Abstract
While designing any radar, it is necessary to have an understanding of the main issues that include evolvement of the radar, analysis of component parts, and interpretation of the composite outcome in a way that becomes an operational tool. This chapter describes typical radar architecture to explain the radar fundamentals. Radar is essentially an active electromagnetic surveillance. The basic function of radar is to transmit a burst of electromagnetic energy necessary to allow detection of targets intercepting the energy by its receiver. The applications of particular radar determine its limit of operation. Laser radar combines the capabilities of conventional radar and optical systems to achieve high resolution and accurate target tracking, imaging, aim-pointing assessment, and autonomous operation. By combining laser radar systems with passive sensors, further improvement can be gained in target estimation and precision independent of time of the day or night. Other radar usage includes (1) strategic and tactical surveillance, (2) remote atmospheric and sea-state sensing, (3) tracking and guidance, and (4) precision disaster control or monitoring.
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