- Optical Back Scatter
- Accounting: OBS
Универсальный русско-английский словарь. Академик.ру. 2011.
Optical Back Scatter
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Microwave transmission — The atmospheric attenuation of microwaves in dry air with a precipitable water vapor level of 0.001 mm. The downward spikes in the graph correspond to frequencies at which microwaves are absorbed more strongly, such as by oxygen molecules… … Wikipedia
