X-band (8175 10000 mhz) spectrum summary



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X-Band (8175 - 10000 MHz) SPECTRUM SUMMARY

Summary: X-Band is used primarily for aeronautical radio-navigation and radiolocation. Monitoring of this band indicates that the signals, when present, can be very strong but the use of the band is very variable.


Frequency (MHz): 8175-8215
Allocated Use: EARTH EXPLORATION- SATELLITE (space-to-Earth)

FIXED-SATELLITE (Earth-to-space)

METEOROLOGICAL- SATELLITE (Earth-to-space)

Mobile-satellite (Earth-to- space) (no airborne transmissions)


Remarks: In the band 8025-8400 MHz, the Earth exploration-satellite service (space-to-Earth) is allo­cated on a primary basis for non-Federal Government use. Authorizations are subject to a case-by-case electromagnetic compatibility analysis.
In the bands 7450-7550 and 8175-8215 MHz, it is agreed that although the military space radio communication systems, which include earth stations near the proposed meteorological-satellite instal­lations will precede the meteorological-satellite installations, engineering adjustments to either the mil­itary or the meteorological-satellite systems or both will be made as mutually required to assure compatible operations of the systems concerned.
In the bands 7.25-7.75 GHz, 7.9-8.4 GHz, 17.8-21.2 GHz, 30-31 GHz, 33-36 GHz, 39.5-41 GHz, 43.5-45.5 GHz, and 50.4-51.4 GHz, the Government fixed-satellite and mobile-satellite services are limited to military systems.

Frequency (MHz): 8215-8400
Allocated Use: EARTH EXPLORATION- SATELLITE (space-to- Earth)

FIXED-SATELLITE (Earth-to-space)

Mobile-satellite (Earth-to- space) (no airborne transmissions)
Remarks: In the band 8025-8400 MHz, the Earth exploration-satellite service (space-to-Earth) is allocated on a primary basis for non-Federal Government use. Authorizations are subject to a case-by-case electromagnetic compatibility analysis.
In the bands 7.25-7.75 GHz, 7.9-8.4 GHz, 17.8-21.2 GHz, 30-31 GHz, 33-36 GHz, 39.5-41 GHz, 43.5-45.5 GHz, and 50.4-51.4 GHz, the Government fixed-satellite and mobile-satellite services are limited to military systems.
Frequency (MHz): 8400-8450
Allocated Use: FIXED SPACE RESEARCH (space-to-Earth) (deep space only)
Frequency (MHz): 8500-8550
Allocated Use: RADIOLOCATION
Remarks: In the bands 902-928 MHz, 3100-3300 MHz, 3500-3650 MHz, 5250-5350 MHz, 8500-9000 MHz, 9200-9300 MHz, 13.4-14.0 GHz, 15.7-17.7 GHz and 24.05-24.25 GHz, all Government non-military radiolocation shall be secondary to military radiolocation, except in the sub-band 15.7-16.2 GHz airport surface detection equipment (ASDE) is permitted on a co-equal basis subject to coordination with the military departments.
Frequency (MHz): 8550-8650
Allocated Use: EARTH EXPLORATION-SATELLITE (active) RADIOLOCATION

SPACE RESEARCH (active)


Remarks: In the bands 902-928 MHz, 3100-3300 MHz, 3500-3650 MHz, 5250-5350 MHz, 8500-9000 MHz, 9200-9300 MHz, 13.4-14.0 GHz, 15.7-17.7 GHz and 24.05-24.25 GHz, all Government non-military radiolocation shall be secondary to military radiolocation, except in the sub-band 15.7-16.2 GHz airport surface detection equipment (ASDE) is permitted on a co-equal basis subject to coordination with the military departments.
Frequency (MHz): 8650-9000
Allocated Use: RADIOLOCATION
Remarks: In the bands 902-928 MHz, 3100-3300 MHz, 3500-3650 MHz, 5250-5350 MHz, 8500-9000 MHz, 9200-9300 MHz, 13.4-14.0 GHz, 15.7-17.7 GHz and 24.05-24.25 GHz, all Government non-military radiolocation shall be secondary to military radiolocation, except in the sub-band 15.7-16.2 GHz airport surface detection equipment (ASDE) is permitted on a co-equal basis subject to coordination with the military departments
In view of the fact that the band 13.25-13.4 GHz is allocated to doppler navigation aids, Government, and non-Government airborne doppler radars in the aeronautical radionavigation service are permitted in the band 8750-8850 MHz only on the condition that they must accept any interference that may be experienced from stations in the radiolocation service in the band 8500-10000 MHz.
Frequency (MHz): 9000-9200
Allocated Use: AERONAUTICAL RADIO- NAVIGATION

Radiolocation


Remarks: The use of the bands 1300-1350 MHz, 2700-2900 MHz and 9000-9200 MHz by the aeronautical radionavigation service is restricted to ground-based radars and to associated airborne transponders which transmit only on frequencies in these bands and only when actuated by radars operating in the same band.
In the bands 216-225 MHz, 420-450 MHz (except as provided by US217 and G129), 890-902 MHz, 928-942 MHz, 1300-1400 MHz, 2310-2385 MHz, 2417-2450 MHz, 2700-2900 MHz, 5650-5925 MHz, and 9000-9200 MHz, Federal Government use of the radiolocation service is limited to the military services.
In the band 9000-9200 MHz, the use of the radiolocation service by non-Federal Government licensees may be authorized on the condition that harmful interference is not caused to the aeronautical radionavigation service or to the Federal Government radiolocation service.
Use of the band 9000-9200 MHz by military fixed and shipborne air defense radiolocation installations will be fully coordinated with the aeronautical radionavigation service, recognizing fully the safety aspects of the latter. Military air defense installations will be accommodated ultimately out-side this band. Until such time as military defense installations can be accommodated satisfactorily elsewhere in the spectrum such operations will, insofar as practicable, be adjusted to meet the requirements of the aeronautical radionavigation services.
Frequency (MHz): 9200-9300
Allocated Use: MARITIME RADIO- NAVIGATION

Radiolocation


Remarks: In the bands 8850-9000 MHz and 9200-9225 MHz, the maritime radionavigation service is limited to shore-based radars.
In the band 9200-9300 MHz, the use of the radiolocation service by non-Federal Government licensees may be authorized on the condition that harmful interference is not caused to the maritime radionavigation service or to the Federal Government radiolocation service.
In the bands 902-928 MHz, 3100-3300 MHz, 3500-3650 MHz, 5250-5350 MHz, 8500-9000 MHz, 9200-9300 MHz, 13.4-14.0 GHz, 15.7-17.7 GHz and 24.05-24.25 GHz, all Government non-military radiolocation shall be secondary to military radiolocation, except in the sub-band 15.7-16.2 GHz airport surface detection equipment (ASDE) is permitted on a co-equal basis subject to coordination with the military departments.

In the band 9200-9500 MHz, search and rescue transponders (SART) may be used, having due regard to the appropriate ITU-R Recommendation.


Frequency (MHz): 9300-9500
Allocated Use: RADIONAVIGATION

Radiolocation

Meteorological aids
Remarks: In the band 9300-9320 MHz in the radionavigation service, the use of shipborne radars, other than those existing on 1 January 1976, is not permitted until 1 January 2001.
In the band 9500-9800 MHz, stations in the earth exploration-satellite service (active) and space research service (active) shall not cause harmful interference to, or constrain the use and development of, stations of the radionavigation and radiolocation services. 
The use of the band 9300–9500 MHz by the aeronautical radionavigation service is limited to airborne radars and associated airborne beacons. In addition, ground-based radar beacons in the aeronautical radionavigation service are permitted in the band 9300-9320 MHz on the condition that harmful interference is not caused to the maritime radionavigation service.

In the band 9300-9500 MHz, the radiolocation service may be authorized for non-Federal Government use on the condition that harmful interference is not caused to the Federal Government radiolocation service.


Government 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 Government agencies in support of experimentation and research programs. In addition, limited secondary use is permitted for survey operations in the band 2900-3100 MHz.
In the bands 2900-3100 MHz and 9300-9500 MHz, the response from radar transponders shall not be capable of being confused with the response from radar beacons (racons) and shall not cause interference to ship or aeronautical radars in the radionavigation service.
In the band 9200-9500 MHz, search and rescue transponders (SART) may be used, having due regard to the appropriate ITU-R Recommendation.
The use of the band 9300-9500 MHz by the meteorological aids service is limited to ground-based radars. Radiolocation installations will be coordinated with the meteorological aids service and, insofar as practicable; will be adjusted to meet the requirements of the meteorological aids service.
In the band 9300-9320 MHz, low-powered maritime radionavigation stations shall be protected from harmful interference caused by the operation of land-based equipment.
Frequency (MHz): 9500-9800
Allocated Use: EARTH EXPLORATION-SATELLITE (active)

RADIOLOCATION

RADIONAVIGATION

SPACE RESEARCH (active)


Frequency (MHz): 9800-10000
Allocated Use: RADIOLOCATION
Remarks: The band 9975-10025 MHz is also allocated to the meteorological-satellite service on a secondary basis for use by weather radars.

The following graph shows the number of times a particular frequency exceeded the average power in the previous 150 sweeps by 5 db or more. The data table that follows it is indexed by frequency and shows the time of occurrence of each hit.






X BAND MONITORING AT 40' RFI MONITORING STATION

8.5 TO 10.0 GHz, 100 KHz RBW, 374793 Sweeps




15:48:20 EST, 18 November 2005 to 10:14:22 EST, 21 November 2005

3-12 GHz Spiral Antenna, 8-12 GHz Amplifier, Agilent E-4407B Spectrum Analyzer













Frequency (MHz)

Amplitude (dB)

Date

Time (EST)

9336.25

-54.63

11/19/2005

20:07:08.670

9340.00

-54.90

11/20/2005

14:50:34.448

9343.75

-46.38

11/20/2005

21:08:16.559

9343.75

-54.33

11/20/2005

21:08:20.555

9347.50

-50.63

11/19/2005

16:05:03.199

9347.50

-54.38

11/19/2005

19:41:11.746

9347.50

-54.72

11/20/2005

22:29:34.273

9351.25

-53.26

11/21/2005

08:37:30.926

9355.00

-52.78

11/18/2005

16:12:53.361

9366.25

-42.34

11/20/2005

19:28:24.249

9366.25

-51.38

11/21/2005

08:44:45.144

9366.25

-54.08

11/21/2005

08:44:46.476

9370.00

-49.48

11/19/2005

10:26:24.572

9370.00

-52.81

11/20/2005

19:19:58.717

9370.00

-53.15

11/21/2005

07:13:24.679

9370.00

-53.96

11/21/2005

08:36:45.159

9373.75

-52.82

11/18/2005

17:47:26.370

9373.75

-44.37

11/18/2005

17:47:45.656

9373.75

-51.19

11/18/2005

17:47:50.955

9373.75

-51.33

11/18/2005

17:48:04.320

9373.75

-51.68

11/18/2005

17:48:09.630

9373.75

-48.86

11/18/2005

17:48:18.957

9373.75

-51.56

11/18/2005

20:07:05.900

9373.75

-48.42

11/19/2005

01:49:39.599

9373.75

-51.59

11/19/2005

08:16:41.410

9373.75

-51.58

11/19/2005

08:20:04.456

9373.75

-54.87

11/19/2005

10:19:49.868

9373.75

-54.88

11/19/2005

10:20:46.496

9373.75

-49.57

11/19/2005

10:24:49.444

9373.75

-49.53

11/19/2005

10:28:12.260

9373.75

-54.21

11/19/2005

10:28:24.890

9373.75

-51.75

11/19/2005

10:29:28.349

9373.75

-54.70

11/19/2005

10:29:32.996

9373.75

-53.41

11/19/2005

10:29:49.572

9373.75

-54.53

11/19/2005

16:31:51.949

9373.75

-49.07

11/19/2005

16:32:52.352

9373.75

-52.58

11/19/2005

16:34:12.655

9373.75

-32.33

11/19/2005

16:34:23.933

9373.75

-46.80

11/19/2005

22:59:52.679

9373.75

-50.28

11/20/2005

08:23:41.646

9373.75

-39.23

11/20/2005

08:34:49.423

9373.75

-52.14

11/20/2005

08:38:31.398

9373.75

-53.44

11/20/2005

08:39:33.151

9373.75

-54.16

11/20/2005

08:40:00.422

9373.75

-46.56

11/20/2005

08:40:19.060

9373.75

-51.45

11/20/2005

08:40:40.452

9373.75

-52.26

11/20/2005

08:41:16.406

9373.75

-54.38

11/20/2005

08:41:56.297

9373.75

-54.15

11/20/2005

08:42:28.235

9373.75

-54.45

11/20/2005

08:42:33.543

9373.75

-46.08

11/20/2005

10:20:06.918

9373.75

-52.22

11/20/2005

10:22:55.632

9373.75

-53.23

11/20/2005

13:07:31.616

9373.75

-45.10

11/20/2005

16:42:09.770

9373.75

-45.88

11/21/2005

10:00:54.731

9373.75

-53.06

11/21/2005

10:03:26.754

9377.50

-51.14

11/19/2005

18:06:52.034

9377.50

-54.99

11/20/2005

19:47:53.758

9377.50

-54.95

11/21/2005

08:14:26.785

9381.25

-53.60

11/20/2005

12:38:01.177

9381.25

-54.02

11/20/2005

12:57:30.911

9385.00

-53.59

11/19/2005

11:06:16.528

9396.25

-51.78

11/19/2005

10:03:07.596

9400.00

-52.49

11/19/2005

10:00:40.547

9400.00

-51.34

11/19/2005

10:03:46.848

9625.00

-51.20

11/20/2005

16:37:18.581

9625.00

-45.24

11/20/2005

16:37:41.776

9625.00

-46.05

11/20/2005

16:37:51.080

9636.25

-49.61

11/19/2005

13:00:24.263
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