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Allocations

U.S. Non-Federal-Government Allocations

1240 - 1300 MHz
AERONAUTICAL RADIONAVIGATION
Amateur
Earth exploration-satellite (active)
Space research (active)

5.282

U.S. Federal Government Allocations

1240 - 1300 MHz
EARTH EXPLORATION-SATELLITE (active)
RADIOLOCATION G56
SPACE RESEARCH (active)
AERONAUTICAL RADIONAVIGATION

5.332 5.335

ITU Region 1 Allocations

1240 - 1300 MHz
EARTH EXPLORATION-SATELLITE (active)
RADIOLOCATION
RADIONAVIGATION-SATELLITE (space-to-Earth)(space-to-space) 5.328B 5.329 5.329A
SPACE RESEARCH (active)
Amateur

5.282 5.330 5.331 5.332 5.335 5.335A

ITU Region 2 Allocations

1240 - 1300 MHz
EARTH EXPLORATION-SATELLITE (active)
RADIOLOCATION
RADIONAVIGATION-SATELLITE (space-to-Earth)(space-to-space) 5.328B 5.329 5.329A
SPACE RESEARCH (active)
Amateur

5.282 5.330 5.331 5.332 5.335 5.335A

ITU Region 3 Allocations

1240 - 1300 MHz
EARTH EXPLORATION-SATELLITE (active)
RADIOLOCATION
RADIONAVIGATION-SATELLITE (space-to-Earth)(space-to-space) 5.328B 5.329 5.329A
SPACE RESEARCH (active)
Amateur

5.282 5.330 5.331 5.332 5.335 5.335A

SpectrumWiki

Global Positioning System (GPS)

GLONASS

Aeronautical Long Range Surveillance Radars

Aeronautical Terminal Radars

Amateur Radio (23 cm)

Soil Moisture Active Passive (SMAP) Satellite

Footnotes

5.282 In the bands 435-438 MHz, 1260-1270 MHz, 2400-2450 MHz, 3400-3410 MHz (in Regions 2 and 3 only) and 5650-5670 MHz, the amateur-satellite service may operate subject to not causing harmful interference to other services operating in accordance with the Table (see No. 5.43). Administrations authorizing such use shall ensure that any harmful interference caused by emissions from a station in the amateur-satellite service is immediately eliminated in accordance with the provisions of No. 25.11. The use of the bands 1260-1270 MHz and 5650-5670 MHz by the amateur-satellite service is limited to the Earth-to-space direction.

5.328B The use of the bands 1164-1300 MHz, 1559-1610 MHz and 5010-5030 MHz by systems and networks in the radionavigation-satellite service for which complete coordination or notification information, as appropriate, is received by the Radiocommunication Bureau after 1 January 2005 is subject to the application of the provisions of Nos. 9.12, 9.12A and 9.13. Resolution 610 (WRC 03) shall also apply; however, in the case of radionavigation-satellite service (space-to-space) networks and systems, Resolution 610 (WRC-03) shall only apply to transmitting space stations. In accordance with No. 5.329A, for systems and networks in the radionavigation-satellite service (space-to-space) in the bands 1215-1300 MHz and 1559-1610 MHz, the provisions of Nos. 9.7, 9.12, 9.12A and 9.13 shall only apply with respect to other systems and networks in the radionavigation-satellite service (space-to-space). (WRC-07)

5.329 Use of the radionavigation-satellite service in the band 1215-1300 MHz shall be subject to the condition that no harmful interference is caused to, and no protection is claimed from, the radionavigation service authorized under No. 5.331. Furthermore, the use of the radionavigation-satellite service in the band 1215-1300 MHz shall be subject to the condition that no harmful interference is caused to the radiolocation service. No. 5.43 shall not apply in respect of the radiolocation service. Resolution 608 (WRC-03) shall apply.

5.329A Use of systems in the radionavigation-satellite service (space-to-space) operating in the bands 1215-1300 MHz and 1559-1610 MHz is not intended to provide safety service applications, and shall not impose any additional constraints on radionavigation-satellite service (space-to-Earth) systems or on other services operating in accordance with the Table of Frequency Allocations. (WRC-07)

5.330 Additional allocation: in Angola, Saudi Arabia, Bahrain, Bangladesh, Cameroon, China, the United Arab Emirates, Eritrea, Ethiopia, Guyana, India, Indonesia, Iran (Islamic Republic of), Iraq, Israel, the Libyan Arab Jamahiriya, Japan, Jordan, Kuwait, Lebanon, Mozambique, Nepal, Pakistan, the Philippines, Qatar, the Syrian Arab Republic, Somalia, Sudan, Chad, Togo and Yemen, the band 1215-1300 MHz is also allocated to the fixed and mobile services on a primary basis.

5.331 Additional allocation: in Algeria, Germany, Saudi Arabia, Australia, Austria, Bahrain, Belarus, Belgium, Benin, Bosnia and Herzegovina, Brazil, Burkina Faso, Burundi, Cameroon, China, Korea (Rep. of), Croatia, Denmark, Egypt, the United Arab Emirates, Estonia, the Russian Federation, Finland, France, Ghana, Greece, Guinea, Equatorial Guinea, Hungary, India, Indonesia, Iran (Islamic Republic of), Iraq, Ireland, Israel, Jordan, Kenya, Kuwait, The Former Yugoslav Republic of Macedonia, Lesotho, Latvia, Lebanon, Liechtenstein, Lithuania, Luxembourg, Madagascar, Mali, Mauritania, Montenegro, Nigeria, Norway, Oman, the Netherlands, Poland, Portugal, Qatar, the Syrian Arab Republic, Dem. People's Rep. of Korea, Slovakia, the United Kingdom, Serbia, Slovenia, Somalia, Sudan, Sri Lanka, South Africa, Sweden, Switzerland, Thailand, Togo, Turkey, Venezuela and Viet Nam, the band 1215 1300 MHz is also allocated to the radionavigation service on a primary basis. In Canada and the United States, the band 1240-1300 MHz is also allocated to the radionavigation service, and use of the radionavigation service shall be limited to the aeronautical radionavigation service. (WRC-07)

5.332 In the band 1215-1260 MHz, active spaceborne sensors in the Earth exploration-satellite and space research services shall not cause harmful interference to, claim protection from, or otherwise impose constraints on operation or development of the radiolocation service, the radionavigation-satellite service and other services allocated on a primary basis.

5.335 In Canada and the United States in the band 1240-1300 MHz, active spaceborne sensors in the Earth exploration-satellite and space research services shall not cause interference to, claim protection from, or otherwise impose constraints on operation or development of the aeronautical radionavigation service. (FCC)

5.335A In the band 1260-1300 MHz, active spaceborne sensors in the Earth exploration-satellite and space research services shall not cause harmful interference to, claim protection from, or otherwise impose constraints on operation or development of the radiolocation service and other services allocated by footnotes on a primary basis.

G56 Federal radiolocation in the bands 1215-1300, 2900-3100, 5350-5650 and 9300-9500 MHz is primarily for the military services; however, limited secondary use is permitted by other Federal agencies in support of experimentation and research programs. In addition, limited secondary use is permitted for survey operations in the band 2900-3100 MHz.

SpectrumWiki

Global Positioning System (GPS)

The Global Positioning System (GPS) is a U.S.-owned utility that provides users with positioning, navigation, and timing (PNT) services. This system consists of three segments: the space segment, the control segment, and the user segment. The U.S. Air Force develops, maintains, and operates the space and control segments.

GPS satellites provide service to civilian and military users. The civilian service is freely available to all users on a continuous, worldwide basis. The military service is available to U.S. and allied armed forces as well as approved Government agencies.

The specified minimum signal strength on the ground for GPS is:

L1 P(Y):	-161.5 dBW
L1 C/A:	-158.5 dBW
L2 P(Y):	-161.5 dBW
L2 C:	-158.5 dBW
L5 (I5 & Q5):	-157.0 dBW

The first of 32 next-generation GPS satellites (GPS III) is scheduled to be launced in 2014. The new system isn't expected to have widespread availability before approximately 2020.

Frequencies
Frequency	Bandwidth	Use	Service	Table
1176.45 MHz	24 MHz	GPS Link 5 (L5)	Radionavigation-satellite	F
1227.6 MHz	30.69 MHz	GPS Link 2 (L2)	Radionavigation-satellite	F
1379.913 MHz	-	GPS Link 4 (L4)	Radionavigation-satellite	F
1381.05 MHz	-	GPS Link 3 (L3)	Radionavigation-satellite	F
1575.42 MHz	30.69 MHz	GPS Link 1 (L1)	Radionavigation-satellite	F

External Links:

GPS L5 Interface Specification IS-GPS-705

Global Positioning System (Wikipedia)

GPS Interface Specification IS-GPS-200 Rev E

Official U.S. Government Website for GPS

A basic technical introduction to GPS by Prof. Eric Calais of Purdue University

Air Force Memo on Approved Lexicon of GPS Signal Abbreviations

Explanation of New GPS Civil Signals L2C, L5, and L1C

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GLONASS

GLONASS is a Russian radionavigation satellite system that serves a similar purpose to the U.S. GPS system.

GLONASS uses a series of narrow-band FDMA signals, compared to the wideband CDMA signals used by GPS.

The center frequency of the L1 signals are given by the formula

f_L1(k) = (1602.0 + 0.5625k) MHz, k = -7 .. +6

The L2 signal center frequencies can be derived from the L1 frequencies:

f_L2(k) = (7/9) x f_L1(k)

The bandwidth of the standard precision GLONASS signal is approximately 1 MHz, while the bandwidth of the high precision signal bandwidth is approximately 9 MHz. Both signals are modulated onto the same carrier.

The GLONASS signals are transmitted with a power between 25-27 dBW using right hand circular polarization.

Russia is in the process of upgrading the GLONASS signal structure to use CDMA modulation, essentially identical to the signal structure used for GPS.

The iPhone 4S incorporates a GLONASS receiver, in addition to GPS.

Frequencies
Frequency	Bandwidth	Use	Service	Table
1242.9375 MHz	9 MHz	GLONASS L2 (k=-7)	Radionavigation-satellite	-
1243.375 MHz	9 MHz	GLONASS L2 (k=-6)	Radionavigation-satellite	-
1243.8125 MHz	9 MHz	GLONASS L2 (k=-5)	Radionavigation-satellite	-
1244.25 MHz	9 MHz	GLONASS L2 (k=-4)	Radionavigation-satellite	-
1244.6875 MHz	9 MHz	GLONASS L2 (k=-3)	Radionavigation-satellite	-
1245.125 MHz	9 MHz	GLONASS L2 (k=-2)	Radionavigation-satellite	-
1245.5625 MHz	9 MHz	GLONASS L2 (k=-1)	Radionavigation-satellite	-
1246 MHz	9 MHz	GLONASS L2 (k=0)	Radionavigation-satellite	-
1246.4375 MHz	9 MHz	GLONASS L2 (k=1)	Radionavigation-satellite	-
1246.875 MHz	9 MHz	GLONASS L2 (k=2)	Radionavigation-satellite	-
1247.3125 MHz	9 MHz	GLONASS L2 (k=3)	Radionavigation-satellite	-
1247.75 MHz	9 MHz	GLONASS L2 (k=4)	Radionavigation-satellite	-
1248.1875 MHz	9 MHz	GLONASS L2 (k=5)	Radionavigation-satellite	-
1248.625 MHz	9 MHz	GLONASS L2 (k=6)	Radionavigation-satellite	-
1598.0625 MHz	9 MHz	GLONASS L1 (k=-7)	Radionavigation-satellite	-
1598.625 MHz	9 MHz	GLONASS L1 (k=-6)	Radionavigation-satellite	-
1599.1875 MHz	9 MHz	GLONASS L1 (k=-5)	Radionavigation-satellite	-
1599.75 MHz	9 MHz	GLONASS L1 (k=-4)	Radionavigation-satellite	-
1600.3125 MHz	9 MHz	GLONASS L1 (k=-3)	Radionavigation-satellite	-
1600.875 MHz	9 MHz	GLONASS L1 (k=-2)	Radionavigation-satellite	-
1601.4375 MHz	9 MHz	GLONASS L1 (k=-1)	Radionavigation-satellite	-
1602 MHz	9 MHz	GLONASS L1 (k=0)	Radionavigation-satellite	-
1602.5625 MHz	9 MHz	GLONASS L1 (k=1)	Radionavigation-satellite	-
1603.125 MHz	9 MHz	GLONASS L1 (k=2)	Radionavigation-satellite	-
1603.6875 MHz	9 MHz	GLONASS L1 (k=3)	Radionavigation-satellite	-
1604.25 MHz	9 MHz	GLONASS L1 (k=4)	Radionavigation-satellite	-
1604.8125 MHz	9 MHz	GLONASS L1 (k=5)	Radionavigation-satellite	-
1605.375 MHz	9 MHz	GLONASS L1 (k=6)	Radionavigation-satellite	-

External Links:

GLONASS (Wikipedia)

Poster of GNSS Satellite Signal Structure (NovAtel)

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Aeronautical Long Range Surveillance Radars

Long range surveillance radars are used for air traffic control purposes. Long range radars are able to detect objects as small as 1-2 m^2 cross section out to distances as far as 200-250 nautical miles.

In the United States, there are approximately 130 long range surveillance radars spread across the country as part of the Joint Surveillance System (JSS), shared among FAA, DoD, and the Department of Homeland Security.

Long range surveillance radars can also be used for weather detection, by switching from vertical polarization (for aircraft detection) to circular polarization mode. They can also be used as terminal radars (for monitoring traffic closer-in to airports), under conditions of greater-than-normal separation between aircraft.

The scan time (rotation rate) for long range radars is 12 seconds, which provides position updates for aircraft five times each minute.

Frequency Bands
Band	Use	Service	Table
1240 - 1370 MHz	Aeronautical long range surveillance radars	Aeronautical Radionavigation	-

External Links:

Joint Surveillance System (JSS), including table of radar locations (Wikipedia)

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Aeronautical Terminal Radars

Terminal radars are installed at busy airports to monitor air traffic in the vicinity of the airport. Terminal radars have shorter range than long range surveillance radars, but rotate more quickly (4.8 seconds instead of 12).

In the United States, terminal radars are installed at approximately 300 airports.

Frequency Bands
Band	Use	Service	Table
1240 - 1370 MHz	Aeronautical terminal radars	Aeronautical Radionavigation	-

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Amateur Radio (23 cm)

The amateur service has a secondary allocation in this band worldwide. According to the ITU, this band is "used for short-range communications and for experimentation."

In the United States, the ARRL has adopted the following band plan. This band plan may apply in other countries as well:

1240-1246 ATV #1
1246-1248 Narrow-bandwidth FM point-to-point links and digital, duplex with 1258-1260.
1248-1258 Digital Communications
1252-1258 ATV #2
1258-1260 Narrow-bandwidth FM point-to-point links digital, duplexed with 1246-1252
1260-1270 Satellite uplinks, reference WARC '79
1260-1270 Wide-bandwidth experimental, simplex ATV
1270-1276 Repeater inputs, FM and linear, paired with 1282-1288, 239 pairs every 25 kHz, e.g. 1270.025, .050, etc.
1271-1283 Non-coordinated test pair
1276-1282 ATV #3
1282-1288 Repeater outputs, paired with 1270-1276
1288-1294 Wide-bandwidth experimental, simplex ATV
1294-1295 Narrow-bandwidth FM simplex services, 25-kHz channels
1294.5 National FM simplex calling frequency
1295-1297 Narrow bandwidth weak-signal communications (no FM)
1295.0-1295.8 SSTV, FAX, ACSSB, experimental
1295.8-1296.0 Reserved for EME, CW expansion
1296.00-1296.05 EME-exclusive
1296.07-1296.08 CW beacons
1296.1 CW, SSB calling frequency
1296.4-1296.6 Crossband linear translator input
1296.6-1296.8 Crossband linear translator output
1296.8-1297.0 Experimental beacons (exclusive)
1297-1300 Digital Communications

Frequency Bands
Band	Use	Service	Table
1240 - 1300 MHz	Amateur radio 23 cm band	AM	N

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Soil Moisture Active Passive (SMAP) Satellite

The Soil Moisture Active Passive (SMAP) satellite is a planned NASA satellite mission to monitor soil moisture around the globe. It is planned for launch in 2014.

As its name implies, the Soil Moisture Active Passive (SMAP) satellite uses active and passive radio systems to measure soil moisture around the globe. The spacecraft is in a sun-syncronous orbit that passes overhead of its target areas around 6 AM and 6 PM, approximately every 3 days at the equator and every 2 days at high latitudes.

SMAP's sensors can determine soil moisture down to a depth of approximately 5-10 cm. The active radar provides approximately 3 km resolution on the ground, using a 6 m antenna and measuring reflections in HH, VV, and HV polarization modes. The radar works in frequency hopping mode to avoid interference to and from aviation radars that operate in the same band. The instantaneous signal from the radar consists of two separate signals each of ~1.4 MHz bandwidth, separated by 5 MHz. It pulses every ~354 microseconds, for a duration of ~10-20 microseconds per pulse. The radar transmit power (not EIRP) is a few hundred watts.

SMAP will operate in a circular orbit of 670 km altitude. The ground footprint of the radar is approximately 1000 km. Resolution of the radar in low-resolution mode is approximately 40 km, and in high-resolution mode the resolution is approximately 3 km.

Soil moisture data can be used for improving numerical weather prediction, including seasonal climate prediction and rainfall prediction.

Like the European SMOS satellite, it is anticipated that SMAP's passive sensor will be subject to illegal RFI in the passive-only 1400-1427 MHz band.

Frequency Bands
Band	Use	Service	Table
1200 - 1300 MHz	SMAP active radar	Earth Exploration-satellite	F
1400 - 1427 MHz	SMAP passive radiometer	Earth Exploration-satellite	F

External Links:

SMAP Web (NASA/JPL)

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Occupancy Measurements (10)

Band Plan (2)

Other (1)

Engineering Data

	Lower Frequency	Center Frequency	Upper Frequency
Frequency	1240 MHz	1270 MHz	1300 MHz
Wavelength	24.2 cm	23.6 cm	23.1 cm
Band designator(s)	UHF; L-band (IEEE)	UHF; L-band (IEEE)	UHF; L-band (IEEE)
Isotropic collecting area	46.5 cm²	44.3 cm²	42.3 cm²
Free space loss (1 m)	34.3 dB	34.5 dB	34.7 dB
Free space loss (1 km)	94.3 dB	94.5 dB	94.7 dB
Free space loss (10 km)	114.3 dB	114.5 dB	114.7 dB
Free space loss (100 km)	134.3 dB	134.5 dB	134.7 dB
Free space loss (1000 km)	154.3 dB	154.5 dB	154.7 dB
Free space loss (35,786 km = GEO orbit)	185.4 dB	185.6 dB	185.8 dB
Free space loss (378,370 km = Moon)	205.9 dB	206.1 dB	206.3 dB