Pronostico de radioatenuación troposférica por lluvia en las  ciudades de Bogotà Y Medellín - Colombia.

Rafael Roncallo Kelsey; Rossy Rosillo Martinez; Cesar Montoya; Carlos Alberto Durante Rincon; Jesús Cendros Guasch

Authors

Rafael Roncallo Kelsey
Rossy Rosillo Martinez
Cesar Montoya Universidad Rafael Belloso Chacín – Venezuela
Carlos Alberto Durante Rincon Universidad del Zulia - Venezuela
Jesús Cendros Guasch Universidad Rafael Belloso Chacin

Keywords:

forecast, rain, radio attenuation, troposphere, ARIMA

Abstract

This research project aims to determine the tropospheric radio attenuation due to rainfall, which is the factor that most affects the signals that are transmitted at frequencies above 10Gh. Prediction methodologies exist that are able to estimate the attenuation at any point on the planet. For this study the radio attenuation of two cities of Colombia was analyzed, Medellin and Bogota. Rainfall data used in this research were provided by the IDEAM (Instituto de Hidrología, Meteorología y Estudios Ambientales de Colombia) and processed with software developed by MatLab, the calculation of attenuation was based on ITU Recommendation 618-9. The study is Ex Post Facto, predictive and not experimental. For the development of this research was done following these steps: gathering and validation of rainfall data, collection and processing of rainfall records provided by the IDEAM, application and analysis of prognostic method ARIMA. In the second phase, the results obtained by the forecasting method were evaluated. Similarly, the results were summarized in tables and graphs and finally it was determined the tropospheric radio attenuation forecast by the calculation of the annual radio attenuation after predicted rainfall intensities for different frequencies.

References

BOX, C.E.P.; JENKINS, G.M. (1976). Time series analysis, forecasting and control. Holden Day Inc. USA.

Cardama, A. Cofre, L., Ríus, J. Romeu, J. Blanch S. y Ferrando, M. (2004). Antenas. México: Alfaomega.

Hernández, R., Fernández, C. y Baptista, P. (1998). Metodología de la Investigación. México: McGraw-Hill.

ITU (2005). Specific attenuation model for rain for use in prediction methods. Recommendation ITU-R P.838-3.

López, B. (1999). Metodología de Investigación y Elaboración de Reportes. México: Instituto Tecnológico de Nuevo Laredo.

Muñoz, A., Pacheco, R., Cubillán, N., Durante, C., Durán L., Fermín, J. (2006).Modelling troposfheric radio-attenuation parameters for tropical countries. The Venezuela case. Ciencia, 14(4), 428-434.

Neri, R. (2003). Comunicación Satélital. México: Thomson.

Pérez, C. (2005). Métodos Estadísticos Avanzados con SPSS. España: Thomson. Risquez, G., Fuenmayor, E. y Pereira, B. (1999). Metodología de la Investigación. Maracaibo: Proeduca.

Tomasi, W (2003), Sistemas De Comunicaciones, Editorial Prentice Hall. México

Vargas, H. (2006). Modelo gráfico para el cálculo de parámetros de radio atenuación Troposférica. Tesis de Maestría, Universidad Rafael Belloso Chacín.