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Estimation and Compensation of Turbulent Tropospheric Delay in High-Resolution SAR Image
- Source :
- IEEE Transactions on Geoscience and Remote Sensing. 59:4775-4789
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- As a typical propagation error, tropospheric delay has been fully considered during synthetic aperture radar (SAR) interferometry and differential interferometry, while the influence on the SAR imaging process is just concerned in advanced configurations, e.g., staring mode, high-resolution, geosynchronous/geostationary (GEO) SAR. In this article, a comprehensive model of turbulent tropospheric delay (TTD), involving atmospheric sciences and fluid mechanics, is introduced, and the influence of which on high-resolution SAR is analyzed. In order to compensate for the influence of TTD in advanced SAR missions, the autofocus method used in motion error compensation is extended, and a 2-D phase error estimation and compensation algorithm is proposed. Subsequently, the simulation experiments of both dot-matrix targets and TerraSAR-X data are performed to validate the effectiveness of the proposed algorithm. Conclusions and prospects are reached in the end.
- Subjects :
- Autofocus
Synthetic aperture radar
Computer science
0211 other engineering and technologies
02 engineering and technology
Atmospheric model
law.invention
Compensation (engineering)
Azimuth
Interferometry
Staring
law
Geostationary orbit
General Earth and Planetary Sciences
Electrical and Electronic Engineering
021101 geological & geomatics engineering
Remote sensing
Subjects
Details
- ISSN :
- 15580644 and 01962892
- Volume :
- 59
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Geoscience and Remote Sensing
- Accession number :
- edsair.doi...........bd8aae6a09bddab1eed4f29c99518ac3