• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>OCEANS 2009, MTS/IEEE Biloxi - Marine Technology for Our Future: Global and Local Challenges >Potential impact of long-life environmental sonobuoys on littoral ASW
【24h】

Potential impact of long-life environmental sonobuoys on littoral ASW

机译：长寿命的声波浮标对沿海ASW的潜在影响

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The focus of military activity has recently shifted from large area engagements to regional conflicts. Consequently, supportive Naval maritime operations have continued to evolve toward littoral warfare in complicated shallow-water, near-shore environments. This evolution requires new sensors, advanced Concept of Operations, and improved data-analysis capabilities, among others. Planning operations in these harsh-environment areas is difficult because accurate predictions of tactical sensor performance depend on detailed knowledge of the local environmental conditions. Tactical mission planning is thus seldom optimal or efficient, often resulting in coverage gaps, increased risk, and reduced mission success. According to a Navy Mission Need Statement, "Air ASW tactical execution, especially in littoral seas, requires in-situ environmental updates for preflight mission planning. In the conduct of ASW operations, an urgent need for explicit knowledge of environmental variables is required to optimize the effectiveness of operational acoustic sensors, as well as acoustic sensors in development " The Naval Air Systems Command has considered extended-life environmental sonobuoy concepts to better characterize the littoral environment. Most designs contain a thermistor string to measure ocean temperatures and also hydrophones to measure ambient noise. This type of complex sonobuoy would be more expensive than a traditional single-measurement AXBT but it could provide a more thorough littoral environment assessment. This paper examines the trade-off between increased sensor complexity and improved ASW performance, in terms of cumulative detection probability. Some advantages of an extended-life combined thermistor string/hydrophone approach, compared to AXBTs and tactical hydrophones, are: 1) higher accuracy of the raw data; 2) temporal averaging to smooth out fluctuations; 3) extended area coverage during drift; 4) less chance for surface temperature anomalies (e.g., mixe-d-layer-depth errors) caused by various electronic and mechanical variability upon impact; 5) opportunities to discover thermal and acoustic feature boundaries during drift; and 6) less need to re-seed thus allowing longer tactical mission times. These advantages are evaluated relative to the following disadvantages: 1) increased cost; 2) potential drift outside the mission area; and 3) need for increased battery life for longer durations. The analysis is tempered by considering how a potential new system might be used. One assumption is that an environmental sampling decision aid is available to determine the minimum number and best initial locations of drifting sensors to meet performance objectives. The November 2007 Requirements Document from the Naval Oceanographic Office states ?Sampling guidance: Development of guidance on the best way to deploy, spatially and temporally, observation systems in order to meet various forecasting, model assimilation, and model evaluation objectives is needed.? Work in this area is reported in this Oceans '09 Conference in a paper entitled ?Uncertainty-based Adaptive AXBT Sampling with SPOTS?, which addresses optimal sampling requirements. For this trade-off analysis, temperature data from watersampling flights in the Sea of Japan off the east coast of Korea were used to simulate expected capability of a long-term drifting thermistor string. Then optimal initial positions for three notional buoys were determined followed by a simulation of drifting positions and data collected over 12 days. Ocean nowcasts were constructed and used to determine acoustic performance of a notional tactical sonobuoy field. The analysis shows that a drifting extended-life thermistor string can provide significant improvement in environmental characterization, tactical planning, and ASW detection performance.
机译：军事活动的重点最近已从大范围交战转移到区域冲突。因此，在复杂的浅水，近岸环境中，支持海军的海上行动继续向沿海战争发展。这种发展需要新的传感器，先进的操作概念以及改进的数据分析功能等。在这些恶劣环境区域中计划操作非常困难，因为对战术传感器性能的准确预测取决于对当地环境条件的详细了解。因此，战术任务计划很少是最优的或高效的，通常会导致覆盖范围缺口，风险增加和任务成功率降低。根据海军任务需求声明，“空中ASW战术执行，特别是在沿海海域，需要就地环境更新以进行飞行前任务计划。在进行ASW作战时，迫切需要明确环境变量知识以优化“运行中的声传感器的有效性以及正在开发中的声传感器”海军航空系统司令部考虑了延长使用寿命的声纳浮标概念，以更好地表征滨海环境。大多数设计包含用于测量海洋温度的热敏电阻串，以及用于测量环境噪声的水听器。这种复杂的声波浮标将比传统的单次测量AXBT贵，但它可以提供更全面的滨海环境评估。本文从累积检测概率的角度研究了增加的传感器复杂度和改进的ASW性能之间的权衡。与AXBT和战术水听器相比，延长寿命的热敏电阻串/水听器组合方法的一些优点是：1）原始数据的准确性更高; 2）时间平均以消除波动; 3）漂移期间扩大的区域覆盖范围; 4）出现表面温度异常（例如，混合- d层深度误差），是由各种电子和机械变化对撞击造成的; 5）在漂移过程中发现热和声学特征边界的机会; 6）无需再种下种子，因此可以延长战术任务时间。相对于以下缺点评估了这些优点：1）成本增加; 2）任务区以外的潜在漂移; 3）需要延长电池寿命。通过考虑如何使用潜在的新系统来进行分析。一种假设是可以使用环境采样决策辅助工具来确定漂移传感器的最小数量和最佳初始位置，以满足性能目标。海军海洋学办公室在2007年11月的要求文件中指出：“抽样指南：需要制定有关在时空上部署观测系统的最佳方法的指南，以便满足各种预测，模型同化和模型评估目标。”在本次Oceans '09大会的题为“基于不确定度的SPOTS的基于不确定度的自适应AXBT采样”的论文中报告了该领域的工作，该论文解决了最佳采样要求。在此折衷分析中，使用了来自韩国东海岸日本海中水采样飞行的温度数据来模拟长期漂移的热敏电阻串的预期能力。然后确定三个概念浮标的最佳初始位置，然后模拟漂移位置和在12天内收集的数据。构造了海洋临近预报，并用于确定概念战术声纳浮标场的声学性能。分析表明，延长寿命的热敏电阻串可以在环境特性，战术计划和ASW检测性能方面提供显着改善。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号