Goto Section: 101.143 | 101.147 | Table of Contents
FCC 101.145
Revised as of October 1, 2008
Goto Year:2007 |
2009
Sec. 101.145 Interference to geostationary-satellites.
These limitations are necessary to minimize the probability of harmful
interference to reception in the bands 2655–2690 MHz, 5925–7075 MHz, and
12.7–13.25 GHz on board geostationary-space stations in the fixed-satellite
service.
(a) Stations authorized prior to July 1, 1976 in the band 2655–2690 MHz,
which exceed the power levels in paragraphs (b) and (c) of this section are
permitted to operate indefinitely, provided that the operation of such
stations does not result in harmful interference to reception in these bands
on board geostationary space stations.
(b) 2655 to 2690 MHz and 5925 to 7075 MHz. No directional transmitting
antenna utilized by a fixed station operating in these bands (may be aimed
within 2 degrees of the geostationary-satellite orbit, taking into account
atmospheric refraction. However, exception may be made in unusual
circumstances upon a showing that there is no reasonable alternative to the
transmission path proposed. If there is no evidence that such exception
would cause possible harmful interference to an authorized satellite system,
said transmission path may be authorized on waiver basis where the maximum
value of the equivalent isotropically radiated power (EIRP) does not exceed:
(1) +47 dBW for any antenna beam directed within 0.5 degrees of the
stationary satellite orbit; or
(2) +47 to +55 dBW, on a linear decibel scale (8 dB per degree) for any
antenna beam directed between 0.5 degrees and 1.5 degrees of the stationary
orbit.
(c) 12.7 to 13.25 GHz. No directional transmitting antenna utilized by a
fixed station operating in this band may be aimed within 1.5 degrees of the
geostationary-satellite orbit, taking into account atmospheric refraction.
However, exception may be made in unusual circumstances upon a showing that
there is no reasonable alternative to the transmission path proposed. If
there is no evidence that such exception would cause possible harmful
interference to an authorized satellite system, said transmission path may
be authorized on waiver basis where the maximum value of the equivalent
isotropically radiated power (EIRP) does not exceed +45 dBW for any antenna
beam directed within 1.5 degrees of the stationary satellite orbit.
(d) Methods for calculating the azimuths to be avoided may be found in: CCIR
Report No. 393 (Green Books), New Delhi, 1970; in “Radio-Relay Antenna
Pointing for controlled Interference With Geostationary-Satellites” by C. W.
Lundgren and A. S. May, Bell System Technical Journal, Vol. 48, No. 10, pp.
3387–3422, December 1969; and in “Geostationary Orbit Avoidance Computer
Program” by Richard G. Gould, Common Carrier Bureau Report CC–7201, FCC,
Washington, DC, 1972. This latter report is available through the National
Technical Information Service, U.S. Department of Commerce, Springfield, VA
22151, in printed form (PB–211 500) or source card deck (PB–211 501).
[ 61 FR 26677 , May 28, 1996, as amended at 65 FR 38330 , June 20, 2000; 68 FR 12777 , Mar. 17, 2003]
Goto Section: 101.143 | 101.147
Goto Year: 2007 |
2009
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