GLONASS-R - A novel method of sensing the environment by means of navigation satellite signals

该项目的第一年致力于基于软件定义无线电原理的硬件和软件开发。已经开发了一个全球轨道导航卫星系统-R原型系统，其中只有现成的组件。虽然所有的信号处理都是在软件方面实现的，但在项目的头几个月就可以验证实时操作。经过进一步的优化，错误修复和性能测试，很明显，我将能够比预期更早地测试系统。在东京的研究所进行了48小时的基本概念测试后，决定将该系统运往瑞典的Onsala空间天文台，该天文台拥有一个基于GPS的GNSS-R系统。在2013年10月为期两周的时间里，与新开发的全球轨道导航卫星系统-R系统并行进行了基于全球定位系统的全球导航卫星系统-R海平面监测和测量。此外，还提供了同一地点的验潮仪测量数据以供比较。利用现场试验获得的数据，不仅可以证明全球轨道导航卫星系统-R概念的可行性，而且可以表明，在平静海面条件下，全球轨道导航卫星系统-R原型可以达到约1-2厘米的精度，优于该地点的其他全球导航卫星系统-R系统。已经发表了相应的同行评审论文，并可以为未来的实验和验证活动建立合作。然而，当我搬到国外的一个新职位时，我退回了第二年的预算。今后与日本研究所的合作将包括在该项目范围内开展的工作。

The first year of the project was devoted to hard- and software development based on the principles of software-defined radio. A GLONASS-R prototype system has been developed with off-the-shelf components only. Although all signal processing has been implemented on the software side, real-time operation could be verified already in the first months of the project. After further optimization, bug-fixing and performance tests it was clear that I would be able to test the system earlier than anticipated. After a basic 48h conceptual test at our institute in Tokyo, it was decided to ship the system to the Onsala Space Observatory, Sweden, that has an operational GPS-based GNSS-R system. Over a period of two weeks in October 2013, GPS-based GNSS-R sea-level monitoring and measurements with the newly developed GLONASS-R system were carried out in parallel. In addition, data from co-located tide gauge measurements were available for comparison. With the data taken from the field experiment not only the feasibility of the GLONASS-R concept could be demonstrated, but it could be shown that for calm sea surface conditions, the GLONASS-R prototype can achieve an accuracy of about 1-2 cm, outperforming other GNSS-R systems at that site. A corresponding peer-reviewed paper has been published and cooperations for future experiments and validation campaigns could be established. However, as I moved to a new position abroad I returned the budget for the second year. Future collaboration with Japanese institutes will include the work carried out within this project.