Welcome to SpectrumWiki

SpectrumWiki.com is an aggregate of information about the radio spectrum and its many uses. On a band-by-band basis, SpectrumWiki.com contains:

Allocations
Pertinent regulatory footnotes
FCC rule parts
U.S. spectrum auction revenue
Engineering data

Additional information about the radio spectrum is contributed on a crowd-sourced basis through a wiki environment, including:

Spectrum usage (systems and applications)
Regulatory and legislative actions
Band plans
Spectrum measurements
Historical data

and more. Please see below for more information about contributing to SpectrumWiki.

Latest Wiki Entries

Here are a few of the latest new and modified entries in SpectrumWiki:

Airborne Doppler navigation aids

According to BAE Systems, Airborne Doppler navigation aids on a center frequency of 8800 MHz. Doppler Navigation is a self-contained aircraft navigation system developed in the 1940s that uses Doppler effect radar interaction with the earth in dead-reckoning calculations to navigate. Today it is used mostly in rotary aircraft – helicopters. It was also used in commercial fixed-wing aircraft initially for several years, including secondary navigation support in some military planes, before being replaced by global positioning system (GPS) navigation. Doppler navigation systems transmit four frequency-modulated continuous-wave radar beams directed downward at about 45 degrees, fore and aft, at 8,800 MHz. See Footnote 5.470. This information is based on publications as old as 1975.

Frequencies
Frequency	Bandwidth	Use	Service	Table
8800 MHz	-	Airborne Doppler navigation aids	Aeronautical Radionavigation	-

External Links:

BAE Systems webpage on Doppler navigation

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WRC-23 Agenda Item 1.19, Consider New FSS S2E Primary Allocation in Region 2

"to consider a new primary allocation to the fixed-satellite service in the space-to-Earth direction in the frequency band 17.3-17.7 GHz in Region 2, while protecting existing primary services in the band, in accordance with Resolution 174 (WRC-19);"

Frequency Bands
Band	Use	Service	Table
17.3 - 17.7 GHz	Consideration for new FSS space-to-Earth allocation in ITU Region 2	Fixed-satellite (space-to-Earth)	-

External Links:

WRC-23 Agenda

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WRC-23 Agenda Item 1.16, Non-GSO FSS earth stations in motion

"to study and develop technical, operational and regulatory measures, as appropriate, to facilitate the use of the frequency bands 17.7-18.6 GHz and 18.8-19.3 GHz and 19.7-20.2 GHz (space-to-Earth) and 27.5-29.1 GHz and 29.5-30 GHz (Earth-to-space) by non-GSO FSS earth stations in motion, while ensuring due protection of existing services in those frequency bands, in accordance with Resolution 173 (WRC-19);"

Frequency Bands
Band	Use	Service	Table
17.7 - 18.6 GHz	Study for use by non-GSO earth stations in motion (S2E)	Fixed-satellite (space-to-Earth)	-
18.8 - 19.3 GHz	Study for use by non-GSO earth stations in motion (S2E)	Fixed-satellite (space-to-Earth)	-
19.7 - 20.2 GHz	Study for use by non-GSO earth stations in motion (S2E)	Fixed-satellite (space-to-Earth)	-
27.5 - 29.1 GHz	Study for use by non-GSO earth stations in motion (E2S)	Fixed-satellite (Earth-to-space)	-
29.5 - 30 GHz	Study for use by non-GSO earth stations in motion (E2S)	Fixed-satellite (Earth-to-space)	-

External Links:

WRC-23 Agenda

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WRC-23 Agenda Item 1.15 Harmonization of 12.75-13.25 GHz

to harmonize the use of the frequency band 12.75-13.25 GHz (Earth-to-space) by earth stations on aircraft and vessels communicating with geostationary space stations in the fixed-satellite service globally, in accordance with Resolution 172 (WRC-19);"

Frequency Bands
Band	Use	Service	Table
12.75 - 13.25 GHz	Harmonize ESA and ESV with FSS	Fixed-satellite (Earth-to-space)	-

External Links:

WRC-23 Agenda

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WRC-23 Agenda Item 1.14 Possible Adjustments to EESS (passive) Allocations

"to review and consider possible adjustments of the existing or possible new primary frequency allocations to EESS (passive) in the frequency range 231.5-252 GHz, to ensure alignment with more up-to-date remote-sensing observation requirements, in accordance with Resolution 662 (WRC-19);"

Frequency Bands
Band	Use	Service	Table
231.5 - 252 GHz	Review of EESS (passive) Allocations	Earth Exploration-satellite (passive)	-

External Links:

WRC-23 Agenda

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Please Contribute to SpectrumWiki!

SpectrumWiki data come from users like you, who contribute new information and expand or refine existing information. A small amount of data contributed by each of many users helps build a comprehensive knowledgebase of radio spectrum use.

The site is optimized for use by:

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SpectrumWiki does not contain specific license data. Such information is already available through a variety of sources, including

nor does it provide extensive information about the systems that occupy the radio spectrum if such information is available elsewhere. What it does do is organize specific frequency-related information, and makes it easy, through a simple query, to figure out what each radio spectrum band is used for.

The SpectrumWiki philosphy is to collect data about specific systems, applications, measurements, regulatory actions, etc., and the band or bands that are impacted. When a user queries a particular frequency, any relevant information that impacts that frequency will be returned.

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