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  • 1
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    Magellan SAR processor design (1986)
    In:  CASI
    Details
    Publication Date: 2004-10-30
    Keywords: COMMUNICATIONS AND RADAR
    Type: V-Gram: Magellan Quarterly Bulletin about Venus and the Radar Mapping Mission, Issue 9; p 22-29
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Magellan SAR processing algorithm and H/W design (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The SAR (synthetic-aperture radar) data-processing algorithm to be used for the Magellan mission is described. Radar system design, SAR data characteristics, and hardware (H/W) constraints, which are critical to the processing algorithm design, are highlighted. Data flow and the H/W architecture are given to show the real-time data processing capability. Simulation results obtained from processing the synthetic point-target echos are presented to demonstrate the performance of the processing algorithm.
    Keywords: COMMUNICATIONS AND RADAR
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Squint mode SAR processing algorithms (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The unique characteristics of a spaceborne SAR (synthetic aperture radar) operating in a squint mode include large range walk and large variation in the Doppler centroid as a function of range. A pointing control technique to reduce the Doppler drift and a new processing algorithm to accommodate large range walk are presented. Simulations of the new algorithm for squint angles up to 20 deg and look angles up to 44 deg for the Earth Observing System (Eos) L-band SAR configuration demonstrate that it is capable of maintaining the resolution broadening within 20 percent and the ISLR within a fraction of a decibel of the theoretical value.
    Keywords: COMMUNICATIONS AND RADAR
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  • 4
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    Optimal Doppler centroid estimation for SAR data from a quasi-homogeneous source (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: This correspondence briefly describes two Doppler centroid estimation (DCE) algorithms, provides a performance summary for these algorithms, and presents the experimental results. These algorithms include that of Li et al. (1985) and a newly developed one that is optimized for quasi-homogeneous sources. The performance enhancement achieved by the optimal DCE algorithm is clearly demonstrated by the experimental results.
    Keywords: COMMUNICATIONS AND RADAR
    Type: IEEE Transactions on Geoscience and Remote Sensing (ISSN 0196-2892); GE-24; 1022-102
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Performance evaluation of the JPL interim digital SAR processor (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The performance of the Interim Digital SAR Processor (IDP) was evaluated. The IDP processor was originally developed for experimental processing of digital SEASAT SAR data. One phase of the system upgrade which features parallel processing in three peripheral array processors, automated estimation for Doppler parameters, and unsupervised image pixel location determination and registration was executed. The method to compensate for the target range curvature effect was improved. A four point interpolation scheme is implemented to replace the nearest neighbor scheme used in the original IDP. The processor still maintains its fast throughput speed. The current performance and capability of the processing modes now available on the IDP system are updated.
    Keywords: COMMUNICATIONS AND RADAR
    Type: Spaceborne Imaging Radar Symp.; p 93-95
    Format: text
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    NASA TECHNICAL REPORTS
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