Estimation of the Parameters Used in the Azimuth Compression

Abstract

In azimuth processing of SAR data, the slant range histories of the targets are required. After range compression the maxima of the responses of a point target are on the so called range migration locus. For spaceborne SAR the locus traverses a number of range bins. This locus determines where to get the samples needed for the azimuth compression and the phase function which must be used. For satellite SAR the locus can be described by two parameters, the Doppler centroid f DC and the frequency rate f DR. These parameters can be estimated by using accurate spacecraft ancillary data and by utilizing the received radar data alone. This report describes the effects of errors in the parameters used by the processor and discusses algorithms to estimate the parameters. Examples of results from processing Seasat data are shown. The report is one of a series for a SAR processor for the ERS-1 data, phase 2, precision processor. The work described was subsidized by the NIVR (NIVR, NRT nr, 2802 FE, SAR processor).

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1991
Accession Number
ADA245679

Entities

People

  • F. P. De Vries

Organizations

  • Netherlands Organisation for Applied Scientific Research

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Algorithms
  • Bandwidth
  • Cross Correlation
  • Earth Sciences
  • Electronics Laboratories
  • Estimators
  • Frequency
  • Iterations
  • Physics
  • Radar
  • Spacecraft
  • Statistical Algorithms
  • Synthetic Aperture Radar
  • Time Domain
  • Urban Areas

Readers

  • Image Processing and Computer Vision.
  • Sensor Fusion and Tracking Systems.
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Space
  • Space - Orbital Debris
  • Space - Space Objects