Temperature profiles from XBT casts from the RUSH from Ocean Weather Station N (OWS-N) in the North Pacific Ocean from 22 November 1972 to 20 December 1972 (NODC Accession 7300090)

Bathythermograph data were collected from the RUSH within a 1-mile radius of Ocean Weather Station N (3000N 14000W) and in transit. Data were collected by the United States Coast Guard from 22 November 1972 to 20 December 1972. The platform was equipped and staffed to observe weather and sea conditions. 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) instrument. 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.温深计（Bathythermograph）数据采集自“RUSH”号观测船，覆盖海洋气象站N（30°00′N，140°00′W）周边1英里范围及航行途中海域。美国海岸警卫队于1972年11月22日至12月20日完成该批数据的收集工作。该观测平台配备专业观测设备并配有操作人员，可开展气象与海洋状况监测。所有数据均由美国国家海洋数据中心（National Oceanographic Data Center, NODC）处理为符合NODC标准的通用温深计输出（Universal Bathythermograph Output, UBT）格式。完整格式说明可通过NODC官网获取，网址为www.nodc.noaa.gov/General/NODC-Archive/bt.html。 UBT文件格式用于存储使用投弃式温深计（Expendable Bathythermograph, XBT）采集的温度-深度剖面数据。标准型XBT可获取约450米或760米深度范围内的剖面数据；若配备专用仪器，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、日期与时间，数据记录由多组温度-深度数值对构成。与MBT数据文件不同——MBT数据文件以均匀5米间隔记录温度数值——XBT数据文件中的温度数值对应非均匀深度，这些深度点为满足温度曲线记录精度要求所需的最少“拐点”数量。不过在输出环节，用户可选择获取拐点处的温度数值，或通过插值得到均匀深度间隔下的温度数值。