Temperature profiles from expendable bathythermograph (XBT) casts from NOAA Ship RAINIER in the Bering Sea - Coastal Waters of Western Alaska and Coastal Waters of S. Alaska in support of the Integrated Global Ocean Services System (IGOSS) project from 1985-08-29 to 1985-09-03 (NODC Accession 85002

XBT data were collected from NOAA Ship RAINIER in support of the Integrated Global Ocean Services System (IGOSS) project. Data were collected by the National Ocean Service (NOS) from 29 August 1985 to 03 September 1985. Data were processed by NODC to the NODC standard Universal Bathythermograph Output (UBT) format. Full format description is available from NODC at www.nodc.noaa.gov/General/NODC-Archive/bt.html.

The UBT file format is used for temperature-depth profile data obtained using expendable bathythermograph (XBT) instruments. Standard XBTs can obtain profiles at depths of about 450 or 760 m. With special instruments, measurements can be obtained to 1830 m. Cruise information, position, date, and time are reported for each observation. The data record comprises pairs of temperature-depth values. Unlike the MBT data file, in which temperature values are recorded at uniform 5m intervals, the XBT Data File contains temperature values at non-uniform depths. These depths are at a minimum number of points ("inflection points") required to record the temperature curve to an acceptable degree of accuracy. On output, however, the user may request temperature values either at inflection points or interpolated to uniform depth increments.

本数据集的XBT数据为支持综合全球海洋服务系统（Integrated Global Ocean Services System, IGOSS）项目，由NOAA"雷尼尔号"科考船采集。数据由美国国家海洋服务处（National Ocean Service, NOS）于1985年8月29日至1985年9月3日期间采集完成，后由美国国家海洋数据中心（National Oceanographic Data Center, NODC）按照其通用深度温度计输出（Universal Bathythermograph Output, UBT）标准格式进行处理。完整格式说明可从NODC官方网站获取，网址为www.nodc.noaa.gov/General/NODC-Archive/bt.html。

UBT文件格式用于存储通过抛弃式深度温度计（expendable bathythermograph, XBT）仪器获取的温度-深度剖面数据。标准型XBT可获取约450米或760米深度的剖面数据；搭配专用仪器时，测量深度可达1830米。每份观测数据均包含航次信息、观测位置、日期与时间。数据记录由多组温度-深度值配对组成。与温度值按固定5米间隔记录的MBT数据文件不同，XBT数据文件中的温度值对应非均匀深度测点，这些测点为以可接受精度记录温度曲线所需的最少点数（即"拐点"）。在输出环节，用户可选择直接获取拐点处的温度值，或通过插值得到均匀深度间隔下的温度数值。