Current direction, bathythermograph (xbt), CTD, and other data from moored current meter casts and other instruments in the Coastal Waters of California as part of the North California Coastal Circulation Study (NCCCS) project, 1987-03-09 to 1989-11-01 (NCEI Accession 9000209)

Current direction, bathythermograph (xbt), CTD, and other data were collected using moored current meter casts and other instruments in the Coastal Waters of California from March 9, 1987 to November 1, 1989. Data were submitted by Edgerton, Germeshausen and Grier, INC. as part of the North California Coastal Circulation Study (NCCCS) project. Data has been processed by NODC to the NODC standard F015- Current Meter Data, F022- CTD High Resolution, and C116- Bathythermograph XBT formats.

The F015 format is used for time series measurements of ocean currents. These data are obtained from current meter moorings and represent 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 comprises 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 and negative directions west and south. 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.

The F022 format contains high-resolution data collected using CTD (conductivity-temperature-depth) and STD (salinity-temperature-depth) instruments. As they are lowered and raised in the oceans, these electronic devices provide nearly continuous profiles of temperature, salinity, and other parameters. Data values may be subject to averaging or filtering or obtained by interpolation and may be reported at depth intervals as fine as 1m. Cruise and instrument information, position, date, time and sampling interval are reported for each station. Environmental data at the time of the cast (meteorological and sea surface conditions) may also be reported. The data record comprises values of temperature, salinity or conductivity, density (computed sigma-t), and possibly dissolved oxygen or transmissivity at specified depth or pressure levels. Data may be reported at either equally or unequally spaced depth or pressure intervals. A text record is available for comments.

The C116 format contains temperature-depth profile data obtained using expendable bathythermograph (XBT) instruments. Cruise information, position, date and time were reported for each observation. The data record was comprised of pairs of temperature-depth values. Unlike the MBT Data File, in which temperature values were recorded at uniform 5 m intervals, the XBT data files contained temperature values at non-uniform depths. These depths were recorded at the minimum number of points ("inflection points") required to accurately define the temperature curve. Standard XBTs can obtain profiles to depths of either 450 or 760 m. With special instruments, measurements can be obtained to 1830 m. Prior to July 1994, XBT data were routinely processed to one of these standard types. XBT data are now processed and loaded directly in to the NODC Ocean Profile Data Base (OPDB). Historic data from these two data types were loaded into the OPDB.

当前方向、声学测深仪（xbt）、CTD及其他数据，通过锚泊流速计投放及其他仪器在加利福尼亚沿岸水域自1987年3月9日至1989年11月1日间进行收集。数据由埃奇顿、杰默哈森和格里尔公司（Edgerton, Germeshausen and Grier, INC.）提交，作为北加利福尼亚沿岸环流研究（NCCCS）项目的一部分。数据已由NODC按照NODC标准F015-流速计数据、F022-CTD高分辨率以及C116-声学测深仪XBT格式进行处理。

F015格式用于海洋流体的时间序列测量。这些数据来自流速计锚泊，代表欧拉方法测量流体，即流速计在固定点部署并测量通过传感器的流动。每个站点的位置、底部深度、传感器深度和仪器特性均被报告。数据记录包括在指定日期和时间测量的东西向（u）和南北向（v）的流速矢量分量。流速方向定义为水流流动的方向，其中向东和向北为正方向，向西和向南为负方向。数据值可能受到平均或滤波的影响，并通常以每10-15分钟的时间间隔报告。水温、压力以及电导率或盐度也可能被报告。可选的文本记录可用于注释。

F022格式包含使用CTD（电导率-温度-深度）和STD（盐度-温度-深度）仪器收集的高分辨率数据。随着这些电子设备在海洋中的下潜和上升，它们提供了温度、盐度及其他参数的近乎连续的剖面。数据值可能受到平均或滤波的影响，或通过插值获得，并可能以深度间隔1米精细程度进行报告。每个站点的巡航和仪器信息、位置、日期、时间和采样间隔均被报告。在投放时的环境数据（气象和海面状况）也可能被报告。数据记录包括在指定深度或压力水平测量的温度、盐度或电导率、密度（计算出的sigma-t）以及可能溶解氧或透射率。数据可以报告在等间距或不等间距的深度或压力间隔。可选的文本记录可用于注释。

C116格式包含使用可消耗声学测深仪（XBT）获得的温度-深度剖面数据。每个观测点的巡航信息、位置、日期和时间均被报告。数据记录由温度-深度值的对组成。与MBT数据文件不同，其中温度值以均匀的5米间隔记录，XBT数据文件包含非均匀深度的温度值。这些深度记录在最小数量的点（“拐点”）上，以准确定义温度曲线。标准XBT可以获取至450米或760米的剖面。使用特殊仪器，测量可以获取至1830米。在1994年7月之前，XBT数据通常被处理为这些标准类型之一。现在，XBT数据直接处理并加载到NODC海洋剖面数据库（OPDB）中。这两种数据类型的历史数据已加载到OPDB中。