Temperature profiles from expendable bathythermograph (XBT) casts from the USCGC GALLATIN in the North Atlantic Ocean in support of the Integrated Global Ocean Services System (IGOSS) from 27 May 1976 to 30 May 1976 (NODC Accession 7601263)

XBT data were collected from the USCGC GALLATIN in support of the Integrated Global Ocean Services System (IGOSS). Data were collected by the US Coast Guard from 27 May 1976 to 30 May 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.

投弃式温深仪（expendable bathythermograph，XBT）数据采集自美国海岸警卫队“加拉丁”号（USCGC GALLATIN），服务于综合全球海洋服务系统（Integrated Global Ocean Services System，IGOSS）。该数据集由美国海岸警卫队于1976年5月27日至1976年5月30日期间采集，后由美国国家海洋数据中心（National Oceanographic Data Center，NODC）处理为其标准通用温深仪输出（Universal Bathythermograph Output，UBT）格式。完整格式说明可从NODC官方渠道获取，网址为www.nodc.noaa.gov/General/NODC-Archive/bt.html。
UBT文件格式用于存储通过XBT仪器获取的温度-深度剖面数据。标准型XBT可在约450米或760米深度处获取剖面数据；若搭载专用拓展仪器，测量深度可达1830米。每份观测记录均包含航次信息、观测位置、观测日期与时间。数据记录由多组温度-深度值对构成。与机械式温深仪（MBT）数据文件不同——MBT数据文件以均匀5米间隔存储温度值——XBT数据文件的温度值对应非均匀深度测点，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”。在输出环节，用户可自主选择获取拐点处的原始温度值，或通过插值生成均匀深度增量下的温度数据。