Measurements of surface river Doppler velocities with along-track InSAR using a single antenna
| Autor: | Pia Addabbo, Filippo Biondi, Carmine Clemente, Danilo Orlando |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Synthetic aperture radar
Atmospheric Science 010504 meteorology & atmospheric sciences Water flow Computer science TK Geophysics. Cosmic physics 0211 other engineering and technologies 02 engineering and technology 01 natural sciences Along-track interferometry (ATI) law.invention symbols.namesake law Interferometric synthetic aperture radar Computers in Earth Sciences Radar TC1501-1800 Decorrelation 021101 geological & geomatics engineering 0105 earth and related environmental sciences Remote sensing QC801-809 multichromatic analysis (MCA) synthetic aperture radar (SAR) doppler subapertures Ocean engineering Interferometry river surface doppler velocity estimation symbols Antenna (radio) Doppler effect radar |
| Zdroj: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 13, Pp 987-997 (2020) |
| ISSN: | 2151-1535 |
| Popis: | Nowadays, a worldwide database containing the historical and reliable data concerning the water surface speed of rivers is not available and would be highly desirable. In order to meet this requirement, the present work is aimed at the design of an estimation procedure for water flow velocity by means of synthetic aperture radar (SAR) data. The main technical aspect of the proposed procedure is that an along-track geometry is synthesized using a single antenna and a single image. This is achieved by exploiting a multichromatic analysis in the Doppler domain. The application of this approach allows us to obtain along-track interferometry equivalent virtual baselines much lower than the equivalent baseline corresponding to the decorrelation time of raw data preserving data coherence. The performance analysis, conducted on live airborne full-polarimetric SAR data, highlights the effectiveness of the proposed approach in providing reliable river surface velocity estimates without the need of multiple passes on the observed scene. |
| Databáze: | OpenAIRE |
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