In recent years, a number of ocean remote sensing experiments have been conducted with achieving numerous progress. In October 2000, the Hurricane Hunter aircraft of the National Oceanic and Atmospheric Administration (NOAA) in the United States with carrying GNSS-R receiver flew into Hurricane Michael from the coast of South Carolina. By analyzing the GNSS signals reflected from the sea surface during the tropical cyclone, wind speed results were obtained [1]. The UK-DMC satellite of the United Kingdom successfully inferred the Earth’s surface physical coefficients such as sea surface roughness using its onboard GNSS-R equipment [2]. GNSS reflection signals from calm sea areas can also provide highly accurate altimetric results [3]. Currently, sea surface monitoring using GNSS reflected signals from the sea surface is a hot topic [4, 5]. For instance, sea surface roughness and ocean wind were monitored using GNSS signals. However, detailed analysis such as electromagnetic field scattering theory, energy and Doppler coefficient recovery methods [6], and the characteristics of L-band slope probability density functions still require further study.