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The Space Situational Awareness (SSA) Programme is and European Space Agency's initiative designed to support Europe's independent space access and utilization through the timely and accurate information delivery regarding the space environment, and particularly hazards to both in orbit and ground infrastructure.〔(【引用サイトリンク】title=About SSA )〕 The SSA programme is split into three main segments:〔(【引用サイトリンク】title=SSA Programme overview )〕 * Space Weather (SWE) segment: monitoring the Sun, the solar wind, and in Earth’s magnetosphere, ionosphere and thermosphere, that can affect spaceborne and ground-based infrastructure or endanger human life or health * Near-Earth Objects (NEO) segment: detecting natural objects, such as asteroids and comets, which can potentially impact Earth * Space Surveillance and Tracking (SST) segment: Tracking active and inactive satellites and space debris The SSA programme is being implemented as an optional ESA programme with financial participation by 14 Member States. The programme started in 2009 and its mandate was extended until 2019. The second phase of the programme received €46.5 million for the 2013-2016 period.〔 ==Space Weather Segment== The SWE segment's main objective is to detect and forecast of space weather events, avoid adverse effect on European space assets and ground-based infrastructure. To achieve that, the segment will focus on delivery of real-time space weather information, forecasts and warnings, supported by a data archive, applications and services. Assets currently available for the segment consist of multiple ground-based and spaceborne sensors monitoring the Sun, solar wind and Earth’s magnetosphere, ionosphere and thermosphere. These include the Proba-2 satellite and the Kanzelhoehe Solar Observatory. The segment is jointly coordinated by the SWE Data Centre located at the ESTRACK Redu Station and the SSA Space Weather Coordination Centre (SSCC), both in Belgium.〔(【引用サイトリンク】title=SWE Segment )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Space Situational Awareness Programme」の詳細全文を読む スポンサード リンク
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