Temperature profiles from XBT casts from the OCEANUS as part of the Marine Resources Monitoring, Assessment and Prediction (MARMAP) project from 03 July 1981 (NODC Accession 8100595)

Temperature profiles were collected from XBT casts from the OCEANUS from 03 July 1981. Data were collected by the National Marine Fisheries Service (NMFS) as part of the Marine Resources Monitoring, Assessment and Prediction (MARMAP) project. 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 format contains temperature-depth profile data obtained using expendable bathythermograph (XBT) instruments. Cruise information, position, date and time were reported for each observation. The data records are comprised of pairs of temperature-depth values. The XBT data files contain temperature values at non-uniform depths. These depths were recorded at the minimum number of points (''''inflection points'''') required to accurately define the temperature curve. Standard XBTs can obtain profiles to depths of either 450 or 760 m. Special instruments permitted measurements to be obtained to 1830 m.

1981年7月3日，通过OCEANUS号科考船获取的抛弃式深海测温仪（expendable bathythermograph, XBT）投放剖面测温数据，由美国国家海洋渔业局（National Marine Fisheries Service, NMFS）作为海洋资源监测、评估与预测（Marine Resources Monitoring, Assessment and Prediction, MARMAP）项目的一部分采集。数据由美国国家海洋资料中心（National Oceanographic Data Center, NODC）处理为NODC标准通用深海测温仪输出（Universal Bathythermograph Output, UBT）格式。完整格式说明可从NODC获取，网址为www.nodc.noaa.gov/General/NODC-Archive/bt.html。

UBT格式包含通过XBT获取的温深剖面数据。每条观测记录均包含航次信息、站位坐标、观测日期与时间。数据记录由多组温深数值对构成。XBT数据文件存储的温度值对应非均匀分布的深度，这些深度以准确刻画温度曲线所需的最少点数（即"拐点"）进行记录。标准XBT可获取的剖面最大深度为450米或760米，特殊型号仪器则可实现1830米深度的测量。