Weather Radar Clutter Correction via Pre-stored Map
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Solution Overview
Problem
Current methods for correcting weather data from ground-based radar systems, such as radial speed, spectral width, and differential reflectivity, are inadequate as they fail to effectively remove clutter, leading to unreliable weather detection, especially in hydrological applications.
Innovation Solution
A method involving the creation of a clutter map to correct weather data by calculating and applying weighted averages and interpolations/extrapolations to remove ground echoes, ensuring accurate correction of radial speed, spectral width, and differential reflectivity, using equations and weighting functions to stabilize results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clutter map subtraction or interpolation methods are used to correct weather data, then ground echoes can be filtered from intensity distribution, but no suitable correction options exist for radial speed, spectral width and differential reflectivity
Solution Approach 1:
The patent applies universality by creating a clutter map that serves multiple correction functions simultaneously. The same clutter map is used to correct not only intensity distribution but also radial speed, spectral width, and differential reflectivity data, making the correction system versatile across different weather data types while maintaining reliable weather detection
2Measurement precision
If complex algorithms with diverse thresholds are used for clutter filtering, then intensity correction can be achieved, but the correction process becomes complex and automated correction of other weather data is unavailable
Solution Approach 1:
The patent applies preliminary action by pre-generating a clutter map that contains stored information about ground echo characteristics. This pre-processed clutter map is then reused for correcting multiple weather data types (intensity, radial speed, spectral width, differential reflectivity), eliminating the need for complex real-time algorithms and enabling automated correction across all parameters
Data Source
AI summary
The invention relates to a method, an apparatus and a computer program product for correcting the weather data of radial speed, spectral width and/or differential reflectivity which have been acquired from radar echo data recorded by a ground-based, radar-based remote-sensing appliance (1) for measuring atmospheric conditions and including evaluable weather echoes and interfering ground echoes, corrected weather data being obtained by calculating out the interfering ground echoes from the acquired weather data by using a previously stored clutter map with an intensity distribution of radar echo data which include the ground echoes substantially without weather echoes.