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An onboard processor and adaptive scanning controller for the Second-Generation Precipitation Radar

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5 Author(s)
Fischman, M.A. ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA ; Berkun, A.C. ; Chun, W. ; Im, E.
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Technology for the 14- and 35-GHz Second-Generation Precipitation Radar (PR-2) is currently being developed by the National Aeronautics and Space Administration Jet Propulsion Laboratory to support the development of future spaceborne radar missions. PR-2 will rely on high-performance onboard processing techniques in order to improve the observation capabilities (swath width, spatial resolution, and precision) of a low-Earth orbiting rainfall radar. Using field-programmable gate arrays (FPGAs), we have developed a prototype spaceborne processor and controller module that will support advanced capabilities in the PR-2 such as autotargeting of rain and compression of rainfall science data. In this paper, we describe the new technology components designed for the onboard processor, including an FPGA-based 40 × 109 op/s pulse-compression receiver/filter with a range sidelobe performance of -72 dB, and an adaptive scanning controller which yields a six-fold increase in the number of radar looks over areas of precipitation.

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:43 ,  Issue: 4 )