Temperature profiles from expendable bathythermograph (XBT) casts from the USCGC MORGENTHAU in the East Coast - US/Canada in support of the Integrated Global Ocean Services System (IGOSS) project from 03 February 1974 to 15 March 1974 (NODC Accession 7400248)

XBT data were collected from the USCGC MORGENTHAU in support of the Integrated Global Ocean Services System (IGOSS) project. Data were collected by the US Coast Guard (USCG) from 03 February 1974 to 15 March 1974. 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.抛弃式温深计（expendable bathythermograph，XBT）数据采集自美国海岸警卫队摩根索号（USCGC MORGENTHAU），用于服务综合全球海洋服务系统（Integrated Global Ocean Services System，IGOSS）项目。本次数据由美国海岸警卫队（US Coast Guard，USCG）于1974年2月3日至1974年3月15日期间采集完成，后由国家海洋数据中心（National Oceanographic Data Center，NODC）按照NODC标准通用温深计输出（Universal Bathythermograph Output，UBT）格式进行标准化处理。完整的格式说明可通过NODC官网链接www.nodc.noaa.gov/General/NODC-Archive/bt.html获取。 UBT文件格式用于存储通过抛弃式温深计（XBT）获取的温度-深度剖面数据。标准型XBT可获取约450米或760米水深的剖面数据；配备专用仪器时，测量深度可达1830米。每条观测记录均附带航次信息、观测位置、观测日期与时间。数据记录由温度-深度值对组成。与以5米等间隔记录温度值的MBT数据文件不同，XBT数据文件的温度值对应非均匀水深。这些测点为以可接受精度完整记录温度曲线所需的最少拐点数量。在数据输出环节，用户可选择获取拐点处的原始温度值，或通过插值得到等深度间隔下的温度值。