A World Atlas of Atmospheric Radio Refractivity
Abstract
The atlas presents world maps and graphs of upper-air radio refractivity, N(z) (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 N(z) maps are presented in terms of a three- part exponential model, with separate exponentials for the water vapor and air density terms of N(z), with the latter separated into tropospheric and stratospheric terms. The delta N data were derived by interpolation from fixed pressure-level data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1966
- Accession Number
- AD0648805
Entities
People
- B. A. Cahoon
- B. R. Bean
- C. A. Samson
- G. D. Thayer
Organizations
- Institute for Telecommunication Sciences