Name
Abstract | ||
|---|---|---|
The design, analysis, and demonstration of a digital-correlation microwave polarimeter for use in Earth remote sensing is presented. We begin with an analysis of a three-level digital correlator and develop the correlator transfer function and radiometric sensitivity. A fifth-order polynomial regression is derived for inverting the digital correlation coefficient into the analog statistic. In addition, the effects of quantizer threshold asymmetry and hysteresis are discussed. A two-look unpolarized calibration scheme is developed for identifying correlation offsets. The developed theory and calibration method are verified using a 10.7 GHz and a 37.0 GHz polarimeter. The polarimeters are based upon 1-GS/s three-level digital correlators and measure the first three Stokes parameters. Through experiment, the radiometric sensitivity is shown to approach the theoretical as derived earlier in the paper and the two-look unpolarized calibration method is successfully compared with results using a polarimetric scheme. Finally, sample data from an aircraft experiment demonstrates that the polarimeter is highly useful for ocean wind-vector measurement. |
Year | DOI | Venue |
|---|---|---|
2001 | 10.1109/36.964976 | IEEE T. Geoscience and Remote Sensing |
Keywords | Field | DocType |
radar polarimetry,remote sensing by radar,10.7 GHz,37.0 GHz,Earth remote sensing,Stokes parameters,aircraft experiment,analysis,correlator transfer function,demonstration,design,digital correlation coefficient,digital correlation microwave polarimetry,fifth-order polynomial regression,ocean wind-vector measurement,polarimeters,radiometric sensitivity,three-level digital correlators,unpolarized calibration method | Correlation function (quantum field theory),Correlation coefficient,Polarimetry,Stokes parameters,Remote sensing,Polynomial regression,Optics,Quantization (signal processing),Calibration,Polarimeter,Physics | Journal |
Volume | Issue | ISSN |
39 | 11 | 0196-2892 |
Citations | PageRank | References |
16 | 5.62 | 5 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Jeffrey Piepmeier | 1 | 639 | 80.99 |
| A. J. Gasiewski | 2 | 148 | 45.73 |