Temperature profiles from expendable bathythermograph (XBT) casts from the USNS SILAS BENT in the North Pacific Ocean in support of the Integrated Global Ocean Services System (IGOSS) project from 12 May 1976 to 07 July 1976 (NODC Accession 7601743)

XBT data were collected from the USNS SILAS BENT in support of the Integrated Global Ocean Services System (IGOSS) project. Data were collected by the US Navy; Naval Oceanographic Office (NAVOCEANO) from 12 May 1976 to 07 July 1976. 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.

抛弃式深海测温仪（Expendable Bathythermograph，XBT）数据采集自美国海军舰船USNS SILAS BENT，服务于全球海洋综合服务系统（Integrated Global Ocean Services System，IGOSS）项目。该数据由美国海军海洋局（Naval Oceanographic Office，NAVOCEANO）于1976年5月12日至1976年7月7日期间采集。数据由美国国家海洋数据中心（National Oceanographic Data Center，NODC）处理为符合NODC标准的通用深海测温仪输出（Universal Bathythermograph Output，UBT）格式。完整的格式说明可通过NODC官网的以下链接获取：www.nodc.noaa.gov/General/NODC-Archive/bt.html。
通用深海测温仪输出（Universal Bathythermograph Output，UBT）文件格式用于存储通过抛弃式深海测温仪（XBT）设备获取的温深剖面数据。标准型抛弃式深海测温仪可获取约450米或760米深度的温深剖面；配备专用设备时，测量深度可达1830米。每次观测均记录航次信息、观测位置、观测日期与时间。数据记录由温深值配对构成。与机械式深海测温仪（Mechanical Bathythermograph，MBT）数据文件不同，后者以固定5米间隔记录温度值，而XBT数据文件的温度值对应非均匀深度。这些深度点为将温度曲线记录至可接受精度所需的最少点数，即"拐点"（inflection points）。在数据输出环节，用户可选择获取拐点处的原始温度值，或通过插值得到固定深度间隔下的温度值。