223
edits
Radio propagation: Difference between revisions
Jump to navigation
Jump to search
no edit summary
No edit summary |
No edit summary |
||
| Line 49: | Line 49: | ||
It is a general purpose model that can be applied to a large variety of engineering problems. The model, which is based on electromagnetic theory and on statistical analysis of both terrain features and radio measurements, predicts the median attenuation of a radio signal as a function of distance and the variability of the signal in time and in space.<ref>http://www.its.bldrdoc.gov/resources/radio-propagation-software/itm/itm.aspx</ref> <ref>http://web.archive.org/web/20110721032828/http://flattop.its.bldrdoc.gov/itm.html</ref> | It is a general purpose model that can be applied to a large variety of engineering problems. The model, which is based on electromagnetic theory and on statistical analysis of both terrain features and radio measurements, predicts the median attenuation of a radio signal as a function of distance and the variability of the signal in time and in space.<ref>http://www.its.bldrdoc.gov/resources/radio-propagation-software/itm/itm.aspx</ref> <ref>http://web.archive.org/web/20110721032828/http://flattop.its.bldrdoc.gov/itm.html</ref> | ||
It is currently used among others by NASA, Alcatel-Lucent, US Army, University of Massachusetts and amateur radio operators around the world, and is widely considered the best propagation model for frequencies between 50 - 5000 Mhz freely available to the public. | It is currently used among others by NASA, Alcatel-Lucent, US Army, University of Massachusetts and amateur radio operators around the world, and is widely considered the best propagation model for frequencies between 50 - 5000 Mhz freely available to the public. | ||
One of the most active users of the Irregular Terrain Model is the US FCC (Federal Communications Commission), which is currently applying the updated version of this model for broadcast station regulations <ref>http://broadcastengineering.com/transmitters/fcc-proposes-updated-longley-rice-model-repack-tv-stations</ref> | |||
===Rationale=== | ===Rationale=== | ||