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.

描述了德国GPS水蒸气检索系统的开发。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。这种水分数据在气象和地球科学的各个领域至关重要，例如天气预报，缓解危险和水管理。在第一个项目期间，已经开发并验证了大约270个德国GPS地面站的视线（倾斜）大气延迟数据的高级技术。已经实施和测试了几种层析成像重建技术。在第二阶段，应进行广泛的验证和验证研究。重建的湿度场将与气象观测值（例如辐射轮廓和水蒸气辐射仪数据）以及数值天气模型领域进行比较。 GPS观测提供的信息将被估算，并与重建的湿度场的误差有关。这些信息的组合将用于估计误差质量以及重建。与验证研究同时，数据处理和层析成像的所有步骤将得到进一步改进和优化。