Satellite Observation Data Correction via Radiosonde Calibration
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Solution Overview
Problem
The existing satellite observation data for the Qinghai-Tibet Plateau has errors due to limited spatio-temporal distribution of radiosonde stations, and there is a need for supplementary observation and correction to improve the accuracy of high spatio-temporal resolution satellite data.
Innovation Solution
A method and system using a space-air-ground integrated (SAGIN) vertical sounding solution combined with a satellite, a radiosonde, and a microwave radiometer (MWR) mobile platform to networked observe the vertical sounding of radiosonde observation limited areas, correcting satellite observation data through error correction models based on matched data from radiosonde and MWR observations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellite observation data are used to improve spatio-temporal coverage, then observation coverage is improved, but measurement precision deteriorates due to various errors in satellite data compared to radiosonde stations
Solution Approach 1:
The patent uses radiosonde observation data as an intermediary to correct satellite observation data. The correction system establishes a mapping relationship between satellite data and radiosonde data, using the high-precision radiosonde measurements to calibrate and correct the satellite data, thereby eliminating the errors present in satellite observations while maintaining their broad coverage advantage
Solution Approach 2:
The patent implements a feedback mechanism where satellite observation data are continuously corrected using radiosonde observation data. The correction results are then used to improve subsequent satellite data processing, creating a closed-loop system that progressively reduces errors and enhances measurement precision while maintaining extensive observation coverage
2Measurement precision
If radiosonde observation stations are increased to improve data accuracy, then measurement precision is improved, but device complexity and observation cost increase
Solution Approach 1:
The patent makes the limited radiosonde observation stations serve multiple functions: they not only provide primary observation data but also act as reference stations for correcting satellite data across the entire plateau region. This multi-functional use maximizes the utility of existing radiosonde stations without requiring additional infrastructure
Solution Approach 2:
The patent creates a virtual extension of radiosonde observation capacity by using satellite data as copies of the radiosonde measurements in areas where no physical radiosonde stations exist. The satellite data are corrected to match radiosonde characteristics, effectively copying the high-precision observation capability to regions without physical observation infrastructure
3Speed
If satellite temporal resolution is increased to capture convective systems, then observation frequency is improved, but loss of time for data processing and correction increases
Solution Approach 1:
The patent performs preliminary correction of satellite data using available radiosonde observations before the data are fully processed and analyzed. By establishing the correction framework and mapping relationships in advance, the system minimizes the time required for subsequent data processing while maintaining high observation frequency to capture rapidly developing convective systems
Data Source
AI summary
The present disclosure provides a method, system and apparatus for correcting satellite observation data. By acquiring microwave radiometer (MWR) movement observation data of a radiosonde observation limited sounding area, correcting the MWR movement observation data based on corresponding radiosonde observation data, and correcting satellite observation data based on the radiosonde observation data and corrected MWR movement observation data, the present disclosure corrects the satellite observation data of the radiosonde observation limited detection area, reduces an error of the satellite observation data, and makes the satellite observation data more accurate. The present disclosure realizes networked observation on vertical sounding of the radiosonde observation limited area, changes a limited observation condition of radiosonde observation only available at 08:00 and 20:00 every day in the original service system, and acquires complete high spatio-temporal resolution vertical sounding data of the radiosonde observation limited area in daytime.