| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
With the goal of the stable use of the next-generation high speed satellite communications and broadcast system, we showed the following results for multi-beam satellites. (1) On the basis of the prediction of the rain effect from weather prediction data in the each beam area, the measures to control transmission power are effective. (2) The rain prediction in a shorter time is necessary to achieve an effective compensation. (3) When strong rain falls in a short time, as well as the control of the transmission power, the measures such as changes of an encoding rate and the transmission speed are necessary. In addition, we evaluated the influence of the atmosphere on the link and showed that the influence of the atmospheric fluctuation could not ignore when antenna size became large.
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