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Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.41 [2012] >
IJRSP Vol.41(4) [August 2012] >
| Title: | Some characteristics of earth-space path propagation phenomena at a tropical location |
| Authors: | Maitra, Animesh
Adhikari, Arpita
Bhattacharya, Aniruddha |
| Keywords: | Earth-space propagation
Ku-band signal
Rain attenuation
Depolarization
Rain drop size distribution (DSD) |
| Issue Date: | Aug-2012 |
| Publisher: | NISCAIR-CSIR, India |
| PACS No.: | 92.60.jf; 92.60.Kc |
| Abstract: | Two significant
propagation characteristics of Ku-band satellite signal, namely rain
attenuation and depolarization have been studied over Kolkata (22°34'N,
88°29'E), a tropical location. The existing Simple Attenuation Model (SAM) for
rain attenuation estimation has been improved by incorporating the effective
rain rate at different rain rates. The impact of rain drop size distribution
(DSD) on determining the extent of depolarization at the tropical location is
investigated. The lognormal distribution has been found to be more accurate
than the gamma distribution to model rain drop sizes in the present case. Rain
DSD varies for different types of rain, even during different phases of rain
event and is found to influence the cross-polar enhancement of Ku-band signal.
The annual variation of cross-polar enhancement indicates the dominance of
different types of rain during different seasons of the year. |
| Page(s): | 481-487 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.41(4) [August 2012]
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