Direct signals from the global navigation satellite system have reflection and scattering effects after passing through the sea level. When the reflected signal and the scattered signal enter the receiver, multipath effects will occur, which will affect the measurement results. Therefore, in navigation and positioning measurement, such signals must be suppressed. With the steady progress of global navigation satellite systems (GNSS) systems, reflected or scattered signals can be used to remotely sense the height of the sea. This altimeter technology is called global navigation satellite system reflectometry (GNSS-R). As a new sea altimeter technology, it can make up for the shortcomings of the high-cost satellite altimeter technology and the narrow range of tides in the previous sea altimeter technology, providing long-term stability and high spatial and temporal resolution signals. As a station altimeter, it is expected to solve the problem of medium-scale sea level altimeters. GNSS-R altimeter technology is one of the research fields that attract the attention of domestic and foreign experts and scholars. As an important part of college physical education curriculum, aerobics plays an important role in guiding students' physical and mental development and improving students' esthetic ability. While comprehensively popularizing high-quality education, the goal of comprehensive training of students has also been achieved. Different from the previous sports aerobics courses, if you want the continuous and diverse development of aerobics, you must continue to promote the reform and optimization of gymnastics guidance, the update of course content, and the guidance methods. In the development of aerobics research and practice, new experiences and social needs will be transformed into education and the quality of education will be improved. This article analyzes the factors that affect the quality of aerobics education in coastal areas and puts forward corresponding countermeasures and suggestions to improve the quality of aerobics education.Keywords Internet of Things . Sea level . Aerobics . Teaching quality This article is part of the Topical Collection on Smart agriculture and geo-informatics

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