GNSS troposphere products from a network of low-cost GNSS receivers, Wroclaw, Poland, March-April 2021

This dataset contains multi-GNSS troposphere products, i.e. ECEF coordinates, zenith total delay (ZTD), and horizontal gradients, together with their uncertainties. These products were obtained using 3 processing strategies: 1) real-time (for details see https://link.springer.com/article/10.1007/s10291-020-01014-w, under to "advanced strategy" configuration, with the exception that only GPS and Galileo observations were considered); 2) near real-time (NRT, for details see http://egvap.dmi.dk/); 3) final (using CSRS online service, https://webapp.geod.nrcan.gc.ca/geod/tools-outils/ppp.php). Products are stored as standard Matlab MAT files. Each file contains a set of table arrays (Matlab format). Each table array contains the selected set of estimated parameters for a single station. Table columns are labeled and self-explanatory. A comma-delimited text file can be obtained using the in-build Matlab function "writetable.m". For convenience, the same information is stored in alternative data formats: 1) for NRT and Final products: troposphere SINEX v1 (TRO / TRP) 2) for real-time products: semicolon-delimited text files, with a self-explanatory header line; each file contains daily products for one station.本数据集涵盖多全球导航卫星系统（GNSS, Global Navigation Satellite System）对流层产品，包括地心地固坐标系（ECEF, Earth-Centered Earth-Fixed）坐标、天顶总延迟（ZTD, zenith total delay）、水平梯度及其不确定度。上述产品通过三类处理流程生成：1）实时产品（详细信息参见https://link.springer.com/article/10.1007/s10291-020-01014-w，采用"高级策略"配置，仅纳入GPS与Galileo观测数据）；2）准实时（NRT, near real-time）产品（详细信息参见http://egvap.dmi.dk/）；3）最终产品（采用加拿大自然资源部的CSRS在线服务，访问地址为https://webapp.geod.nrcan.gc.ca/geod/tools-outils/ppp.php）。所有产品以标准Matlab MAT文件格式存储，每个文件包含若干Matlab格式的表数组，每个表数组对应单个测站的一组估计参数。表列均标注清晰且含义自明。可通过内置Matlab函数"writetable.m"将数据导出为逗号分隔的文本文件。为便于使用，相同数据还提供了备选存储格式：1）针对准实时与最终产品：对流层SINEX v1（TRO / TRP）格式；2）针对实时产品：分号分隔的文本文件，带有含义自明的头部行，每个文件包含单个测站的单日产品。