Ublox Neo M8T dataset (NMi campaign 2017-2020: 15-second resolution data) related to the publication: Potential of Cost-Efficient Single Frequency GNSS Receivers for Water Vapor Monitoring

RINEX3 (https://files.igs.org/pub/data/format/rinex305.pdf) Hatanaka-compressed (http://sopac.ucsd.edu/hatanaka.shtml) GNSS (Global Navigation Satellite System) data of single-frequency observations obtained by the Ublox Neo M8T receiver (Evaluation Toolkit) and standard Ublox patch antenna. <br> The data is downsampled to 15-second observations spanning from DOY (day of year) 95 in 2017 to DOY 83 in 2020. <br> The unit was placed on the rooftop of the observatory of the NMi building in Delft (approx. coordinate 51.986166, 4.387678). <br> The receiver was connected to a constant power supply. The antenna was placed on the flat rooftop (no significant obstruction in the sky) with a 10cm circular glound plane underneath.

本数据集采用RINEX3格式，经Hatanaka压缩（Hatanaka-compressed）处理，包含由搭载评估套件（Evaluation Toolkit）的Ublox Neo M8T接收机与标准Ublox贴片天线采集的单频全球导航卫星系统（Global Navigation Satellite System, GNSS）观测数据，相关格式规范与压缩方法的官方文档可分别通过链接https://files.igs.org/pub/data/format/rinex305.pdf与http://sopac.ucsd.edu/hatanaka.shtml查阅。<br>该数据集已被降采样至15秒观测间隔，观测时间覆盖2017年年积日（Day of Year, DOY）95至2020年年积日83。<br>数据采集单元部署于荷兰代尔夫特市NMi大楼天文台的屋顶，其近似坐标为51.986166, 4.387678。<br>接收机接入恒定供电电源；天线安装于平坦屋顶（天空视野无明显遮挡），下方配备10厘米圆形接地平面。