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首页> 外文会议>Sensors, systems, and next-generation satellites XIV >THE SURFACE WATER AND OCEAN TOPOGRAPHY MISSION: BUILDING A MISSION CONCEPT TO STUDY THE WORLD'S OCEANS AND FRESH WATER
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THE SURFACE WATER AND OCEAN TOPOGRAPHY MISSION: BUILDING A MISSION CONCEPT TO STUDY THE WORLD'S OCEANS AND FRESH WATER

机译：地表水和海洋地形学的任务：建立一个研究世界海洋和淡水的任务概念

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摘要

The Surface Water and Ocean Topography (SWOT) is a planned satellite mission to study the world's oceans and terrestrial surface water bodies. The SWOT mission concept has been proposed jointly by the global Hydrology and Oceanography science communities to make the first global survey of the Earth's surface water, observe the fine details of the ocean's surface topography, and measure how water bodies change over time. SWOT was one of 15 missions listed in the 2007 National Research Council's Decadal Survey for Earth science as a mission that NASA should implement in the incoming decade. This mission concept builds upon the heritage of prior missions and technologies such as Topex/Poseidon, Jason-1/ 2, the Shuttle Radar Topography Mission (SRTM), and the initial development of the Wide Swatch Ocean Altimeter intended for the Ocean Surface Topography Mission/Jason-2. The key measurement capability for SWOT is provided by a Ka-band synthetic aperture radar interferometer (KaRIn). With an orbit altitude of 970 km, the KaRIn instrument provides a high-resolution swath width of 120 km enabling global coverage (~90%) of the world's ocean's and fresh water bodies. The KaRIn measurement is being designed to provide a spatial resolution of 1 km for the oceans (after on-board processing), and 100 m for land water, both at centimetric accuracy. An additional instrument suite similar to the Jason series will complement KaRIn: a Ku-band nadir altimeter, a Microwave Radiometer and Precision Orbit Determination (POD) systems. To enable this challenging measurement performance, the SWOT mission concept is designed to overcome several challenges, such as very high raw data rate (320 Mbps), large on-board data volumes, high power demand, stringent pointing and stability requirements, and ground data processing systems, to produce meaningful science data products to our user community. The SWOT mission concept is being developed as a cooperative effort between NASA and CNES. This paper presents the initial end-to-end mission concept as well as the current plans to develop and implement this challenging mission in the future.
机译：地表水和海洋地形（SWOT）是一项计划中的卫星任务，旨在研究世界海洋和陆地地表水体。 SWOT任务概念是由全球水文学和海洋学科学界共同提出的，旨在对地球的地表水进行首次全球调查，观察海洋表面地形的精细细节，并测量水体随时间变化的方式。 SWOT是2007年美国国家研究委员会（National Research Council）对地球科学进行的十年调查中列出的15个任务之一，这是NASA在未来十年应执行的任务。该任务概念建立在先前任务和技术（例如Topex / Poseidon，Jason-1 / 2，航天飞机雷达地形任务（SRTM））以及用于海洋表面地形任务的Wide Swatch海洋高度计的初步开发的基础上/杰森-2。通过Ka波段合成孔径雷达干涉仪（KaRIn）提供SWOT的关键测量功能。 KaRIn仪器的轨道高度为970 km，可提供120 km的高分辨率幅宽，从而使全球范围（约90％）覆盖了世界海洋和淡水体。 KaRIn测量的设计目的是为海洋提供1 km的空间分辨率（在机载处理后），为陆地水提供100 m的空间分辨率，均以厘米为单位。另一个类似于Jason系列的仪器套件将补充KaRIn：Ku波段最低点高度仪，微波辐射计和精密轨道确定（POD）系统。为了实现这种具有挑战性的测量性能，SWOT任务概念旨在克服一些挑战，例如非常高的原始数据速率（320 Mbps），机载数据量大，高功率需求，严格的指向性和稳定性要求以及地面数据处理系统，为我们的用户社区生产有意义的科学数据产品。 SWOT任务概念是NASA和CNES之间合作开发的。本文介绍了最初的端到端任务概念以及当前在将来开发和实施这一具有挑战性任务的计划。

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