System concept for the next-generation spaceborne precipitation radars

Im, E.; Durden, Stephen L.; Sadowy, G.; Berkun, A.; Huang, John; Lou, Michael; Lopez, B.; Rahmat‐Samii, Y.; Rengarajan, S.R.

doi:10.1109/aero.2000.878484

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…In Fig. 5(a), the radar first builds up echoes-in-flight at beam positions closest to nadir by transmitting at the minimum PRI, determined by (4) where is the slant altitude (either 8 or 12 km, for locator or high-resolution sweeps). Fig.…”

Section: A Timing Solutionmentioning

confidence: 99%

“…To attain the spatial resolution, swath width, and measurement precision that will be needed to observe rain down to the scale of convective cells using an earth-orbiting spaceborne radar, the National Aeronautics and Space Administration (NASA) Jet Propulsion Laboratory (JPL) is leading the development of some breakthrough technologies for a Second-Generation Precipitation Radar (PR-2), with dual-frequency, dual-polarization, and wide-swath scanning capabilities [4]- [6]. Fig.…”

Section: Introductionmentioning

confidence: 99%

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

Fischman

Berkun

Chun

et al. 2005

IEEE Trans. Geosci. Remote Sensing

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Abstract-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 10 9 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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Section: A Timing Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Fischman

Berkun

Chun

et al. 2005

IEEE Trans. Geosci. Remote Sensing

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“…The surface is modeled as a function which decreases linearly with look angle in the log-domain and is independent of . is given by (12) where and are chosen to model either an ocean surface or a land surface. Both and are in decibels.…”

Section: Approach For Signal-to-clutter Calculationmentioning

confidence: 99%

“…Because of the TRMM PRs success, a second-generation spaceborne precipitation radar (PR-2) is being investigated [12]. One of the goals of the new radar is to provide a sensitivity several decibels better than that of the TRMM PR.…”

Section: Application To Radar Analysis and Designmentioning

confidence: 99%

Surface clutter due to antenna sidelobes for spaceborne atmospheric radar

Durden

et al. 2001

IEEE Trans. Geosci. Remote Sensing

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A spaceborne radar for atmospheric observation must be able to detect atmospheric backscatter in the presence of clutter from the surface, due to antenna sidelobes. Such clutter can come from the same pulse as that observing the atmosphere if the radar antenna is pointed off-nadir. However, pulses both prior and subsequent to the pulse observing the atmosphere can also contribute to clutter, and surface clutter can be a problem even for nadir-looking radars. Here, the problem is analyzed by deriving a method for computing clutter which includes effects of all contributing transmit pulses, Doppler shifting, finite receiver bandwidth, and curved earth's surface. The results are applied to analysis of existing radars and design of future radar systems.

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“…Because of the TRMM PR's success, a second generation spaceborne precipitation radar (PR-2) is being investigated [7]. One of the goals of the new radar is to provide a 2, several dB better than that of the TRMM PR.…”

Section: Application To Radar Analysis and Designmentioning

confidence: 99%

Surface clutter due to antenna sidelobes for spaceborne atmospheric radar

Durden

Li²,

Im³

IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remot

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8 18)393-5285/sdurden@jpl.nasa.gov ABSTRACT A spacebome radar for atmospheric observation must be able to detect atmospheric backscatter in the presence of clutter due to antenna sidelobes. Here, we analyze the problem in detail, deriving a method for computing clutter which includes effects of all contributing transmit pulses, Doppler shifting, finite receiver bandwidth, and curved earth's surface. The results are applied to analysis of existing radars and design of future radar systems.

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System concept for the next-generation spaceborne precipitation radars

Cited by 8 publications

References 7 publications

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

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

Surface clutter due to antenna sidelobes for spaceborne atmospheric radar

Surface clutter due to antenna sidelobes for spaceborne atmospheric radar

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