A World Atlas of Atmospheric Radio Refractivity
INSTITUTE FOR TELECOMMUNICATION SCIENCES AND AERONOMY BOULDER CO
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The atlas presents world maps and graphs of upper-air radio refractivity, Nz where z is the altitude, mean monthly delta N the difference between the refractivity at the surface and at 1 km above the surface, extreme values of gradients of refractivity observed in the lowest layer of the atmosphere including maps of minimum trapped frequency ducting gradients, and monthly mean tropopause heights. All refractivity values were derived from radiosonde data. The Nz maps are presented in terms of a three- part exponential model, with separate exponentials for the water vapor and air density terms of Nz, with the latter separated into tropospheric and stratospheric terms. The delta N data were derived by interpolation from fixed pressure-level data.
- Atmospheric Physics
- Radio Communications