-varying direction of an electromagnetic wave and the relative magnitude of the vector of the electric field. There are three kinds of polarization: linear polarization, circular polarization and elliptical polarization. Linear polarized electric field can possess both horizontal and vertical orientation.
For the wideband antenna, it is important to stabilize the radiation patterns over the whole operating band. With the electric size varying large, the radiation patterns could be distorted seriously in wide band. Some wideband antennas had achieved large impedance bandwidth in the literatures [P. Li, G.Marchais, S.W. Qu, L. Li, J], but the available bandwidth of antennas of these wideband antennas were often limited by their distorted radiation pattern in spite of its large impedance bandwidth. To achieve large impedance bandwidth with stable radiation patterns, Quan Xue et al.
The parabolic dish can be made by cutting flate sheets and then bending it into the shape of parabola. Old satellite dish also can be used for this purpose. 2.1.2 Reflective surface: The reflective material is to be attached in the face of the parabola so that the direct sunlight coming from the sun can be reflected to the receiver. Material with high reflectivity have to be used for this purpose. Reflectivity of potential reflectivity is given below Material Reflectivity,
To accurately predict rainfall, the cloud status and sky status must be known. Previously many techniques of image processing have been carried out successfully. Image processing techniques can be used to measure the cloud, sky, rain status. Rainfall being an important part of agriculture helps in productivity of various vegetables, fruit, flowers etc. Some of the products of flower, crop, and vegetables are exported.
A climatologist will study the change in temperature by using records and data to create a climate graph. The scientist will predict future temperatures for different regions of the United States (Drought for Kids). Over the long and short period of time temperature and weather has played a big role in everyday life. People will mostly think they are the same thing because they are so much identical. But in reality the aspects of climate and weather can be different.