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EFFECT OF SOLAR PARTICLES ON LEO SATELLITES

机译：太阳粒子对狮子座卫星的影响

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From the beginning of Space age, Solar Particles has been a major problem for space-crafts, probes, satellites and all other man- made equipment's. The orbital environment is a major consideration in the design of any space system associated with various hazards to earth orbiting satellites since it can have critical effect on spacecraft operations. Variation in solar environment also impact thermospheric density levels. The solar cycle also plays an important role in mission planning and operations activities. Solar flares are a major contributor to overall radiation environment and can add to dose of accumulated radiation levels. From the experimental satellites like SCATHA, CRRES and DMSP investigated the radiation environment of the inner and outer radiation belts and measured the state-of-art micro-electronics devices. These hazards include differential charging, internal charging and surface charging which can damage the spacecraft electronics. Solar storms and increased ultraviolet emissions heat earth's upper atmosphere causing it to expand, the heated air rises and density at the orbit of satellite increases significantly up to about 1000 kilometres. This results in increase in drag causing satellite to slow down and change orbit slightly by as much as 30 kilometres, LEO satellite are not repeatedly boosted to higher orbits slightly fall and will eventually burn up. During storms the number and energy of electrons and ions increases. When the satellite travel through this energized environment the charged particle striking the space craft differentially charge the portion of spacecraft. Discharges can arc across the spacecraft components, harming in possibly disabling them. If the sufficient charge accumulates in any one component, it may attempt to neutralize by discharging to other components. This discharge is hazardous to satellite electronic systems. This paper will discuss these cumulative effects on LEO satellites.
机译：从太空时代开始，太阳粒子一直是航天器，探测器，卫星和所有其他人造设备的主要问题。在设计任何与对地球轨道卫星造成各种危害有关的空间系统时，轨道环境是一个主要考虑因素，因为它会对航天器的运行产生重大影响。太阳环境的变化也会影响热层密度水平。太阳周期在任务计划和运营活动中也起着重要作用。太阳耀斑是整个辐射环境的主要贡献者，并且会增加累积辐射水平的剂量。通过SCATHA，CRRES和DMSP等实验卫星研究了内部和外部辐射带的辐射环境，并测量了最先进的微电子设备。这些危险包括差分充电，内部充电和表面充电，它们可能会损坏航天器的电子设备。太阳风暴和紫外线辐射的增加加热了地球的高层大气，使其膨胀，热空气上升，卫星轨道上的密度显着增加，达到约1000公里。这导致阻力增加，导致卫星减速，并略微改变轨道长达30公里。LEO卫星没有反复升至更高的轨道，略有下降，最终将被烧毁。在暴风雨期间，电子和离子的数量和能量都会增加。当卫星经过这个充满能量的环境时，撞击太空飞船的带电粒子会为太空飞船的一部分带不同的电荷。放电会在航天器部件之间产生电弧，从而有可能使部件失效。如果足够的电荷积聚在任何一种成分中，则可能会试图通过向其他成分放电而中和。这种放电对卫星电子系统有害。本文将讨论这些对LEO卫星的累积影响。

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