Synthetic aperture radar (SAR) compensating for ionospheric distortion based upon measurement of the group delay, and associated methods
US6919839B1 · kind B1 · utility
23Cited by
14References
62Claims
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Key dates
| Filing date | Nov 9, 2004 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Nov 9, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/90
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A synthetic aperture radar (SAR) compensates for ionospheric distortions based upon measurement of the group delay, particularly when operating in the VHF/UHF band. The SAR is based upon a multi-input multi-output (MIMO) technique for estimating the effective ionospheric conditions, which is referred to as the group delay approach. The group delay approach is divided into a 1-dimensional (range) approach and a 2-dimensional (range and cross-range) approach. The group delay measures the effective or observed TEC, which is used to reduce the ionospheric distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.