Satellite Communications in the Ku Band for Disaster Recovery Purposes

This paper describes how satellite is a good communication system for disaster recovery and civil protection operations. However, the reliability of the communication must be ensured with respect to the operative scenario to be faced. The major parameter concerning the reliability of a satellite link is the outage probability, P(o), i.e. the time per year over which the link is down. P(o) mainly depends on the occurrence of rain attenuation along the radio path. For commercial systems it is customary to accept a P(o) about 10(-3), which means 9 hours per year. But, if we consider communication systems facing a flood, those hours can be exactly when the system is required to operate. For this reason, system requirements must be rethought. Moreover, lower frequency bands are virtually immune to radio attenuation, but are crowed, expensive and require larger antennas. It makes sense then to explore the possibility of reliable all-weather communication using higher bands (namely Ku and Ka), which are more sensitive to attenuation but less expensive. Research was performed, in cooperation with Eutelsat, Italian Civil Protection Department and the Italian Fire Department in order to address these issues. The first step was to analyze rain measurements taken by a meteorological radar during relevant rain events, in order to estimate the actual rain attenuation that can be experienced during a real operative scenario. The second step was to set up a mobile satellite link, in the Ku band, to stress the suitability of this band for all-weather communication. The research has shown the values of attenuation that can be experienced and the Ku band can guarantee a less expensive alternative for emergency purposes, while the Ka band remains too unreliable, at least without the use of next generation regenerative satellites. The paper also shows the system dimensioning for reliable use of the Ku band.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/1845640195
• Corporate Authors:

  WIT Press

  Ashurst Lodge
  Ashurst, Southampton  United Kingdom  SO40 7AA
• Authors:
  • Marcovina, M
  • Perona, G
  • Albanese, V
  • Zambotto, M
• Conference:
  • The First International Conference on Safety and Security Engineering (SAFE/05)
  • Location: Rome , Italy
  • Date: 2005-6-13 to 2005-6-15
• Publication Date: 2005-6

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 735-744
• Monograph Title: Safety and Security Engineering

Subject/Index Terms

• TRT Terms: Attenuation (Engineering); Civil defense; Disaster preparedness; Disaster relief; Emergency response time; Flood protection; Protection; Rainfall; Reliability; Satellite communication; Weather conditions
• Geographic Terms: Italy
• Subject Areas: Highways; Safety and Human Factors; Security and Emergencies; I83: Accidents and the Human Factor;

Filing Info

• Accession Number: 01007134
• Record Type: Publication
• ISBN: 1845640195
• Files: TRIS
• Created Date: Nov 11 2005 2:15PM