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:
| |
|
|
|
6 GHz Fixed Service Band
|
|
The 6 GHz fixed service bands are usually the first choice for long microwave links (tens of kilometers or more). The "Lower 6" band at 5925-6425 MHz is shared on a co-primary basis with the Fixed Satellite Service (uplinks), which hinders frequency coordination in some areas.
|
Frequency Bands |
| Band | Use | Service | Table |
| 5925 - 7125 MHz | 6 GHz fixed service links | Fixed | N |
Display in a New page
Edit
|
|
|
|
|
|
NTIA Spectrum Use Summary
|
|
The federal agencies use this band for fixed point-to-point microwave communication systems for national and military test range communications, and the remote transmission of radar video and other data for functions such as weather, vessel traffic control in harbor areas, and hydroelectric grid power management. This includes the Federal Aviation Administration use of this band for fixed point-to-point microwave communications networks to connect remote long-range aeronautical radionavigation radars to air traffic control centers.
The National Aeronautics and Space Administration and the National Oceanographic and Atmospheric Administration use the 6425-7250 MHz band for passive sensing of the Earth from space using microwave radiometers to obtain measurements of sea surface temperature which is a key component in weather forecasting and climatological studies. This band is used in conjunction with passive sensing bands around 10.6, 18.7, 23.8 and 36 GHz to obtain several important climatological parameters.
The NTIA does not issue information on the use of specific band segments in the 7/8 GHz band for fixed links, but the following information is available in a 2000 NTIA Report (NTIA Report 00-378) regarding government fixed service use in the 7125-8500 MHz range:
The FAA has 4,010 fixed assignments, including the radio communications link (RCL) system, a nationwide network used to connect air traffic controllers with communications and radar data from remote radar sites. The Air Force has 710 fixed assignments, used to support a large number of activities on numerous test and training ranges. The Navy has 800 fixed assignments, used mainly in voice and data links, ground forces communication, and land-line back up.
The Army has 450 fixed assignments, used for video scoring, closed circuit TV (security), point-to-point communications training, and for administrative traffic.
DOE has 1,200 fixed assignments used for system control and data acquisition (SCADA) for electric power distribution networks, perimeter security surveillance, laboratory telecommunication systems, and test site surveillance. Justice has 400 fixed assignments, used for fixed backbone nets used in law enforcement communications.
The Coast Guard has 160 fixed assignments, used to relay maritime radar and
communications needed for safety and navigation purposes in harbors and other critical locations. TVA has 140 fixed assignments, used for SCADA for electric power distribution systems.
|
Frequency Bands |
| Band | Use | Service | Table |
| 7125 - 7145 MHz | NTIA Spectrum Use Summary | - Select | F |
Display in a New page
Edit
|
|
|
|
|
|
|
|
Federal Search and Rescue Communications on 243 MHz (NTIA)
|
|
The footnotes 5.111, 5.199, and 5.256 were adopted by the International Telecommunication Union and are incorporated into the U.S. Table of Frequency Allocations. Among other things, these footnotes provide for the use of the 243 MHz frequency for search and rescue purposes.
The frequency 243 MHz is used on the radios onboard most Federal aircraft as a special channel, called a "guard" channel that is used for distress and safety purposes, including search and rescue. The 243 MHz channel is always activated on aircraft and ground systems even though another channel may be in use on a transceiver operating in the band. For example, a military aircraft in distress could make an emergency distress call for assistance on 243 MHz, and all other aircraft or ground stations in the area would hear it immediately and take action.
In general, the band 225-328.6 MHz is reserved for military uses by North Atlantic Treaty Organization (NATO), its member nations, and other U.S. allies. The band is harmonized among NATO-member nations for secure communications.
(Information extracted from the NTIA Federal Government Spectrum Use Reports, dated December 1, 2015)
|
Frequencies |
| Frequency | Bandwidth | Use | Service | Table |
| 243 MHz | 25 kHz | Federal Search and Rescue | Mobile | F |
Display in a New page
Edit
|
|
|
|
|
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:
- Spectrum managers
- Regulators
- Frequency coordinators
- Engineers
- Attorneys
- Economists
and others with an interest in the radio spectrum.
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.
SpectrumWiki is free and open to the public. No registration is required. If you
wish to add new material or edit existing material, we ask that you sign up as a
registered user, for security reasons.
To get started as a contributor, please register then take a quick look at the help
page.