IOOS Glider - ru29-20210908T1943

Second deployment of ru29 in the United States Virgin Islands in 2021.  This second deployment is a continuation of the first deployment on June 30, 2021, which was recovered for maintenance. The Challenger Glider Mission is a re-creation of the first global scientific ocean survey conducted by the HMS Challenger from 1872-1876. The goals of the mission are to establish a collaborative international network of autonomous underwater glider ports, to assess global ocean model predictive skill while contributing real-time profile data for assimilation in ocean forecast models by operational centers worldwide, and to crowd source student-based ocean research and discovery. This glider is providing temperature, conductivity, salinity, density and current profile observations. The current profiles are logged via external Nortek AD2CP files and are not available in this real-time dataset. The glider is also equipped with a Cetacean Research Acousonde 3A passive acoustic recorder. RU29s planned mission extends from the US Virgin Islands, British Virgin Islands, Anguilla, St. Martin (Fr), Sint Maarten (NED), St. Barthélemy (Fr), Antigua and Barbuda, St. Kitts and Nevis, and Guadaloupe, areas commonly impacted by tropical cyclones. Real-time datasets will include CTD data that will be provided to the IOOS Glider DAC and GTS to support ocean and atmospheric weather forecasting.cdm_data_type = TrajectoryProfileVARIABLES:trajectory (Trajectory Name)wmo_idtime (Profile Time, seconds since 1970-01-01T00:00:00Z)latitude (Profile Latitude, degrees_north)longitude (Profile Longitude, degrees_east)profile_idtime_uv (Depth-averaged Time, seconds since 1970-01-01T00:00:00Z)lat_uv (Depth-averaged Latitude, degrees_north)lon_uv (Depth-averaged Longitude, degrees_east)u (Depth-averaged Eastward Sea Water Velocity, m s-1)v (Depth-averaged Northward Sea Water Velocity, m s-1)latitude_qc (latitude Variable Quality Flag)longitude_qc (longitude Variable Quality Flag)... (26 more variables)

2021年美国维尔京群岛海域RU29自主水下滑翔机的第二次布放任务。本次布放为2021年6月30日首次布放任务的延续，首次布放后该滑翔机被回收开展维护工作。"挑战者滑翔机任务（Challenger Glider Mission）"是对1872-1876年英国皇家海军挑战者号（HMS Challenger）完成的首次全球海洋科学考察的复刻项目。

本任务的核心目标包括：构建协作型国际自主水下滑翔机港口网络；评估全球海洋数值模式的预测性能；为全球各业务化海洋预报中心的海洋预报模式同化提供实时剖面观测数据；发起众包式学生海洋研究与发现项目。

该滑翔机可获取温度、电导率、盐度、密度及海流剖面观测数据。其中海流剖面数据通过外置的Nortek AD2CP文件记录，未纳入本实时数据集。此外，该滑翔机搭载了鲸类研究用Acousonde 3A型被动声学记录仪。

RU29的规划任务航线覆盖美属维尔京群岛、英属维尔京群岛、安圭拉、法属圣马丁、荷属圣马丁、圣巴泰勒米（法属）、安提瓜和巴布达、圣基茨和尼维斯以及瓜德罗普，上述海域均为热带气旋的频发影响区域。

本实时数据集将包含CTD（温盐深）数据，相关数据将提交至IOOS滑翔机数据汇编中心（IOOS Glider DAC）及全球电信系统（GTS），用于支撑海洋与大气天气预报工作。

本数据集的通用数据类型（cdm_data_type）为TrajectoryProfile，变量列表如下：
- trajectory：轨迹名称
- wmo_id
- time：剖面时刻，单位为秒，纪元为1970-01-01T00:00:00Z
- latitude：剖面纬度，单位为北纬度数
- longitude：剖面经度，单位为东经度数
- profile_id
- time_uv：深度平均时刻，单位为秒，纪元为1970-01-01T00:00:00Z
- lat_uv：深度平均纬度，单位为北纬度数
- lon_uv：深度平均经度，单位为东经度数
- u：深度平均东向海流速度，单位为m·s⁻¹
- v：深度平均北向海流速度，单位为m·s⁻¹
- latitude_qc：纬度变量质量控制标记
- longitude_qc：经度变量质量控制标记
……（另有26个变量）