SpectrumWiki

Radio spectrum allocations

Look up a frequency or a range.

Examples: 88.5 MHz, 1350–1430 MHz, 2.4 GHz

9.8 GHz (9,800,000,000 Hz)

U.S. Non-Federal-Government Allocations

9.5 – 9.9 GHz

Earth exploration-satellite (active)

Radiolocation

Space research (active)

FCC rule parts

Private Land Mobile (90)

U.S. Federal Government Allocations

9.8 – 9.9 GHz

RADIOLOCATION

Earth exploration-satellite (active)

Space research (active)

ITU Region 1 Allocations

9.8 – 9.9 GHz

RADIOLOCATION

Earth exploration-satellite (active)

Fixed

Space research

5.477 5.478 5.478A 5.478B

ITU Region 2 Allocations

9.8 – 9.9 GHz

RADIOLOCATION

Earth exploration-satellite (active)

Fixed

Space research

5.477 5.478 5.478A 5.478B

ITU Region 3 Allocations

9.8 – 9.9 GHz

RADIOLOCATION

Earth exploration-satellite (active)

Fixed

Space research

5.477 5.478 5.478A 5.478B

Footnotes

5.477 Different category of service: in Algeria, Saudi Arabia, Bahrain, Bangladesh, Brunei Darussalam, Cameroon, Djibouti, Egypt, the United Arab Emirates, Eritrea, Ethiopia, Guyana, India, Indonesia, Iran (Islamic Republic of), Iraq, Jamaica, Japan, Jordan, Kuwait, Lebanon, Liberia, Malaysia, Nigeria, Oman, Uganda, Pakistan, Qatar, Syrian Arab Republic, the Dem. People’s Rep. of Korea, Singapore, Somalia, Sudan, South Sudan, Trinidad and Tobago, and Yemen, the allocation of the frequency band 9 800-10 000 MHz to the fixed service is on a primary basis (see No. 5.33). (WRC 15)
5.478 Additional allocation: in Azerbaijan, Kyrgyzstan, Romania, Turkmenistan and Ukraine, the frequency band 9 800-10 000 MHz is also allocated to the radionavigation service on a primary basis. (WRC-19)
5.478A The use of the band 9 800-9 900 MHz by the Earth exploration-satellite service (active) and the space research service (active) is limited to systems requiring necessary bandwidth greater than 500 MHz that cannot be fully accommodated within the 9 300-9 800 MHz band. (WRC 07)
5.478B In the band 9 800-9 900 MHz, stations in the Earth exploration-satellite service (active) and space research service (active) shall not cause harmful interference to, nor claim protection from stations of the fixed service to which this band is allocated on a secondary basis. (WRC 07)

Wiki entries

AN/APS-137(V) Search Radar

Current Use 9.3–10.1 GHz AN/APS-137(V) search radar

According to Forecast International, "the APS-137(V) was designed as a search radar to detect and track surface vessels, submarine periscopes, and snorkels in high sea states." The radar was used in the Navy's P3 Orion surveillance aircraft for various purposes, including submarine hunting. The P3 is replaced by the P8 Poseidon aircraft, which uses a newer radar, designated AN/APY-10. The newer radar may use the same frequency range as the legacy APS-137(V), but that is not confirmed.

Please refer to the linked document from Forecast International for detailed technical information on the APS-137(V).