2 May 2016 S-band synthetic aperture radar on-board NISAR satellite
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Abstract
provide single, dual, compact and quasi-quad polarization imaging modes. Centre frequency for S-band SAR is 3200MHz with highest bandwidth of 75MHz. S-Band SAR utilizes 24 transmit receive modules (T/R Modules) to illuminate >240kms swath during transmit event and digital beam forming (DBF) on receive to reduce data rate by combining 24 receive channels and enhance SNR of the system. This paper provides details of S-band SAR system design, configuration and realization which is a challenging task since both L-band and S-band radars need to operate at same PRF and clock reference during simultaneous imaging operation. Further to this, SweepSAR technique demands PRF dithering (changing) to avoid dead gaps in the swath due to receive echo conflicting with transmit event.
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Tapan Misra, Tapan Misra, Rakesh Bhan, Rakesh Bhan, Deepak Putrevu, Deepak Putrevu, Priyanka Mehrotra, Priyanka Mehrotra, Soumyabrata Chakrabarty, Soumyabrata Chakrabarty, } "S-band synthetic aperture radar on-board NISAR satellite", Proc. SPIE 9881, Earth Observing Missions and Sensors: Development, Implementation, and Characterization IV, 988107 (2 May 2016); doi: 10.1117/12.2228077; https://doi.org/10.1117/12.2228077
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