Inverse synthetic aperture radar (ISAR) technique is a radar imaging method used to generate high-resolution images of moving targets, such as aircraft or ships. Unlike traditional synthetic aperture radar (SAR), where the radar platform moves to create an aperture, ISAR uses the movement of the target itself to achieve resolution enhancement. ISAR works by exploiting the Doppler effect caused by the relative motion between the radar system and the target.
This movement causes variations in the Doppler frequencies of the radar return signals, which are then processed to create detailed images that reveal the shape, size and structural characteristics of the target.
Inverse synthetic aperture radar (ISAR) works by collecting radar returns from a moving target over a period of time. As the target moves, different parts reflect radar signals with varying Doppler shifts due to their different speeds relative to the radar system. These Doppler shifts are recorded and processed to create a high-resolution image of the target.
The radar system efficiently synthesizes a large aperture by integrating echoes received from different aspects of the moving target’s surface, thereby improving the spatial resolution of the resulting image. ISAR is particularly useful for surveillance and reconnaissance applications where detailed imaging of moving objects is critical.
The full form of ISAR is inverse synthetic aperture radar. This radar imaging technique is widely used in military and civilian applications to generate high-resolution images of moving targets.
ISAR exploits the relative motion between the radar system and the target to achieve imaging capabilities that can resolve fine details, even when the target is moving. This technique is crucial in scenarios where capturing detailed information about moving objects, such as ships, aircraft or ground vehicles, is essential for situational awareness, target identification and mission planning
