Title :
Simplified method for estimating gaseous absorption at low elevation angles along earth-space paths
Author :
Bouchard, Pierre
Author_Institution :
Satellite Commun. & Radio Propagation Res., Commun. Res. Centre Canada, Ottawa, ON, Canada
Abstract :
This paper presents a new simplified technique for estimating gaseous absorption at low elevation angles along Earth-space paths, taking into account both the effects of the Earth´s curvature and refraction. The refractive index of air is modeled as a negative exponential with respect to height. Gaseous absorption is evaluated by asymptotic expansion of its integral representation using Laplace´s method.
Keywords :
Laplace transforms; electromagnetic wave absorption; Laplace´s method; asymptotic expansion; earth-space paths; gaseous absorption; integral representation; low elevation angles; refractive index; Absorption; Atmospheric modeling; Attenuation; Earth; Equations; Mathematical model; Refractive index; Gaseous attenuation; airmass integral; asymptotic expansion of integrals;
Conference_Titel :
Antenna Technology and Applied Electromagnetics & the American Electromagnetics Conference (ANTEM-AMEREM), 2010 14th International Symposium on
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4244-5049-7
Electronic_ISBN :
978-1-4244-5050-3
DOI :
10.1109/ANTEM.2010.5552525
