摘要
波浪是海洋中的重要运动现象,监测波浪的变化并研究其运动规律,对海洋学研究和海洋工程具有重要的意义。目前传统的GNSS(Global Navigation Satellite System)测波方法在实时高精度波浪测量方面存在很大劣势和限制。本文研究了一种基于GNSS技术的实时高精度波浪测量方法,能得到波高、周期等波浪要素信息,并以南海浮标试验实测数据为例进行了处理和分析,验证了该方法的可行性。该方法直接基于广播星历进行GNSS相位观测值历元差分确定浮标速度,无需额外的实时精密差分改正数,从而节省了精密差分改正服务成本与海上通讯成本。该方法适用于近海、远海场景,并且浮标可以使用低成本单频GNSS接收机,得到高精度波浪测量结果,具有较高的实际应用价值。
Waves are one of the important movement phenomena in the ocean and the monitoring of their changes and the studying of their motion rules are of great significance for both the oceanographic research and the marine engineering.However,the traditional GNSS wave measurement methods have great disadvantages and limitations in real-time and high-precision wave measurement.A method for real-time and high-precision wave measurement based on GNSS technology is studied,by which real-time wave elements such as wave height and wave period can be obtained.As the example,the data measured in the buoy test in the South China Sea are processed and analyzed,and the feasibility of the method is verified.By this method,the buoy velocity can be determined directly by carrying out the epoch difference of the GNSS phase observations based on the broadcast ephemeris,and no other additional precise differential correction is needed,thus saving on the high-precision differential correction service costs and the offshore communication costs.This method can be applicable in the offshore and far-sea scenarios,can use the wave buoy mounted with low-cost single-frequency GNSS receivers to obtain high-precision wave measurements and thus has a high practical application value.
作者
田力
刘杨
李梦昊
刘焱雄
TIAN Li;LIU Yang;LI Meng-hao;LIU Yan-xiong(First Institute of Oceanography, MNR, Qingdao 266061, China;School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China)
出处
《海岸工程》
2021年第3期206-213,共8页
Coastal Engineering
基金
国家重点研发计划项目——国家PNT体系弹性化架构设计与关键技术示范验证(2020YFB0505805)
国家自然科学基金项目——顾及声速水平梯度影响的海底大地基准点GNSS-A精密定位方法研究(42004030)。
