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10 Nov 2019
Atmospheric attenuation. Use a value of 300 dB/km for the attenuation of a beam at ~ I THz (compare slide 19 from the THz lecture - this is roughly a value for mid- latitude summer at 1.05 THz. If 10 mW of power in a collimated beam is transmitted through the atmosphere, how much power is received at a target 100 m away? (Ignore 1/r2 losses for a collimated beam and assume that all the beam hits the target). If the target reflectivity is 10%, how much power returns to the emitter? (Again, ignore 1/r2 losses for a collimated beam, and assume all the returned beam is collected).
Atmospheric attenuation. Use a value of 300 dB/km for the attenuation of a beam at ~ I THz (compare slide 19 from the THz lecture - this is roughly a value for mid- latitude summer at 1.05 THz. If 10 mW of power in a collimated beam is transmitted through the atmosphere, how much power is received at a target 100 m away? (Ignore 1/r2 losses for a collimated beam and assume that all the beam hits the target). If the target reflectivity is 10%, how much power returns to the emitter? (Again, ignore 1/r2 losses for a collimated beam, and assume all the returned beam is collected).
Tod ThielLv2
6 Sep 2019