|Budget Amount *help
¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Mainly based on radar meteor echo measurements we studied the behaviour of polar mesopause region (around 90 km altitude), especially, atmospheric gravity waves, which transport significant amount of momentum and energy in the atmosphere. Horizontal propagation directions of observed gravity waves showed clear seasonal and height dependence, which is thought to be due to interaction with background winds. We also developed techniques to apply meteor echo measurements to non-meteor radars such as SuperDARN radars in order to conduct more meteor echo observations in the polar region.