Sky Wave ---- 天波，從地球離子層反射回來的電磁波（估計這是妳所想要的“天波”）Skywave is the propagation of electromagnetic waves bent (refracted) back to the Earth's surface by the ionosphere. As a result of skywave propagation, a broadcast signal from a distant AM broadcasting station at night, or from a shortwave radio station (or during sporadic e season, a low band TV station) can sometimes be heard as clearly as local stations. (This is distinct from "groundwave" propagation, which is direct from transmitter to radio). Most long-distance HF radio communication (between 3 and 30 MHz) is a result of skywave propagation. Since the early 1920s amateur radio operators, limited to lower transmitter power than commercial radio, have taken advantage of skywave for long distance or DX communication.
atmospheric wave ----大氣波，大氣各種變量的周期性幹擾。An atmospheric wave is a periodic disturbance in the fields of atmospheric variables (like surface pressure or geopotential height, temperature, or wind velocity) which may either propagate (traveling wave) or not (stationary wave). Atmospheric waves range in spatial and temporal scale from large-scale planetary waves (Rossby waves) to minute sound waves. Atmospheric waves with periods which are harmonics of 1 solar day (e.g. 24 hours, 12 hours, 8 hours... etc) are known as atmospheric tides.
spatial wave ----空間波
僅供參考。