ITU-R Atmospheric Attenuation
Recommendation ITU-R P.676-9, Attenuation by Atmospheric Gases, P Series, Radiowave Propagation - RF CafeRF Cafe visitor Paul M., wrote asking where I got the data for my plot of atmospheric attenuation because he could not locate a table of data online. I told him it was generated by entering frequency / attenuation pairs from published charts into Excel and then plotting them. It was done that way to avoid a possible copyright violation. A month or so later, Paul wrote back providing a link to the International Telecommunications Union's (ITU) official document he finally found that provides this and lots of other data and charts. Thanks, Paul.

Posted  July 2012