PMID- 35632204 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220716 IS - 1424-8220 (Electronic) IS - 1424-8220 (Linking) VI - 22 IP - 10 DP - 2022 May 17 TI - A Real-Time GNSS-R System for Monitoring Sea Surface Wind Speed and Significant Wave Height. LID - 10.3390/s22103795 [doi] LID - 3795 AB - This paper presents a monitoring system based on Global Navigation Satellite System (GNSS) reflected signals to provide real-time observations of sea conditions. Instead of a computer, the system uses a custom-built hardware platform that incorporates Radio Frequency (RF), Field Programmable Gate Array (FPGA), Digital Signal Processing (DSP), and Raspberry Pi for real-time signal processing. The suggested structure completes the navigation signal's positioning as well as the reflected signal's feature extraction. Field tests are conducted to confirm the effectiveness of the system and the retrieval algorithm described in this research. The entire system collects and analyzes signals at a coastal site in the field experiment, producing sea surface wind speed and significant wave height (SWH) that are compared to local weather station data, demonstrating the system's practicality. The system can allow the centralized monitoring of many sites, as well as field experiments and real-time early warning at sea. FAU - Xing, Jin AU - Xing J AUID- ORCID: 0000-0002-7385-9567 AD - School of Electronic and Information Engineering, Beihang University, Beijing 100191, China. FAU - Yu, Baoguo AU - Yu B AD - State Key Laboratory of Satellite Navigation System and Equipment Technology, Shijiazhuang 050200, China. FAU - Yang, Dongkai AU - Yang D AD - School of Electronic and Information Engineering, Beihang University, Beijing 100191, China. FAU - Li, Jie AU - Li J AD - School of Electronic and Information Engineering, Beihang University, Beijing 100191, China. FAU - Shi, Zhejia AU - Shi Z AD - School of Electronic and Information Engineering, Beihang University, Beijing 100191, China. FAU - Zhang, Guodong AU - Zhang G AUID- ORCID: 0000-0001-7632-9046 AD - School of Electronic and Information Engineering, Beihang University, Beijing 100191, China. FAU - Wang, Feng AU - Wang F AD - School of Electronic and Information Engineering, Beihang University, Beijing 100191, China. LA - eng GR - BX20200039/China Postdoctoral Innovation Talent Support Program/ GR - 42104031/National Natural Science Foundation of China/ PT - Journal Article DEP - 20220517 PL - Switzerland TA - Sensors (Basel) JT - Sensors (Basel, Switzerland) JID - 101204366 SB - IM PMC - PMC9143471 OTO - NOTNLM OT - GNSS reflected signals OT - monitoring system OT - sea conditons COIS- The authors declare no conflict of interest. EDAT- 2022/05/29 06:00 MHDA- 2022/05/29 06:01 PMCR- 2022/05/17 CRDT- 2022/05/28 01:42 PHST- 2022/03/16 00:00 [received] PHST- 2022/04/26 00:00 [revised] PHST- 2022/05/04 00:00 [accepted] PHST- 2022/05/28 01:42 [entrez] PHST- 2022/05/29 06:00 [pubmed] PHST- 2022/05/29 06:01 [medline] PHST- 2022/05/17 00:00 [pmc-release] AID - s22103795 [pii] AID - sensors-22-03795 [pii] AID - 10.3390/s22103795 [doi] PST - epublish SO - Sensors (Basel). 2022 May 17;22(10):3795. doi: 10.3390/s22103795.