6_buoy_data

Wave measurements were carried out with Spotter buoy designed by Spoondrift (https://www.sofarocean.com/products/spotter). The buoy registers motion in 3 directions: x(easting) y(northing) and z(vertical) with 2.5 Hz frequency using GPS and Inertial Measurement Unit. After each 30 min of measurements wave statistics (including significant wave height and peak wave period that will be used for the comparison) is calculated. Wave frequency range of the buoy is 0.03 – 1 Hz, stated accuracy – 2 cm. Field measurements took place on July 11 – 27, 2019, at 20 m depth, 5.3 km distance from the Vistula Spit, Kaliningrad Region of Russia, the Baltic Sea coast (54.63 N 19.77 E). For the map of the site please check buoy_map.png figure.<br>In supplementary buoy_baltic_2019.csv file first column is epoch time, second – significant wave height in meters, third – peak period of wave spectrum in seconds, forth – mean wave period in seconds, fifth – wean wave direction in degrees. Wave parameters are plotted in the figure wave_data_buoy_balt.jpg本数据集采用Spoondrift公司研发的Spotter浮标（Spotter buoy）开展海浪测量，产品详情可参阅官网：https://www.sofarocean.com/products/spotter。该浮标借助GPS与惯性测量单元（Inertial Measurement Unit），以2.5Hz的采样频率记录东向（x）、北向（y）与垂向（z）三个方向的运动数据。每完成30分钟的测量周期后，系统将自动计算海浪统计参数，其中包含将用于后续对比分析的有效波高与峰值波周期。该浮标的海浪测量频率范围为0.03~1Hz，标称测量精度为2厘米。野外实地测量于2019年7月11日至27日开展，测点位于俄罗斯加里宁格勒州波罗的海海岸维斯图拉沙嘴（Vistula Spit）外5.3公里、水深20米的海域，坐标为北纬54.63°、东经19.77°。场地地图详见 buoy_map.png 图示。在补充文件 buoy_baltic_2019.csv 中，各列数据依次为：第一列为纪元时间（epoch time），第二列为以米为单位的有效波高，第三列为海浪频谱的峰值周期，第四列为平均波周期，第五列为平均波向。所有海浪参数已绘制于 wave_data_buoy_balt.jpg 图示中。