47 C.F.R. Subpart Q—Stations in the Radiodetermination Service
Title 47 - Telecommunication
Stations in the aeronautical radiodetermination service provide radionavigation and radiolocation services. (a) Transmission by radionavigation land stations must be limited to aeronautical navigation, including obstruction warning. (b) Radionavigation land test stations are used for the testing and calibration of aircraft navigational aids and associated equipment. When used as radionavigation land test stations (MTF) signal generators must be licensed as radionavigation land test stations (MTF). Transmission must be limited to cases when radiation is necessary and there is no alternative. (c) Transmissions by emergency locator transmitter (ELT) test stations must be limited to necessary testing of ELTs and to training operations related to the use of such transmitters. [53 FR 28940, Aug. 1, 1988, as amended at 58 FR 67696, Dec. 22, 1993] (a) Licenses for radionavigation land test stations (MTF) will be granted only to applicants engaged in the development, manufacture or maintenance of aircraft radionavigation equipment. Licenses for radionavigation land test stations (OTF) will be granted only to applicants who agree to establish the facility at an airport for the use of the public. (b) Licenses for ELT test stations will be granted only to applicants to train personnel in the operation and location of ELTs, or for testing related to the manufacture or design of ELTs. [53 FR 28940, Aug. 1, 1988, as amended at 63 FR 68958, Dec. 14, 1998] (a) Frequency coordination. The Commission will assign frequencies to radionavigation land stations and radionavigation land test stations after coordination with the FAA. The applicant must notify the appropriate Regional Office of the FAA prior to submission to the Commission of an application for a new station or for modification of an existing station to change frequency, power, location or emission. Each application must include the FAA Regional Office notified and date of notification. (b) Frequencies available for radionavigation land stations. (1) LORAN-C is a long range navigation system which operates in the 90–110 kHz band. (2) Radiobeacon stations enable an aircraft station to determine bearing or direction in relation to the radiobeacon station. Radiobeacons operate in the bands 190–285 kHz; 325–435 kHz; 510–525 kHz; and 525–535 kHz. Radiobeacons may be authorized, primarily for off-shore use, in the band 525–535 kHz on a non-interference basis to travelers information stations. (3) Aeronautical marker beacon stations radiate a vertical distinctive pattern on 75 MHz which provides position information to aircraft. (4) The following table lists the specific frequencies in the 108.100–111.950 MHz band which are assignable to localizer stations with simultaneous radiotelephone channels and their associated glide path station frequency from the 328.600–335.400 MHz band. (5) VHF omni-range (VOR) stations are to be assigned frequencies in the 112.050–117.950 MHz band (50 kHz channel spacing) and the following frequencies in the 108–112 MHz band: (6) The band 960–1215 MHz is available for the use of land stations and associated airborne electronic aids to air navigation. When distance measuring equipment (DME) is intended to operate with a single VHF navigation station in the 108–117.975 MHz band, the DME operating channel must be paired with the VHF channel as shown in the following table: (7) 1300–1350 MHz: The use of this band is restricted to surveillance radar stations and associated airborne transponders. (8) 1559–1626.5 MHz: The use of this band is limited to airborne electronic aids to air navigation and any associated land stations. (c) Frequencies available for radionavigation land test stations. (1) The frequencies set forth in §87.187(c), (e) through (j), (r), and (t) and §87.475(b) (6) through (10), and (12) may be assigned to radionavigation land test stations for the testing of aircraft transmitting equipment that normally operate on these frequencies and for the testing of land-based receiving equipment that operate with airborne radionavigation equipment. (2) The frequencies available for assignment to radionavigation land test stations for the testing of airborne receiving equipment are 108.000 and 108.050 MHz for VHF omni-range; 108.100 and 108.150 MHz for localizer; 334.550 and 334.700 MHz for glide slope; 978 and 979 MHz (X channel)/1104 MHz (Y channel) for DME; 1030 MHz for air traffic control radar beacon transponders; 1090 MHz for Traffic Alert and Collision Avoidance Systems (TCAS); and 5031.0 MHz for microwave landing systems. Additionally, the frequencies in paragraph (b) of this section may be assigned to radionavigation land test stations after coordination with the FAA. The following conditions apply: (i) The maximum power authorized on the frequencies 108.150 and 334.550 MHz is 1 milliwatt. The maximum power authorized on all other frequencies is one watt. (ii) The pulse repetition rate (PRR) of the 1030 MHz ATC radar beacon test set will be 235 pulses per second (pps) ±5pps. (iii) The assignment of 108.000 MHz is subject to the condition that no interference will be caused to the reception of FM broadcasting stations and stations using the frequency are not protected against interference from FM broadcasting stations. (d) Frequencies available for ELT test stations. The frequencies available for assignment to ELT test stations are 121.600, 121.650, 121.700, 121.750, 121.800, 121.850, and 121.900 MHz. Licensees must: (1) Not cause harmful interference to voice communications on these frequencies or any harmonically related frequency. (2) Coordinate with the appropriate FAA Regional Spectrum Management Office prior to each activation of the transmitter. (e) Frequencies available for differential GPS stations. Frequencies in the 112–118 MHz band may be assigned to Special Category I (SCAT-I) ground stations for differential GPS data links. (1) The frequencies available are on 25 kHz centers with the lowest assignable frequency being centered at 112.000 MHz and the highest assignable frequency being centered at 117.950 MHz. (2) Applicants must coordinate a frequency, time slot assignment, and three-letter identifier with the FAA and provide this information to the Commission upon application. [53 FR 28940, Aug. 1, 1988, as amended at 54 FR 11721, Mar. 22, 1989; 63 FR 68958, Dec. 14, 1998; 64 FR 27476, May 20, 1999; 69 FR 32886, June 14, 2004] Radionavigation land stations may be designated by the FAA as part of the National Airspace System. Stations so designated will be required to serve the public under IFT conditions. This condition of grant is applicable to all radionavigation land stations. (a) Military or other Government stations have been authorized to establish wide-band systems using frequency-hopping spread spectrum techniques in the 960–1215 MHz band. Authorization for a Joint Tactical Information Distribution Systems (JTIDS) has been permitted on the basis of non-interference to the established aeronautical radionavigation service in this band. In order to accommodate the requirements for the system within the band, restrictions are imposed. Transmissions will be automatically prevented if: (1) The frequency-hopping mode fails to distribute the JTIDS spectrum uniformly across the band; (2) The radiated pulse varies from the specified width of 6.4 microseconds ±5%; (3) The energy radiated within ±7 MHz of 1030 and 1090 MHz exceeds a level of 60 dB below the peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited from transmitting if the time slot duty factor exceeds a 20 percent duty factor for any single user and a 40 percent composite duty factor for all JTIDS emitters in a geographic area. (b) If radionavigation systems operating in the 960–1215 MHz band experience interference or unexplained loss of equipment performance, the situation must be reported immediately to the nearest office of the FAA, the National Telecommunications and Information Administration, Washington, DC 20504, or the nearest Federal Communications Commission field office. The following information must be provided to the extent available: (1) Name, call sign and category of station experiencing the interference; (2) Date and time of occurrence; (3) Geographical location at time of occurrence; (4) Frequency interfered with; (5) Nature of interference; and (6) Other particulars. (a) Radiobeacons may be licensed for unattended operation. An applicant must comply with the following: (1) The transmitter is crystal controlled and specifically designed for radiobeacon service and capable of transmitting by self-actuating means; (2) The emissions of the transmitter must be continuously monitored by a licensed operator, or by a direct positive automatic monitor, supplemented by aural monitoring at suitable intervals; (3) If as a result of aural monitoring it is determined that a deviation from the terms of the station license has occurred, the transmitters must be disabled immediately by a properly authorized person. If automatic monitoring is used, the monitor must insure that the operation of the transmitter meets the license terms or is disabled; (4) A properly authorized person must be able to reach the transmitter and disable it in a reasonable amount of time, so as not to adversely affect life or property in the air; (5) The equipment must be inspected at least every 180 days. Results of inspections must be kept in the station maintenance records; (6) The transmitter is not operable by or accessible to, other than authorized persons; (7) The transmitter is in a remote location. (b) Authority for unattended operation must be expressly stated in the station license. [53 FR 28940, Aug. 1, 1988, as amended at 63 FR 68958, Dec. 14, 1998]
Title 47: Telecommunication
PART 87—AVIATION SERVICES
Subpart Q—Stations in the Radiodetermination Service
§ 87.471 Scope of service.
§ 87.473 Supplemental eligibility.
§ 87.475 Frequencies.
------------------------------------------------------------------------ Localizer (MHz) Glide path (MHz)------------------------------------------------------------------------ 108.100 334.700 108.150 334.550 108.300 334.100 108.350 333.950 108.500 329.900 108.550 329.750 108.700 330.500 108.750 330.350 108.900 329.300 108.950 329.150 109.100 331.400 109.150 331.250 109.300 332.000 109.350 331.850 109.500 332.600 109.550 332.450 109.700 333.200 109.750 333.050 109.900 333.800 109.950 333.650 110.100 334.400 110.150 334.250 110.300 335.000 110.350 334.850 110.500 329.600 110.550 329.450 110.700 330.200 110.750 330.050 110.900 330.800 110.950 330.650 111.100 331.700 111.150 331.550 111.300 332.300 111.350 332.150 111.500 332.900 111.550 332.750 111.700 333.500 111.750 333.350 111.900 331.100 111.950 330.950------------------------------------------------------------------------
108.250
108.400
108.450
108.600
108.650
108.800
108.850
109.000
109.050
109.200
109.250
109.400
109.450
109.600
109.650
109.800
109.850
110.000
110.050
110.200
110.250
110.400
110.450
110.600
110.650
110.800
110.850
111.000
111.050
111.200
111.250
111.400
111.450
111.600
111.650
111.800
111.850
112.000 DME Channeling and Pairing [MHz]------------------------------------------------------------------------ Airborne interrogating VHF channel frequency Ground reply frequency------------------------------------------------------------------------ 108.000 1041.000 978.000 108.050 1041.000 1104.000 108.100 1042.000 979.000 108.150 1042.000 1105.000 108.200 1043.000 980.000 108.250 1043.000 1106.000 108.300 1044.000 981.000 108.350 1044.000 1107.000 108.400 1045.000 982.000 108.450 1045.000 1108.000 108.500 1046.000 983.000 108.550 1046.000 1109.000 108.600 1047.000 984.000 108.650 1047.000 1110.000 108.700 1048.000 985.000 108.750 1048.000 1111.000 108.800 1049.000 986.000 108.850 1049.000 1112.000 108.900 1050.000 987.000 108.950 1050.000 1113.000 109.000 1051.000 988.000 109.050 1051.000 1114.000 109.100 1052.000 989.000 109.150 1052.000 1115.000 109.200 1053.000 990.000 109.250 1053.000 1116.000 109.300 1054.000 991.000 109.350 1054.000 1117.000 109.400 1055.000 992.000 109.450 1055.000 1118.000 109.500 1056.000 993.000 109.550 1056.000 1119.000 109.600 1057.000 994.000 109.650 1057.000 1120.000 109.700 1058.000 995.000 109.750 1058.000 1121.000 109.800 1059.000 996.000 109.850 1059.000 1122.000 109.900 1060.000 997.000 109.950 1060.000 1123.000 110.000 1061.000 998.000 110.050 1061.000 1124.000 110.100 1062.000 999.000 110.150 1062.000 1125.000 110.200 1063.000 1000.000 110.250 1063.000 1126.000 110.300 1064.000 1001.000 110.350 1064.000 1127.000 110.400 1065.000 1002.000 110.450 1065.000 1128.000 110.500 1066.000 1003.000 110.550 1066.000 1129.000 110.600 1067.000 1004.000 110.650 1067.000 1130.000 110.700 1068.000 1005.000 110.750 1068.000 1131.000 110.800 1069.000 1006.000 110.850 1069.000 1132.000 110.900 1070.000 1007.000 110.950 1070.000 1133.000 111.000 1071.000 1008.000 111.050 1071.000 1134.000 111.100 1072.000 1009.000 111.150 1072.000 1135.000 111.200 1073.000 1010.000 111.250 1073.000 1136.000 111.300 1074.000 1011.000 111.350 1074.000 1137.000 111.400 1075.000 1012.000 111.450 1075.000 1138.000 111.500 1076.000 1013.000 111.550 1076.000 1139.000 111.600 1077.000 1014.000 111.650 1077.000 1140.000 111.700 1078.000 1015.000 111.750 1078.000 1141.000 111.800 1079.000 1016.000 111.850 1079.000 1142.000 111.900 1080.000 1017.000 111.950 1080.000 1143.000 112.000 1081.000 1018.000 112.050 1081.000 1144.000 112.100 1082.000 1019.000 112.150 1082.000 1145.000 112.200 1083.000 1020.000 112.250 1083.000 1146.000 112.300 1094.000 1157.000 112.350 1094.000 1031.000 112.400 1095.000 1158.000 112.450 1095.000 1032.000 112.500 1096.000 1159.000 112.550 1096.000 1033.000 112.600 1097.000 1160.000 112.650 1097.000 1034.000 112.700 1098.000 1161.000 112.750 1098.000 1035.000 112.800 1099.000 1162.000 112.850 1099.000 1036.000 112.900 1100.000 1163.000 112.950 1100.000 1037.000 113.000 1101.000 1164.000 113.050 1101.000 1038.000 113.100 1102.000 1165.000 113.150 1102.000 1039.000 113.200 1103.000 1166.000 113.250 1103.000 1040.000 113.300 1104.000 1167.000 113.350 1104.000 1041.000 113.400 1105.000 1168.000 113.450 1105.000 1042.000 113.500 1106.000 1169.000 113.550 1106.000 1043.000 113.600 1107.000 1170.000 113.650 1107.000 1044.000 113.700 1108.000 1171.000 113.750 1108.000 1045.000 113.800 1109.000 1172.000 113.850 1109.000 1046.000 113.900 1110.000 1173.000 113.950 1110.000 1047.000 114.000 1111.000 1174.000 114.050 1111.000 1048.000 114.100 1112.000 1175.000 114.150 1112.000 1049.000 114.200 1113.000 1176.000 114.250 1113.000 1050.000 114.300 1114.000 1177.000 114.350 1114.000 1051.000 114.400 1115.000 1178.000 114.450 1115.000 1052.000 114.500 1116.000 1179.000 114.550 1116.000 1053.000 114.600 1117.000 1180.000 114.650 1117.000 1054.000 114.700 1118.000 1181.000 114.750 1118.000 1055.000 114.800 1119.000 1182.000 114.850 1119.000 1056.000 114.900 1120.000 1183.000 114.950 1120.000 1057.000 115.000 1121.000 1184.000 115.050 1121.000 1058.000 115.100 1122.000 1185.000 115.150 1122.000 1059.000 115.200 1123.000 1186.000 115.250 1123.000 1060.000 115.300 1124.000 1187.000 115.350 1124.000 1061.000 115.400 1125.000 1188.000 115.450 1125.000 1062.000 115.500 1126.000 1189.000 115.550 1126.000 1063.000 115.600 1127.000 1190.000 115.650 1127.000 1064.000 115.700 1128.000 1191.000 115.750 1128.000 1065.000 115.800 1129.000 1192.000 115.850 1129.000 1066.000 115.900 1130.000 1193.000 115.950 1130.000 1067.000 116.000 1131.000 1194.000 116.050 1131.000 1068.000 116.100 1132.000 1195.000 116.150 1132.000 1069.000 116.200 1133.000 1196.000 116.250 1133.000 1070.000 116.300 1134.000 1197.000 116.350 1134.000 1071.000 116.400 1135.000 1198.000 116.450 1135.000 1072.000 116.500 1136.000 1199.000 116.550 1136.000 1073.000 116.600 1137.000 1200.000 116.650 1137.000 1074.000 116.700 1138.000 1201.000 116.750 1138.000 1075.000 116.800 1139.000 1202.000 116.850 1139.000 1076.000 116.900 1140.000 1203.000 116.950 1140.000 1077.000 117.000 1141.000 1204.000 117.050 1141.000 1078.000 117.100 1142.000 1205.000 117.150 1142.000 1079.000 117.200 1143.000 1206.000 117.250 1143.000 1080.000 117.300 1144.000 1207.000 117.350 1144.000 1081.000 117.400 1145.000 1208.000 117.450 1145.000 1082.000 117.500 1146.000 1209.000 117.550 1146.000 1083.000 117.600 1147.000 1210.000 117.650 1147.000 1084.000 117.700 1148.000 1211.000 117.750 1148.000 1085.000 117.800 1149.000 1212.000 117.850 1149.000 1086.000 117.900 1150.000 1213.000 117.950 1150.000 1087.000------------------------------------------------------------------------
§ 87.477 Condition of grant for radionavigation land stations.
§ 87.479 Harmful interference to radionavigation land stations.
§ 87.481 Unattended operation of domestic radiobeacon stations.
