Wang, X.; Liu, J.X.; Liu, Z., and Dan, H.J., 2020. Marine meteorological data transmission evaluation methods based on load factor measurement. In: Guido Aldana, P.A. and Kantamaneni, K. (eds.), Advances in Water Resources, Coastal Management, and Marine Science Technology. Journal of Coastal Research, Special Issue No. 104, pp. 818–824. Coconut Creek (Florida), ISSN 0749-0208.

Since 1970, the lack of timely and efficient marine meteorological data has led to a large number of marine accidents and marine environment pollution. In the past few decades, digital communication technology has developed rapidly and achieved quite successful results. The advanced digital communication technology to transmit marine meteorological data are used. However, the impact of digital modulation methods on marine weather data transmission load rates is unclear. The purpose of this paper is to reveal the digital modulation method under the optimal environment of data transmission load rate. It studies and records 16 modulation methods, including 3 quadrature phase shift keying (QPSK) and 12 amplitude phase shift keying (APSK). It is found that the load efficiency obtained by the APSK modulation method can reach 51.00 Mbps in matlab, which is much higher than the load efficiency obtained from the navigation telex system based on the frequency shift keying (FSK) modulation method. The results show that the marine meteorological data transmission method using the APSK modulation method has the best load efficiency.