Slant path for tropopl and lenspl

8 次查看（过去 30 天）
Sebastian Diaz Riofrio
回答： Sara James 2024-7-2
Do the tropopl and lenspl functions take into account the perceived distance or the true distance, as in the image below? Do I have to introduce the perceived distance or the true distance, the one that takes into account the atmosphere refraction? Given an altitude and the elevation do the functions automatically compute the losses using the refractive indexes?

请先登录，再回答此问题。

回答（1 个）

Sara James
Sara James 2024-7-2
The tropopl and lenspl functions do take into account the slant paths. This is as opposed to functions like gaspl or rainpl, which are designed for horizontal paths.
Internally both tropopl and lenspl perform refraction in a layered manner as per ITU-R P.676-12. The thickness of the refractive layers increase exponentially from 10 cm near the surface to about 1 km at a height of 100 km. The refractive indices are based either on one of the 6 built-in ITU models (standard, low, mid summer, mid winter, high summer, high winter) or you can import your own measurements.
The losses are calculated based on those refracted paths. Do keep in mind that the lens effect is most prominent at lower elevation angles.

类别

在 Help Center 和 File Exchange 中查找有关 Environment and Clutter 的更多信息

标签

产品


版本

R2021a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by