S band

S-bandSS-(9.1 cm)10 cm band2 GHz band2.4 GHz wireless spectrummobile satellite serviceMode-SS" band
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz).wikipedia
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Microwave

microwavesmicrowave radiationmicrowave tube
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz).
Frequencies in the microwave range are often referred to by their IEEE radar band designations: S, C, X, K u, K, or K a band, or by similar NATO or EU designations.

Ultra high frequency

UHFUHF bandultra-high frequency
Thus it crosses the conventional boundary between the UHF and SHF bands at 3.0 GHz.
Two other IEEE radar bands overlap the ITU UHF band: the L band between 1 and 2 GHz and the S band between 2 and 4 GHz.

Airport surveillance radar

ASRASR-8Digital Airport Surveillance Radar
The S band is used by airport surveillance radar for air traffic control, weather radar, surface ship radar, and some communications satellites, especially those used by NASA to communicate with the Space Shuttle and the International Space Station.
In the US the primary radar operates at a frequency of 2.7 - 2.9 GHz in the S band with a peak radiated power of 25 kW and an average power of 2.1 kW.

Super high frequency

SHFSHF-bandsuper-high frequency
Thus it crosses the conventional boundary between the UHF and SHF bands at 3.0 GHz.
Frequencies in the SHF range are often referred to by their IEEE radar band designations: S, C, X, K u, K, or K a band, or by similar NATO or EU designations.

Weather radar

Doppler weather radarradarDoppler radar
The S band is used by airport surveillance radar for air traffic control, weather radar, surface ship radar, and some communications satellites, especially those used by NASA to communicate with the Space Shuttle and the International Space Station.
Thus 10 cm (S-band) radar is preferred but is more expensive than a 5 cm C-band system.

Radio spectrum

bandradio bandspectrum
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz).

Space Shuttle

Shuttlespace shuttlesSpace Shuttle Program
The S band is used by airport surveillance radar for air traffic control, weather radar, surface ship radar, and some communications satellites, especially those used by NASA to communicate with the Space Shuttle and the International Space Station.
While in orbit, the crew primarily communicated using one of four S band radios, which provided both voice and data communications.

Satellite radio

satelliteradiosubscription radio
The 2.6 GHz range is used for China Multimedia Mobile Broadcasting, a satellite radio and mobile TV standard which, as with proprietary systems in the U.S., is incompatible with the open standards used in the rest of the world.
Satellite radio uses the 2.3 GHz S band in North America for nationwide digital radio broadcasting.

International Space Station

ISSInternational Space Station (ISS)Space Station
The S band is used by airport surveillance radar for air traffic control, weather radar, surface ship radar, and some communications satellites, especially those used by NASA to communicate with the Space Shuttle and the International Space Station.
The US Orbital Segment (USOS) makes use of two separate radio links mounted in the Z1 truss structure: the S band (audio) and K u band (audio, video and data) systems.

Digital audio radio service

SDARSDARSdigital audio radio satellite
In the U.S., the FCC approved satellite-based Digital Audio Radio Service (DARS) broadcasting in the S band from 2.31 to 2.36 GHz, currently used by Sirius XM Radio.
XM and Sirius both operate in the 2.3-GHz S band, from 2320 to 2345 MHz.

Radar

radar stationradarsradar system
The S band is used by airport surveillance radar for air traffic control, weather radar, surface ship radar, and some communications satellites, especially those used by NASA to communicate with the Space Shuttle and the International Space Station.

NEXRAD

WSR-88Ddoppler radardual-polarization NEXRAD radar
The National NEXRAD Radar network operates with S-band frequencies.
NEXRAD or Nexrad (Next-Generation Radar) is a network of 159 high-resolution S-band Doppler weather radars operated by the National Weather Service (NWS), an agency of the National Oceanic and Atmospheric Administration (NOAA) within the United States Department of Commerce, the Federal Aviation Administration (FAA) within the Department of Transportation, and the U.S. Air Force within the Department of Defense.

Indian Regional Navigation Satellite System

NAVICIRNSSIndian Regional Navigational Satellite System
India's regional satellite navigation network (IRNSS) broadcasts on 2.483778 to 2.500278 GHz.
The navigation signals themselves would be transmitted in the S-band frequency (2–4 GHz) and broadcast through a phased array antenna to maintain required coverage and signal strength.

EchoStar Mobile

Solaris Mobile
In May 2009, Inmarsat and Solaris Mobile (a joint venture between Eutelsat and SES, now EchoStar Mobile) were awarded each a 2×15 MHz portion of the S band by the European Commission.
The S-band frequencies used (2.00 GHz) are reserved for the exclusive use of satellite and terrestrial mobile services, and sit alongside the UMTS frequencies already in use across Europe for 3G terrestrial mobile phone services, allowing the reuse of existing cellular towers and antennas, and the simple incorporation of Solaris services in mobile handsets.

Sirius XM

Sirius XM RadioSiriusXMSirius XM Satellite Radio
In the U.S., the FCC approved satellite-based Digital Audio Radio Service (DARS) broadcasting in the S band from 2.31 to 2.36 GHz, currently used by Sirius XM Radio.
Sirius satellites broadcast within the S band frequencies from 2.3200–2.3325 GHz, while XM radio uses adjacent frequencies 2.3325–2.3450 GHz.

Federal Communications Commission

FCCU.S. Federal Communications CommissionFederal Communications Commission (FCC)
In the U.S., the FCC approved satellite-based Digital Audio Radio Service (DARS) broadcasting in the S band from 2.31 to 2.36 GHz, currently used by Sirius XM Radio. In the United States, the 3.55 to 3.7 GHz band is becoming shared spectrum under rules adopted by the Federal Communications Commission in April 2015 as a result of the National Broadband Plan (United States).
Had the FCC picked DAB-T for terrestrial radio, no separate satellite receiver would have been needed at all, and the only difference from DAB receivers in the rest of the world would be the need to tune S band instead of L band.

Inmarsat

Inmarsat-5Global XpressClassic Aero
In May 2009, Inmarsat and Solaris Mobile (a joint venture between Eutelsat and SES, now EchoStar Mobile) were awarded each a 2×15 MHz portion of the S band by the European Commission.
Inmarsat's S-band satellite programme will deliver mobile multimedia broadcast, mobile two-way broadband telecommunications and next-generation MSS services across all member states of the European Union and as far east as Moscow and Ankara by means of a hybrid satellite/terrestrial network.

Unified S-band

S-bandcoherent transpondersUnified S-Band System
It operated in the S band portion of the microwave spectrum, unifying voice communications, television, telemetry, command, tracking and ranging into a single system to save size and weight and simplify operations.

C band (IEEE)

C bandC-bandC
Before implementation of this system, C-band frequencies were commonly used for weather surveillance.
Note that by using the band from 3.7 to 4.0 GHz, this C band overlaps somewhat into the IEEE S band for radars.

National Broadband Plan (United States)

National Broadband PlanConnectEDConnect America Fund
In the United States, the 3.55 to 3.7 GHz band is becoming shared spectrum under rules adopted by the Federal Communications Commission in April 2015 as a result of the National Broadband Plan (United States).
The plan targets space between 225 MHz and 3.7 GHz; 120 MHz of Broadcast TV and 90 MHz of mobile satellite service.

Apollo program

ApolloProject ApolloApollo space program
A high-gain S-band antenna was used for long-distance communications on the lunar flights.

IndoStar-1

Cakrawarta-1
IndoStar-1 was the world's first commercial communications satellite to use S-band frequencies for broadcast (pioneered by van der Heyden), which efficiently penetrate the atmosphere and provide high-quality transmissions to small-diameter 80 cm antennas in regions that experience heavy rainfall such as Indonesia.

Electromagnetic spectrum

spectrumspectraspectral
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz).

Frequency

frequenciesperiodperiodic
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz).

Hertz

MHzkHzHz
The S band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a part of the microwave band of the electromagnetic spectrum covering frequencies from 2 to 4 gigahertz (GHz).