海面船舶探测谱段优选与效能分析
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北京跟踪与通信技术研究所

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Spectrum selection and performance analysis for ship detection
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Beijing Institute of Tracking and Telecommunication Technology

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    摘要:

    船舶等海面目标的探测对于海面管理、国防安全、搜索救援等领域有着重要意义。星载红外遥感覆盖范围广、大气路径短,是实现船舶目标广域探测的有效手段。受太阳天顶角昼夜循环的影响,船舶与海面的温差周期性变化,导致海面船舶探测场景存在一天两次的热交叉时期,此时使用单一探测谱段难以满足船舶目标全天时探测需求。本文以中纬度夏季和冬季海面环境为例,建立海面船舶探测场景的24小时红外辐射特征,提出多谱段优选组合方案,通过3.50μm~4.10μm和10.25μm~10.75μm双探测谱段探测实现信噪比优于16.52(夏季)和17.64(冬季)的昼夜连续观测。所提出的双谱段探测方法为实现广域全天时海面目标探测应用提供了技术支撑。

    Abstract:

    The detection of ships and other sea targets is of great significance to sea surface management, national defense security, search and rescue and other fields. Space-borne infrared remote sensing has a wide coverage and a short atmospheric path, which is an effective means to achieve wide-area detection of ship targets. Affected by the diurnal cycle of the solar zenith angle, the temperature difference between the ship and the sea surface changes periodically, resulting in a thermal crossover period twice a day in the ship detection scene on the sea surface. In this paper, taking the mid-latitude summer and winter sea surface environment as an example, the 24-hour infrared radiation characteristics of the sea surface ship detection scene are established, and a multi-spectrum optimal combination scheme is proposed, which is realized by the detection of dual detection spectrum bands of 3.50 μm~4.10μm and 10.25μm~10.75μm Day and night continuous observation with signal-to-noise ratio better than 16.52(summer) and 17.64(winter). The proposed dual-spectrum detection method provides technical support for the application of wide-area all-time sea surface target detection.

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  • 收稿日期:2023-07-04
  • 最后修改日期:2023-07-25
  • 录用日期:2023-08-10
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