Horizontal and vertical gradient refractivity joint estimation from weather radar phase measurements
| Autor: | Veronica Santalla del Rio, Rubén Nocelo López |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
Horizontal and vertical 0211 other engineering and technologies Phase (waves) Terrain 02 engineering and technology 01 natural sciences law.invention law Clutter Weather radar Radar Joint (geology) Image resolution Physics::Atmospheric and Oceanic Physics Geology 021101 geological & geomatics engineering 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | 2017 IEEE Radar Conference (RadarConf). |
| DOI: | 10.1109/radar.2017.7944410 |
| Popis: | Refractivity variations can be easily obtained from radar phase measurements using based-ground clutter returns under certain basic assumptions such as flat terrain and zero vertical gradient of the refractivity. However, in more realistic conditions, phase measurements can be significantly affected by the vertical gradient variations of the refractivity and the height variations between the different based-ground targets. This paper focuses on retrieving jointly the average horizontal atmospheric refractivity and its vertical gradient variations over hilly terrain using triple targets located at different heights in order to obtain a higher spatial resolution. A linear decrease of the refractivity with the height is assumed. Refractivity measurements were obtained with an S-Band coherent radar during the International H 2 O Project (IHOP_2002) held in the Southern Great Plains of Oklahoma (United States). Radar results have been compared with in situ measurements obtained from different weather based-ground stations located inside the influence area of the radar. A good correlation between both observations has been found. |
| Databáze: | OpenAIRE |
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