#### § 27.1134 Protection of Federal Government operations.

(a) *Protection of Department of Defense operations in the 1710-1755 MHz band.* The Department of Defense (DoD) operates communications systems in the 1710-1755 MHz band at 16 protected facilities, nationwide. AWS licensees must accept any interference received from these facilities and must protect the facilities from interference. AWS licensees shall protect the facilities from interference by restricting the operation of their base and fixed stations from any locations that could potentially permit AWS mobile, fixed, and portable stations transmitting in the 1710-1755 MHz band to cause interference to government operations within the radii of operation of the 16 facilities (the radii of operation of each facility is indicated in the third column of Table 1 immediately following [paragraph (a)(3)](/on/2024-09-20/title-47/section-27.1134#p-27.1134(a)(3)) of this section). In addition, AWS licensees shall be required to coordinate any operations that could permit mobile, fixed, and portable stations to operate in the specified areas of the 16 facilities, as defined in [paragraph (a)(3)](/on/2024-09-20/title-47/section-27.1134#p-27.1134(a)(3)) of this section. Protection of these facilities in this manner shall take place under the following conditions:

(1) At the Yuma, Arizona and Cherry Point, North Carolina facilities, all operations shall be protected indefinitely.

(2) At the remaining 14 facilities, airborne and military test range operations shall be protected until such time as these systems are relocated to other spectrum, and precision guided munitions (PGM) operations shall be protected until such time as these systems are relocated to other spectrum or until PGM inventory at each facility is exhausted, whichever occurs first.

(3) AWS licensees whose transmit operations in the 1710-1755 MHz band consist of fixed or mobile operations with nominal transmit EIRP values of 100 mW or less and antenna heights of 1.6 meters above ground or less shall coordinate their services around the 16 sites at the distance specified in row a. of Table 2. AWS licensees whose transmit operations in the 1710-1755 MHz band consist of fixed or mobile operations with nominal transmit EIRP values of 1 W or less and antenna heights of 10 meters above ground or less shall coordinate their services around the 16 sites at the distance specified in row b. of Table 2. These coordination distances shall be measured from the edge of the operational distances indicated in the third column of Table 1, and coordination with each affected DoD facility shall be accomplished through the Commander of the facility.

Table 1—Protected Department of Defense Facilities

| Location | Coordinates | Radius of operation (km) |
| --- | --- | --- |
| Cherry Point, NC | 34°58′ N, 076°56′ W | 100 |
| Yuma, AZ | 32°32′ N, 113°58′ W | 120 |
| China Lake, CA | 35°41′ N, 117°41′ W | 120 |
| Eglin AFB, FL | 30°29′ N, 086°31′ W | 120 |
| Pacific Missile Test Range/Point Mugu, CA | 34°07′ N, 119°30′ W | 80 |
| Nellis AFB, NV | 36°14′ N, 115°02′ W | 160 |
| Hill AFB, UT | 41°07′ N, 111°58′ W | 160 |
| Patuxent River, MD | 38°17′ N, 076°25′ W | 80 |
| White Sands Missile Range, NM | 33°00′ N, 106°30′ W | 80 |
| Fort Irwin, CA | 35°16′ N, 116°41′ W | 50 |
| Fort Rucker, AL | 31°13′ N, 085°49′ W | 50 |
| Fort Bragg, NC | 35°09′ N, 079°01′ W | 50 |
| Fort Campbell, KY | 36°41′ N, 087°28′ W | 50 |
| Fort Lewis, WA | 47°05′ N, 122°36′ W | 50 |
| Fort Benning, GA | 32°22′ N, 084°56′ W | 50 |
| Fort Stewart, GA | 31°52′ N, 081°37′ W | 50 |

Table 2—Coordination Distances for the Protected Department Of Defense Facilities

| 1710-1755 MHz transmit operations | Coordination distance (km) |
| --- | --- |
| a. EIRP ≤100 mW, antenna height ≤1.6 m AG | 35 |
| b. EIRP ≤1 W, antenna height ≤10 m AG | 55 |

(b) *Protection of non-DoD operations in the 1710-1755 MHz and 1755-1761 MHz bands.* Until such time as non-DoD systems operating in the 1710-1755 MHz and 1755-1761 MHz bands are relocated to other spectrum, AWS licensees shall protect such systems by satisfying the appropriate provisions of TIA Telecommunications Systems Bulletin 10-F, “Interference Criteria for Microwave Systems,” May, 1994 (TSB 10-F).

(c) *Protection of Federal operations in the 1675-1710 MHz band* —

(1) *27 Protection Zones.* Within 27 Protection Zones, prior to operating a base station that enables mobile or portable stations to transmit in the 1695-1710 MHz band, licensees must successfully coordinate such base station operations with Federal Government entities operating meteorological satellite Earth-station receivers in the 1675-1710 MHz band. See [47 CFR 2.106](/on/2024-09-20/title-47/section-2.106), footnote US 88, for the 27 Protection Zones and other details.

(2) *Operation outside of 27 Protection Zones.* Non-Federal operations, for mobile and portable stations operating at a maximum EIRP of 20 dBm, are permitted outside of the protection zones without coordination. All non-Federal operations for mobile and portables operating at a maximum EIRP of greater than 20 dBm and up to 30 dBm must be coordinated nationwide. All such operations may not cause harmful interference to the Federal operations protected in [47 CFR 2.106](/on/2024-09-20/title-47/section-2.106), footnote US 88.

(3) *Interference.* If protected Federal operations receive harmful interference from AWS operations in the 1695-1710 MHz band, an AWS licensee must, upon notification, modify its operations and/or technical parameters as necessary to eliminate the interference.

(4) *Point of contact.* AWS licensees in the 1695-1710 MHz band must provide and maintain a point of contact at all times so that immediate contact can be made should interference against protected Federal sites occur.

(5) *Coordination procedures.* Federal use of the radio spectrum is generally governed by the National Telecommunications and Information Administration (NTIA) while non-Federal use is governed by the Commission. As such, any guidance or details concerning Federal/non-Federal coordination must be issued jointly by NTIA and the Commission. The Commission may jointly issue with NTIA one or more public notices with guidance or details concerning the coordination procedures for the 1695-1710 MHz band.

(6) *Requirements for licensees operating in the 1710-1755 MHz band.* AWS licensees operating fixed stations in the 1710-1755 MHz band, if notified that such stations are causing interference to radiosonde receivers operating in the Meteorological Aids Service in the 1675-1700 MHz band or a meteorological-satellite earth receiver operating in the Meteorological-Satellite Service in the 1675-1710 MHz band, shall be required to modify the stations' location and/or technical parameters as necessary to eliminate the interference.

(d) *Recognition of NASA Goldstone facility operations in the 2110-2120 MHz band.* The National Aeronautics and Space Administration (NASA) operates the Deep Space Network (DSN) in the 2110-2120 MHz band at Goldstone, California (*see* Table 3). NASA will continue its operations of high power transmitters (nominal EIRP of 105.5 dBW with EIRP up to 119.5 dBW used under emergency conditions) in this band at this location. AWS licensees must accept any interference received from the Goldstone DSN facility in this band.

Table 3—Location of the NASA Goldstone Deep Space Facility

| Location | Coordinates | Maximum transmitter output power |
| --- | --- | --- |
| Goldstone, California | 35°18′ N 116°54′ W | 500 kW |

(e) *Protection of Federal operations in the 2200-2290 MHz band* —

(1) *Default emission limits.* Except as provided in [paragraph (e)(2)](/on/2024-09-20/title-47/section-27.1134#p-27.1134(e)(2)) of this section, the following default out-of-band emissions limits shall apply for AWS-4 operations in the 2180-2200 MHz band.

(i) For these AWS-4 operations, the power of any emissions on all frequencies between 2200 and 2290 MHz shall not exceed an EIRP of −100.6 dBW/4 kHz.

(ii) No AWS-4 base station operating in the 2180-2200 MHz band shall be located less than 820 meters from a U.S. Earth Station facility operating in the 2200-2290 MHz band.

(2) *Agreements between AWS-4 operators and Federal government entities.* The out-of-band emissions limits in [paragraph (e)(1)](/on/2024-09-20/title-47/section-27.1134#p-27.1134(e)(1)) of this section may be modified by the private contractual agreement of licensees of AWS-4 operating authority and Federal government entities operating in the 2200-2290 MHz band. Such agreement shall be transmitted to the Commission by the National Telecommunications and Information Administration (NTIA) of the U.S. Department of Commerce. A licensee of AWS-4 operating authority who is a party to such an agreement must maintain a copy of the agreement in its station files and disclose it, upon request, to prospective AWS-4 assignees, transferees, or spectrum lessees, to Federal operators, and to the Commission.

(f) *Protection of Federal operations in the 1755-1780 MHz band.* The Federal Government operates communications systems in the 1755-1780 MHz band. Certain systems are expected to continue to operate in the band indefinitely. All other operations will be relocating to other frequencies or otherwise cease operations in the 1755-1780 MHz band in accordance with [47 CFR part 301](/on/2024-09-20/title-47/part-301). Until such a time as Federal operations in the 1755-1780 MHz bands vacate this spectrum, AWS licensees shall protect such systems and must accept any interference received from these Federal operations. See [47 CFR 2.106](/on/2024-09-20/title-47/section-2.106), footnote US 91, for details. AWS licensees must successfully coordinate proposed operations with all Federal incumbents prior to operation as follows:

(1) *Protection Zone(s).* A protection zone is established for each Federal operation pursuant to [47 CFR 2.106](/on/2024-09-20/title-47/section-2.106), footnote US 91. Unless otherwise specified in later Commission actions, the default protection zone is nationwide. A base station which enables mobile or portable stations to transmit in the 1755-1780 MHz band may not operate within the Protection Zone(s) of a Federal operation until the licensee successfully coordinates such base station operations with Federal Government entities as follows depending on the type of Federal incumbent authorization:

(i) *Federal US&P Assignments.* Each AWS licensee must coordinate with each Federal agency that has U.S. and Possessions (US&P) authority prior to its first operations in its licensed area to reach a coordination arrangement with each US&P agency on an operator-to-operator basis. (Agencies with U.S. and Possessions (US&P) authority do not operate nationwide and may be able to share, prior to relocation, in some areas.)

(ii) *Other Federal Assignments.* Each AWS licensee must successfully coordinate all base station operations within a Protection Zone with the Federal incumbents. The default requirement is a nationwide coordination zone with possible revisions to the Protection Zone and other details to be announced in a Joint FCC/NTIA public notice.

(2) *Interference.* If protected Federal operations receive harmful interference from AWS operations in the 1755-1780 MHz band, an AWS licensee must, upon notification, modify its operations and/or technical parameters as necessary to eliminate the interference.

(3) *Point of contact.* AWS licensees in the 1755-1780 MHz band must provide and maintain a point of contact at all times so that immediate contact can be made should interference against protected Federal operations occur.

(4) *Coordination procedures.* Federal use of the radio spectrum is generally governed by the National Telecommunications and Information Administration (NTIA) while non-Federal use is governed by the Commission. As such, any guidance or details concerning Federal/non-Federal coordination must be issued jointly by NTIA and the Commission. The Commission may jointly issue with NTIA one or more public notices with guidance or details concerning the coordination procedures for the 1755-1780 MHz band.

[[69 FR 5716](https://www.federalregister.gov/citation/69-FR-5716), Feb. 6, 2004, as amended at [73 FR 50571](https://www.federalregister.gov/citation/73-FR-50571), Aug. 27, 2008; [78 FR 8270](https://www.federalregister.gov/citation/78-FR-8270), Jan. 5, 2013; [79 FR 32414](https://www.federalregister.gov/citation/79-FR-32414), June 4, 2014]