Astronomy & Space Sciences
Title : | Investigation of Doppler Keystone Transform (DKT) for Range Migration Correction (RMC) of a moving space debris target at LEO Orbit |
Area of research : | Astronomy & Space Sciences |
Focus area : | Radar Signal processing |
Principal Investigator : | Dr. Shivani Verma, Associate Professor, Amity Institute of Space Science and Technology, Amity University, Noida, Uttar Pradesh |
Timeline Start Year : | 2023 |
Contact info : | sverma2@amity.edu |
Details
Executive Summary : | Pulse coherent tracking radar determines the range to a target using the pulse timing techniques and uses the Doppler effect of the returned signal to determine the target object's velocity.
In Range-Doppler processing, the target is assumed to stay in the same range bin during the coherent processing interval (CPI) and a Fourier transform along the slow-time dimension is used to focus the target signature. Range migration occurs when the target passes into multiple bins over the CPI. As a result, the Doppler signature of a target smears in both range and Doppler domains.
Combined with the wide bandwidth, the long CPI, and the high radial velocity between the target and the radar, this combination of factors causes significant linear range migration over the CPI. With range migration accumulated from profile to profile, range profile alignment is destroyed which results in the degradation of the coherent integration gain. Therefore, migration compensation must be considered. Keystone Transformation proposed to correct the range walk(the linear component of the range migration) and it is combined with the Doppler phase compensation to image the moving target. Keystone transform in Pulsed Doppler radar to remove the range migration effect and improve the performance of detection. |
Co-PI: | Shri Rishabh Agrawal, ISRO Telemetry, Tracking and Command Network (ISTRAC), ISRO, Bengaluru, Karnataka |
Total Budget (INR): | 13,82,568 |
Achievements : | The project being undertaken by ISRO in collaboration with academia is directly or indirectly beneficial to the society. |
Organizations involved
Implementing Agency : | Amity University, Noida, Uttar Pradesh Funding Agency : | Indian Space Research Organisation (ISRO)
Department of Space (DOS)
| Source : | Indian Space Research Organisation (ISRO)- Department of Space (DOS) 2022-2048 | |
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