Current meter components and other data from FIXED PLATFORMS from the NE Pacific (limit-180) as part of the VENTS program from 1994-09-16 to 1996-05-10 (NODC Accession 9600134)

Current meter components data were collected from FIXED PLATFORMS in the NE Pacific (limit-180) from 16 September 1994 to 10 May 1996. Data were collected by the Pacific Marine Environmental Laboratory (PMEL) as part of the VEMTS program. Data were processed by NODC to the NODC standard F015 Current Meter Components format. Full format description is available from NODC at www.nodc.noaa.gov/General/NODC-Archive/f015.html.

The F015 format contains time series measurements of ocean currents. These data are obtained from current meter moorings and represent the Eulerian method of current measurement, i.e., the meters are deployed at a fixed point and measure flow past a sensor. Position, bottom depth, sensor depth and meter characteristics are reported for each station. The data record includes values of east-west (u) and north-south (v) current vector components at specified date and time. Current direction is defined as the direction toward which the water is flowing with positive directions east and north. Data values may be subject to averaging or filtering and are typically reported at 10 - 15 minute time intervals. Water temperature, pressure and conductivity or salinity may also be reported. A text record is available for optional comments.

本数据集为海流计分量数据，采集时段为1994年9月16日至1996年5月10日，采集区域为东北太平洋（经度限制180°）的固定平台。数据由太平洋海洋环境实验室（Pacific Marine Environmental Laboratory, PMEL）作为VEMTS项目的一部分完成采集，后由美国国家海洋数据中心（National Oceanographic Data Center, NODC）按照其制定的F015海流计分量格式（F015 Current Meter Components format）标准进行标准化处理。完整的格式说明文档可通过NODC官网https://www.nodc.noaa.gov/General/NODC-Archive/f015.html获取。

F015海流计分量格式存储的是海洋环流的时间序列观测数据，其数据源为海流计锚系（current meter moorings），采用欧拉法（Eulerian method）进行海流测量：即海流计部署于固定点位，通过传感器感知流经的水流。每个测站均会记录其位置、海底水深、传感器布设深度以及海流计的参数特征。数据记录包含指定日期与时刻下的东西向（u）与南北向（v）海流矢量分量数值。海流方向定义为水流实际流向，正东与正北为正方向。数据值通常经过平均或滤波处理，采样间隔一般为10至15分钟。数据集还可附带水温、压强、电导率或盐度等辅助观测参数，同时支持可选的文本注释记录。