Abstract:

A joint SAR imaging algorithm with Doppler ambiguity removal is proposed, which can be used for high resolution wide swath SAR imaging in low pulse repetition frequency(PRF) for distributed micro-satellite constellation. The algorithm is capable of correcting the vertical baseline effectively, not only for the range-invariant component and range-variant component, but also for the phase related to residual baseline in vertical combined with Doppler ambiguity removal. Consequently, the Doppler ambiguity can be removed as completely as possible. Moreover, the algorithm precision is also analyzed to support its potential in real application. Finally, simulated data experiment is designed to validate the proposal.