Goto Section: 25.165 | 25.202 | Table of Contents
FCC 25.201
Revised as of October 1, 2011
Goto Year:2010 |
2012
§ 25.201 Definitions.
Definitions for terms in subpart C of this part appear in this section,
and in § 2.1 of this chapter.
1.6/2.4 GHz Mobile-Satellite Service. A mobile-satellite service that
operates in the 1610-1626.5 MHz and 2483.5-2500 MHz frequency bands, or
in any portion thereof.
2 GHz Mobile Satellite Service. A mobile-satellite service that
operated in the 2000-2020 MHz and 2180-2200 MHz frequency bands, or in
any portion thereof.
17/24 GHz Broadcasting-Satellite Service. A radiocommunications service
using geostationary satellites between one or more feeder link earth
stations and other earth stations, in the 17.3--17.7 GHz
(space-to-Earth) (domestic allocation), 17.3--17.8 GHz (international
allocation) and 24.75--25.25 GHz frequency bands. This service is also
known as "17/24 GHz BSS." For purposes of the application processing
provisions of this part, 17/24 GHz BSS is a GSO-like service. For
purposes of the technical requirements of this part, we will treat
17/24 GHz BSS as if it were FSS. Unless specifically stated otherwise,
the 17/24 GHz BSS systems are subject to the rules in this part
applicable to FSS.
Active satellite. An earth satellite carrying a station intended to
transmit or re-transmit radiocommunication signals.
Ambulatory. Not stationary. Baselines from which maritime boundaries
are measured change with accretion- and erosion-caused ambulation of
the boundaries themselves.
Ancillary terrestrial component. The term "ancillary terrestrial
component" means a terrestrial communications network used in
conjunction with a qualifying satellite network system authorized
pursuant to these rules and the conditions established in the Orders
issued in IB Docket No. 01-185, Flexibility for Delivery of
Communications by Mobile Satellite Service Providers in the 2 GHz Band,
the L-Band, and the 1.6/2.4 GHz Band.
Ancillary terrestrial component base station. The term "ancillary
terrestrial component base station" means a terrestrial fixed facility
used to transmit communications to or receive communications from one
or more ancillary terrestrial component mobile terminals.
Ancillary terrestrial component mobile terminal. The term "ancillary
terrestrial component mobile terminal" means a terrestrial mobile
facility used to transmit communications to or receive communications
from an ancillary terrestrial component base station or a space
station.
Base Earth Station. An earth station in the fixed-satellite service or,
in some cases, in the land mobile-satellite service, located at a
specified fixed point or within a specified area on land to provide a
feeder link for the land mobile-satellite service. (RR)
Baseline. The line from which maritime zones are measured, also known
as the coast line. The baseline is a combination of the low-water line
("low-tide elevation") and closing lines across the mouths of inland
water bodies. The baseline is defined by a series of baseline points.
The baseline points are not just the low-water marks of the shore of
mainland but also includes islands and "low-water elevations" ( i.e. ,
natural rocks). Baseline points are ambulatory, and thus, require
adjustment from time-to-time by the U.S. Department of State's Baseline
Committee.
C-band. For purposes of this part, the terms "C-band" and "conventional
C-band" refer specifically to the 3700-4200 MHz downlink and 5925-6425
MHz uplink frequency bands. These paired bands are allocated to the
Fixed-Satellite Service and are also referred to as the 4/6 GHz
band(s).
Coordination distance. For the purposes of this part, the expression
"coordination distance" means the distance from an earth station,
within which there is a possibility of the use of a given transmitting
frequency at this earth station causing harmful interference to
stations in the fixed or mobile service, sharing the same band, or of
the use of a given frequency for reception at this earth station
receiving harmful interference from such stations in the fixed or
mobile service.
Direct Broadcast Satellite Service. A radiocommunication service in
which signals transmitted or retransmitted by space stations, using
frequencies specified in § 25.202(a)(7), are intended for direct
reception by the general public. For the purposes of this definition,
the term direct reception shall encompass both individual reception and
community reception.
Earth station. A station located either on the Earth's surface or
within the major portion of the Earth's atmosphere intended for
communication:
(a) With one or more space stations; or
(b) With one or more stations of the same kind by means of one or more
reflecting satellites or other objects in space.
Earth Station on Vessel ("ESV"). An ESV is an earth station onboard a
craft designed for traveling on water receiving from and transmitting
to fixed-satellite space stations.
Electronic filing. The submission of applications, exhibits, pleadings,
or other filings to the Commission in an electronic form using Internet
or World Wide Web on-line filing forms.
Equivalent diameter. When circular aperture reflector antennas are
employed, the size of the antenna is generally expressed as the
diameter of the antenna's main reflector. When non-reflector or
non-circular aperture antennas are employed, an equivalent diameter can
be computed for the antenna. The equivalent diameter is the diameter of
a hypothetical circular aperture antenna with the same aperture area as
the actual antenna. For example, an elliptical aperture antenna with
major axis, a , and minor axis, b , will have an equivalent diameter of
[ a * b ]^1/2. A rectangular aperture antenna with length, l , and
width, w , will have an equivalent diameter of [4( l * w )/p]^1/2.
Equivalent power flux-density. The equivalent power flux-density (EPFD)
is the sum of the power flux-densities produced at a geostationary
satellite orbit (GSO) receive earth or space station on the Earth's
surface or in the geostationary satellite orbit, as appropriate, by all
the transmit stations within a non-geostationary satellite orbit
fixed-satellite service (NGSO FSS) system, taking into account the
off-axis discrimination of a reference receiving antenna assumed to be
pointing in its nominal direction. The equivalent power flux-density,
in dB(W/m^2 ) in the reference bandwidth, is calculated using the
following formula:
[MATH: :MATH]
Where:
N ais the number of transmit stations in the non-geostationary
satellite orbit system that are visible from the GSO receive station
considered on the Earth's surface or in the geostationary satellite
orbit, as appropriate;
i is the index of the transmit station considered in the
non-geostationary satellite orbit system;
P iis the RF power at the input of the antenna of the transmit station,
considered in the non-geostationary satellite orbit system in dBW in
the reference bandwidth;
2iis the off-axis angle between the boresight of the transmit station
considered in the non-geostationary satellite orbit system and the
direction of the GSO receive station;
G t(2i) is the transmit antenna gain (as a ratio) of the station
considered in the non-geostationary satellite orbit system in the
direction of the GSO receive station;
d iis the distance in meters between the transmit station considered in
the non-geostationary satellite orbit system and the GSO receive
station;
Niis the off-axis angle between the boresight of the antenna of the GSO
receive station and the direction of the ith transmit station
considered in the non-geostationary satellite orbit system;
G r(Ni) is the receive antenna gain (as a ratio) of the GSO receive
station in the direction of the ith transmit station considered in the
non-geostationary satellite orbit system;
G r,[max]is the maximum gain (as a ratio) of the antenna of the GSO
receive station;
Fixed earth station. An earth station intended to be used at a
specified fixed point.
Fixed-Satellite Service. A radiocommunication service between earth
stations at given positions, when one or more satellites are used; the
given position may be a specified fixed point or any fixed point within
specified areas; in some cases this service includes
satellite-to-satellite links, which may also be operated in the
inter-satellite service; the fixed-satellite service may also include
feeder links of other space radiocommunication services. (RR)
Geostationary satellite. A geosynchronous satellite whose circular and
direct orbit lies in the plane of the Earth's equator and which thus
remains fixed relative to the Earth; by extension, a satellite which
remains approximately fixed relative to the Earth.
Inter-Satellite Service. A radiocommunication service providing links
between artificial earth satellites.
Land Earth Station. An earth station in the fixed-satellite service or,
in some cases, in the mobile-satellite service, located at a specified
fixed point or within a specified area on land to provide a feeder link
for the mobile-satellite service. (RR)
Land Mobile Earth Station. A mobile earth station in the land
mobile-satellite service capable of surface movement within the
geographical limits of a country or continent. (RR)
Ku-band. In this rule part, the terms "Ku-band" and "conventional
Ku-band" refer specifically to the 11700-12200 MHz downlink and
14000-14500 MHz uplink frequency bands. These paired bands are
allocated to the Fixed-Satellite Service and are also referred to as
the 12/14 GHz band(s).
Low-Tide Elevation. A naturally formed area of land that is surrounded
by and above water at low tide but below water at high tide. Low-tide
elevations serve as part of the coast line when they are within the
breath of the territorial sea of the mainland (either uplands or inland
waters) or an island. 1958 Convention on the Territorial Sea, Article
11.
Mobile earth station. An earth station intended to be used while in
motion or during halts at unspecified points.
Mobile-Satellite Service. A radiocommunication service:
(1) Between mobile earth stations and one or more space stations, or
between space stations used by this service; or
(2) Between mobile earth stations, by means of one or more space
stations.
This service may also include feeder links necessary for its operation.
(RR)
NGSO FSS gateway earth station. A gateway earth station is an earth
station complex consisting of multiple interconnecting earth station
antennas supporting the communication routing and switching functions
of a non-geostationary satellite orbit fixed-satellite service (NGSO
FSS) system as a whole. A gateway earth station in the NGSO FS§
(1) Does not originate or terminate radiocommunication traffic, but
interconnects multiple non-collocated user earth stations operating in
frequency bands other than designated gateway bands, through a
satellite with other primary terrestrial networks, such as the public
switched telephone network (PSTN) and/or Internet networks.
(2) Shall not be for the exclusive use of any customer.
(3) May also be used for telemetry, tracking, and command transmissions
for the same NGSO FSS system.
(4) May include multiple antennas, each required to meet the antenna
performance standard in § 25.209(h), located within an area of one
second latitude by one second longitude.
(5) Is considered as a separate gateway earth station complex if it is
out side of the area of one second latitude by one second longitude of
paragraph (4) of this definition, for the purposes of coordination with
terrestrial services.
Non-Voice, Non-Geostationary Mobile-Satellite Service. A
mobile-satellite service reserved for use by non-geostationary
satellites in the provision of non-voice communications which may
include satellite links between land earth stations at fixed locations.
Passive satellite. An earth satellite intended to transmit radio
communication signals by reflection.
Permitted Space Station List. A list of satellites operating in the
C-band and/or Ku-band including all U.S.-licensed satellites and those
non-U.S.-licensed satellites for which the Commission has authorized
routine U.S.-licensed earth stations to communicate with that
satellite, and the satellite operator has requested the Commission to
place its satellite on the Permitted Space Station List.
Power flux density. The amount of power flow through a unit area within
a unit bandwidth. The units of power flux density are those of power
spectral density per unit area, namely watts per hertz per square
meter. These units are generally expressed in decibel form as
dB(W/Hz/m^2 ), dB(W/m^2 ) in a 4 kHz band, or dB(W/m^2 ) in a 1 MHz
band.
Power spectral density. The amount of an emission's transmitted carrier
power falling within the stated reference bandwidth. The units of power
spectral density are watts per hertz and are generally expressed in
decibel form as dB(W/Hz), dB(W/4kHz), or dB(W/1MHz).
Protection areas. The geographic regions on the surface of the Earth
where United States Department of Defense ("DoD") meteorological
satellite systems or National Oceanic and Atmospheric Administration
("NOAA") meteorological satellite systems, or both such systems, are
receiving signals from low earth orbiting satellites.
Radiodetermination-Satellite Service. A radiocommunication service for
the purpose of radiodetermination involving the use of one of more
space stations. This service may also include feeder links necessary
for its own operation. (RR)
Routine processing or licensing. A licensing process whereby
applications are processed in an expedited fashion. Such applications
must be complete in all regards and consistent with all Commission
Rules and must not raise any policy issues. With respect to earth
station licensing, an application is "routine" only if it conforms to
all antenna, power, coordination, radiation hazard, and FAA
notification rules, and accesses only "Permitted Space Station List"
satellites in the conventional C-band or Ku-band frequency bands.
Satellite Digital Audio Radio Service ("DARS"). A radiocommunication
service in which audio programming is digitally transmitted by one or
more space stations directly to fixed, mobile, and/or portable
stations, and which may involve complementary repeating terrestrial
transmitters, telemetry, tracking and control facilities.
Satellite system. A space system using one or more artificial earth
satellites.
Selected assignment. The term "selected assignment" means a spectrum
assignment voluntarily identified by a 2 GHz MSS licensee at the time
that the licensee's first 2 GHz mobile-satellite service satellite
reaches its intended orbit, or other mobile-satellite service spectrum
in which the Commission permits a 2 GHz mobile-satellite service
licensee to conduct mobile-satellite service operations with authority
superior to that of other in-band, mobile-satellite service licensees.
Spacecraft. A man-made vehicle which is intended to go beyond the major
portion of the Earth's atmosphere.
Space operation service. A radiocommunication service concerned
exclusively with the operation of spacecraft, in particular space
tracking, space telemetry and space telecommand. These functions will
normally be provided within the service in which the space station is
operating.
Space radiocommunication. Any radiocommunication involving the use of
one or more space stations or the use of one or more reflecting
satellites or other objects in space.
Space station. A station located on an object which is beyond, is
intended to go beyond, or has been beyond, the major portion of the
Earth's atmosphere.
Space system. Any group of cooperating earth stations and/or space
stations employing space radiocommunication for specific purposes.
Space telecommand. The use of radiocommunication for the transmission
of signals to a space station to initiate, modify or terminate function
of the equipment on a space object, including the space station.
Space telemetering. The use of telemetering for the transmission from a
space station of results of measurements made in a spacecraft,
including those relating to the functioning of the spacecraft.
Space tracking. Determination of the orbit, velocity or instantaneous
position of an object in space by means of radiodetermination,
excluding primary radar, for the purpose of following the movement of
the object.
Structural attenuation. The term "structural attenuation" means the
signal attenuation caused by transmitting to and from mobile terminals
which are located in buildings or other man-made structures that
attenuate the transmission of radiofrequency radiation.
Terrestrial radiocommunication. Any radiocommunication other than space
radiocommunication or radio astronomy.
Terrestrial station. A station effecting terrestrial
radiocommunication.
Vehicle-mounted earth station (VMES). A VMES is an earth station,
operating from a motorized vehicle that travels primarily on land, that
receives from and transmits to geostationary satellite orbit
fixed-satellite service space stations and operates within the United
States pursuant to the requirements set out § 25.226.
[ 30 FR 7176 , May 28, 1965, as amended at 36 FR 2562 , Feb. 6, 1971; 48 FR 40254 , Sept. 6, 1983; 51 FR 18445 , May 20, 1986; 54 FR 49993 , Dec.
4, 1989; 56 FR 42706 , Aug. 29, 1991; 58 FR 68059 , Dec. 23, 1993; 59 FR 53329 , Oct. 21, 1994; 62 FR 11105 , Mar. 11, 1997; 62 FR 59296 , Nov. 3,
1997; 65 FR 59143 , Oct. 4, 2000; 66 FR 10621 , Feb. 16, 2001; 67 FR 51114 , Aug. 7, 2002; 68 FR 11993 , Mar. 13, 2003; 68 FR 33650 , June 5,
2003; 68 FR 34338 , June 9, 2003; 70 FR 4783 , Jan. 31, 2005; 70 FR 19318 , Apr. 13, 2005; 70 FR 32255 , June 2, 2005; 72 FR 50028 , Aug. 29,
2007; 74 FR 57098 , Nov. 4, 2009]
Goto Section: 25.165 | 25.202
Goto Year: 2010 |
2012
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