Takao Nakagawa

Thermospheric response to solar EUV variability probed with orbital-energy decay from NinjaSat CubeSat GNSS telemetry

Solar extreme ultraviolet (EUV) radiation heats and expands the thermosphere, modulating atmospheric density at altitudes in low Earth orbit and thereby increasing satellite drag and accelerating orbital decay. Previous studies have relied on empirical solar proxies, such as the...