Maximum Rain-Rate Evaluations in Aegean Archipelagos Hellas for Rain Attenuation Modeling at Microwave Frequencies
Journal Title: TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation - Year 2016, Vol 10, Issue 1
Abstract
By utilizing meteorological data such as relative humidity, temperature, pressure, rain rate and precipitation duration at eight (8) stations in Aegean Archipelagos from six recent years (2007 – 2012), the effect of the weather on Electromagnetic wave propagation is studied. The EM wave propagation characteristics depend on atmospheric refractivity and consequently on Rain-Rate which vary in time and space randomly. Therefore the statistics of radio refractivity, Rain-Rate and related propagation effects are of main interest. This work investigates the maximum value of rain rate in monthly rainfall records, for a 5 min interval comparing it with different values of integration time as well as different percentages of time. The main goal is to determine the attenuation level for microwave links based on local rainfall data for various sites in Greece (L-zone), namely Aegean Archipelagos, with a view on improved accuracy as compared with more generic zone data available. A measurement of rain attenuation for a link in the S-band has been carried out and the data compared with prediction based on the standard ITU-R method.
Authors and Affiliations
Evangelia Karagianni, C. N. Vazouras, E. H. Papageorgiou, A. D. Sarantopoulos, H. E. Nistazakis
Keywords
Related Articles
- EP ID EP193329
- DOI 10.12716/1001.10.01.13
- Views 113
- Downloads 0
Implementation of Voyage Assistant Module in Mobile Navigation System for Inland Waters
Route monitoring is one of the most important functions in modern navigation systems. In case of marine merchant ship’s it usually part of IMO‐standardized solutions like ECDIS or INS. In inland waters Inland ECDIS is im...
Development of Analytical Method for Finding the High Risk Collision Areas
The traffic condition has been analyzed by models that are based on Gas model and Obstacle Zone by Target (OZT) by using 1 year AIS data for Tsunami measure. By applying Gas model based method, it is possible to analyze...
Conversion Timing of Seafarer’s Decision-making for Unmanned Ship Navigation
The aim of this study is to construct an unmanned ship swarms monitoring model to improve autonomous decision-making efficiency and safety performance of unmanned ship navigation. A framework is proposed to determine the...
Vessels Route Planning Problem with Uncertain Data
The purpose of this paper is to find a solution for route planning in a transport networks, where the costs of tracks, factor of safety and travel time are ambiguous. This approach is based on the Dempster-Shafer theory...
Development of Telexistence on a Ship by Using Satellite Communication
Nowadays shipping industry has problems such as reduction of mariners, aging of mariners, and labor expenses. To solve the problems, One Person Bridge Operation was developed as navigation supporting system. However, One...