Development of a tomographic water vapour sounding system based on GNSS data

基于GNSS数据的层析水汽探测系统的开发

• 批准号: 36432749
• 负责人: Dr. Armin Raabe
• 金额: --
• 依托单位: Institut für Geodäsie und Geoinformationstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/36432749?language=en
• 关键词: Development; tomographic; water; vapour; sounding

The development of a GPS water vapour retrieval system for Germany is described. The humidity information as extracted from GPS data is used to reconstruct spatially resolved water vapour distributions. Such moisture data are essential in various fields of meteorology and geoscience, e.g., weather forecast, hazard mitigation and water management. In the first project period advanced techniques for the derivation of line-of-sight (slant) atmospheric delay data from about 270 German GPS ground stations have been developed and validated. Several tomographic reconstruction techniques have been implemented and tested. In the second period extensive validation and verification studies shall be carried out. The reconstructed humidity field will be compared with meteorological observations such as radiosonde profiles and water vapour radiometer data and with numerical weather model fields as well. The information provided by the GPS observations will be estimated and related to the error of the reconstructed humidity field. A combination of these information will be used to estimate the error quality together with the reconstruction. In parallel to the validation studies all steps of the data processing and tomography will be further improved and optimized.

介绍了德国 GPS 水汽检索系统的开发情况。从 GPS 数据中提取的湿度信息用于重建空间分辨的水蒸气分布。此类湿度数据对于气象和地球科学的各个领域至关重要，例如天气预报、减灾和水管理。在第一个项目期间，用于从约 270 个德国 GPS 地面站获取视线（倾斜）大气延迟数据的先进技术已得到开发和验证。几种断层扫描重建技术已经被实施和测试。第二阶段将进行广泛的验证和验证研究。重建的湿度场将与无线电探空仪剖面和水蒸气辐射计数据等气象观测以及数值天气模型场进行比较。 GPS 观测提供的信息将被估计并与重建湿度场的误差相关。这些信息的组合将用于估计错误质量以及重建。在验证研究的同时，数据处理和断层扫描的所有步骤都将得到进一步改进和优化。