Allocations

 
U.S. Non-Federal-Government Allocations
1525 - 1535 MHz
MOBILE-SATELLITE (space-to-Earth) US315 US380


U.S. Federal Government Allocations
1525 - 1535 MHz
MOBILE-SATELLITE (space-to-Earth) US315 US380


ITU Region 1 Allocations
1530 - 1535 MHz
SPACE OPERATION (space-to-Earth)
MOBILE-SATELLITE (space-to-Earth) 5.208B 5.351A 5.353A
Earth exploration-satellite
Fixed
Mobile except aeronautical mobile


ITU Region 2 Allocations
1530 - 1535 MHz
SPACE OPERATION (space-to-Earth)
MOBILE-SATELLITE (space-to-Earth) 5.208B 5.351A 5.353A
Earth exploration-satellite
Fixed
Mobile 5.343


ITU Region 3 Allocations
1530 - 1535 MHz
SPACE OPERATION (space-to-Earth)
MOBILE-SATELLITE (space-to-Earth) 5.208B 5.351A 5.353A
Earth exploration-satellite
Fixed
Mobile 5.343


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Footnotes


5.208B In the bands:

137-138 MHz,
387-390 MHz,
400.15-401 MHz,
1452-1492 MHz,
1525-1610 MHz,
1613.8-1626.5 MHz,
2655-2690 MHz,
21.4-22 GHz,

Resolution 739 (Rev.WRC-07) applies. (WRC-07)(FCC)

5.341 In the bands 1400-1727 MHz, 101-120 GHz and 197-220 GHz, passive research is being conducted by some countries in a programme for the search for intentional emissions of extraterrestrial origin.

5.342 Additional allocation: in Armenia, Azerbaijan, Belarus, Bulgaria, the Russian Federation, Uzbekistan, Kyrgystan and Ukraine, the band 1429-1535 MHz is also allocated to the aeronautical mobile service on a primary basis exclusively for the purposes of aeronautical telemetry within the national territory. As of 1 April 2007, the use of the band 1452-1492 MHz is subject to agreement between the administrations concerned.

5.343 In Region 2, the use of the band 1435-1535 MHz by the aeronautical mobile service for telemetry has priority over other uses by the mobile service.

5.351 The bands 1525-1544 MHz, 1545-1559 MHz, 1626.5-1645.5 MHz and 1646.5-1660.5 MHz shall not be used for feeder links of any service. In exceptional circumstances, however, an earth station at a specified fixed point in any of the mobile-satellite services may be authorized by an administration to communicate via space stations using these bands.

5.351A For the use of the bands 1518-1544 MHz, 1545-1559 MHz, 1610-1645.5 MHz, 1646.5 1660.5 MHz, 1668-1675 MHz, 1980-2010 MHz, 2170-2200 MHz, 2483.5-2520 MHz and 2670 2690 MHz by the mobile-satellite service, see Resolutions 212 (Rev.WRC-07) and 225 (Rev.WRC 07). (WRC-07)

5.353A In applying the procedures of Section II of Article 9 to the mobile-satellite service in the bands 1530-1544 MHz and 1626.5-1645.5 MHz, priority shall be given to accommodating the spectrum requirements for distress, urgency and safety communications of the Global Maritime Distress and Safety System (GMDSS). Maritime mobile-satellite distress, urgency and safety communications shall have priority access and immediate availability over all other mobile satellite communications operating within a network. Mobile-satellite systems shall not cause unacceptable interference to, or claim protection from, distress, urgency and safety communications of the GMDSS. Account shall be taken of the priority of safety-related communications in the other mobile-satellite services. (The provisions of Resolution 222 (Rev.WRC-07) shall apply.) (FCC)

5.354 The use of the bands 1525-1559 MHz and 1626.5-1660.5 MHz by the mobile-satellite services is subject to coordination under No. 9.11A.

US315 In the bands 1530-1544 MHz and 1626.5-1645.5 MHz, maritime mobile-satellite distress and safety communications, e.g., GMDSS, shall have priority access with real-time preemptive capability in the mobile-satellite service. Communications of mobile-satellite system stations not participating in the GMDSS shall operate on a secondary basis to distress and safety communications of stations operating in the GMDSS. Account shall be taken of the priority of safety-related communications in the mobile-satellite service.

US380 In the bands 1525-1544 MHz, 1545-1559 MHz, 1610-1645.5 MHz, 1646.5-1660.5 MHz, and 2483.5-2500 MHz, a non-Federal licensee in the mobile-satellite service (MSS) may also operate an ancillary terrestrial component in conjunction with its MSS network, subject to the Commission’s rules for ancillary terrestrial components and subject to all applicable conditions and provisions of its MSS authorization.


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Inmarsat
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Occupancy Measurements (10)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 1525 MHz 1530 MHz 1535 MHz
Wavelength 19.7 cm 19.6 cm 19.5 cm
Band designator(s) UHF; L-band (IEEE) UHF; L-band (IEEE) UHF; L-band (IEEE)
Isotropic collecting area 30.8 cm2 30.6 cm2 30.4 cm2
Free space loss (1 m) 36.1 dB 36.1 dB 36.2 dB
Free space loss (1 km) 96.1 dB 96.1 dB 96.2 dB
Free space loss (10 km) 116.1 dB 116.1 dB 116.2 dB
Free space loss (100 km) 136.1 dB 136.1 dB 136.2 dB
Free space loss (1000 km) 156.1 dB 156.1 dB 156.2 dB
Free space loss
(35,786 km = GEO orbit)
187.2 dB 187.2 dB 187.2 dB
Free space loss (378,370 km = Moon) 207.7 dB 207.7 dB 207.7 dB