Goto Section: 25.145 | 25.147 | Table of Contents
FCC 25.146
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 25.146 Licensing and operating rules for the non-geostationary orbit
Fixed-Satellite Service in the 10.7 GHz-14.5 GHz bands.
(a) A comprehensive technical showing shall be submitted for the proposed
non-geostationary satellite orbit Fixed-Satellite Service (NGSO FSS) system
in the 10.7-14.5 GHz bands. The technical information shall demonstrate that
the proposed NGSO FSS system would not exceed the validation equivalent
power flux-density (EPFD) limits as specified in § 25.208 (g), (k), and (l)
for EPFDdown, and EPFDup. If the technical demonstration exceeds the
validation EPFD limits at any test points within the U.S. for domestic
service and at any points outside of the U.S. for international service or
at any points in the geostationary satellite orbit, as appropriate, the
application would be unacceptable for filing and will be returned to the
applicant with a brief statement identifying the non-compliance technical
demonstration. The technical showing consists of the following:
(1) Single-entry validation equivalent power flux-density, in the
space-to-Earth direction, (EPFDdown) limits. (i) Provide a set of power
flux-density (PFD) masks, on the surface of the Earth, for each space
station in the NGSO FSS system. The PFD masks shall be generated in
accordance with the specification stipulated in the most recent version of
ITU-R Recommendation S.1503, “Functional Description to be used in
Developing Software Tools for Determining Conformity of Non-GSO FSS Networks
with Limits Contained in Article 22 of the Radio Regulations.” In
particular, the PFD masks must encompass the power flux-density radiated by
the space station regardless of the satellite transmitter power resource
allocation and traffic/beam switching strategy that are used at different
periods of a NGSO FSS system's life. The PFD masks shall also be in an
electronic form that can be accessed by the computer program specified in
paragraph (a)(1)(iii) of this section.
(ii) Identify and describe in detail the assumptions and conditions used in
generating the power flux-density masks.
(iii) If a computer program that has been approved by the ITU for
determining compliance with the single-entry EPFDdown validation limits is
not yet available, the applicant shall provide a computer program for the
single-entry EPFDdown validation computation, including both the source code
and the executable file. This computer program shall be developed in
accordance with the specification stipulated in the most recent version of
Recommendation ITU-R S.1503. If the applicant uses the ITU approved
software, the applicant shall indicate the program name and the version
used.
(iv) Identify and describe in detail the necessary input parameters for the
execution of the computer program identified in paragraph (a)(1)(iii) of
this section.
(v) Provide the result, the cumulative probability distribution function of
EPFD, of the execution of the computer program described in paragraph
(a)(1)(iii) of this section by using only the input parameters contained in
paragraphs (a)(1)(i) and (a)(1)(iv) of this section.
(2) Single-entry additional operational equivalent power flux-density, in
the space-to-Earth direction, (additional operational EPFDdown) limits. (i)
Provide a set of NGSO FSS earth station maximum equivalent isotropically
radiated power (EIRP) masks as a function of the off-axis angle generated by
an NGSO FSS earth station. The maximum EIRP mask shall be generated in
accordance with the specification stipulated in the most recent version of
ITU-R Recommendation S.1503. In particular, the results of calculations
encompass what would be radiated regardless of the earth station transmitter
power resource allocation and traffic/beam switching strategy are used at
different periods of an NGSO FSS system's life. The EIRP masks shall be in
an electronic form that can be accessed by the computer program specified in
paragraph (a)(2)(iii) of this section.
(ii) Identify and describe in detail the assumptions and conditions used in
generating the maximum earth station e.i.r.p. mask.
(iii) If a computer program that has been approved by the ITU for
determining compliance with the single-entry EPFDup validation limits is not
yet available, the applicant shall provide a computer program for the
single-entry EPFDup validation computation, including both the source code
and the executable file. This computer program shall be developed in
accordance with the specification stipulated in the most recent version of
Recommendation ITU-R S.1503. If the applicant uses the ITU approved
software, the applicant shall indicate the program name and the version
used.
(iv) Identify and describe in detail the necessary input parameters for the
execution of the computer program identified in paragraph (a)(2)(iii) of
this section.
(v) Provide the result of the execution of the computer program described in
paragraph (a)(2)(iii) of this section by using only the input parameters
contained in paragraphs (a)(2)(i) and (a)(2)(iv) of this section.
(b) Ninety days prior to the initiation of service to the public, the NGSO
FSS system licensee shall submit a comprehensive technical showing for the
non-geostationary satellite orbit Fixed-Satellite Service (NGSO FSS) system
in the 10.7-14.5 GHz bands. The technical information shall demonstrate that
the NGSO FSS system is expected not to operate in excess of the additional
operational EPFDdown limits and the operational EPFDdown limits as specified
in § 25.208(i) and (j), and notes 2 and 3 to Table 1L in § 25.208(l). If the
technical demonstration exceeds the additional operational EPFDdown limits
or the operational EPFDdown limits at any test points within the United
States for domestic service and at any test points outside of the United
States for international service, the NGSO FSS system licensee shall not
initiate service to the public until the deficiency has been rectified by
reducing satellite transmission power or other adjustments. This must be
substantiated by subsequent technical showings. The technical showings
consist of the following:
(1) Single-entry additional operational equivalent power flux-density, in
the space-to-Earth direction, (additional operational EPFDdown) limits. (i)
Provide a set of anticipated operational power flux density (PFD) masks, on
the surface of the Earth, for each space station in the NGSO FSS system. The
anticipated operational PFD masks could be generated by using the method
specified in the most recent version of ITU-R Recommendation S.1503. In
particular, the anticipated operational PFD mask shall take into account the
expected maximum traffic loading distributions and geographic specific
scheduling of the actual measured space station antenna patterns (see
§ 25.210(k)). The anticipated operational PFD masks shall also be in an
electronic form that can be accessed by the computer program contained in
paragraph (b)(1)(iii) of this section.
(ii) Identify and describe in detail the assumptions and conditions used in
generating the anticipated operational power flux-density masks.
(iii) Provide a computer program for the single-entry additional operational
EPFDdown verification computation, including both the source code and the
executable file. This computer program could be developed by using the
method specified in the most recent version of ITU-R Recommendation S.1503.
(iv) Identify and describe in detail the necessary input parameters for the
execution of the additional operational EPFDdown verification computer
program identified in paragraph (b)(1)(iii) of this section.
(v) Provide the result, the cumulative probability distribution function of
EPFD, of the execution of the verification computer program described in
paragraph (b)(1)(iii) of this section by using only the input parameters
contained in paragraphs (b)(1)(i) and (iv) of this section for each of the
submitted test points provided by the Commission. These test points are
based on information from U.S.-licensed geostationary satellite orbit
Fixed-Satellite Service and Broadcasting-Satellite Service operators in the
10.7-14.5 GHz bands. Each U.S.-licensed geostationary satellite orbit
Fixed-Satellite Service and Broadcasting-Satellite Service operator in the
10.7-14.5 GHz bands may submit up to 10 test points for this section
containing the latitude, longitude, altitude, azimuth, elevation angle,
antenna size, efficiency to be used by non-geostationary satellite orbit
Fixed-Satellite Service licensees in the 10.7-14.5 GHz bands during the
upcoming year.
(2) Operational equivalent power flux-density, space-to-Earth direction,
(operational EPFDdown) limits. Using the information contained in (b)(1) of
this section plus the measured space station antenna patterns, provide the
result of the execution of the computer simulation for the anticipated
in-line operational EPFDdown levels for each of the submitted test points
provided by the Commission. Submitted test points are based on inputs from
U.S.-licensed geostationary satellite orbit Fixed-Satellite Service and
Broadcasting-Satellite Service operators in the 10.7- 14.5 GHz bands. Each
U.S.-licensed geostationary satellite orbit Fixed-Satellite Service and
Broadcasting-Satellite Service operator in the 10.7-14.5 GHz bands may
submit up to 10 test points for this section containing the latitude,
longitude, altitude, azimuth, elevation angle, antenna size, efficiency to
be used by non-geostationary satellite orbit Fixed-Satellite Service
licensees in the 10.7-14.5 GHz bands during the upcoming year.
(c) [Reserved]
(d) The Commission may request at any time additional information from the
NGSO FSS system applicant or licensee concerning the EPFD levels and the
related technical showings.
(e) An NGSO FSS system licensee operating a system in compliance with the
limits specified in § 25.208(g), (i), (j), (k), (l), and (m) shall be
considered as having fulfilled its obligations under ITU Radio Regulations
Article 22.2 with respect to any GSO network. However, such NGSO FSS system
shall not claim protection from GSO FSS and BSS networks operating in
accordance with part 25 of this chapter and the ITU Radio Regulations.
(f) Coordination will be required between NGSO FSS systems and GSO FSS earth
stations in the frequency band 10.7-12.75 GHz when all of the following
threshold conditions are met:
(1) Bandwidth overlap; and
(2) The satellite network using the GSO has specific receive earth stations
which meet all of the following conditions: earth station antenna maximum
isotropic gain greater than or equal to 64 dBi; G/T of 44 dB/K or higher;
and emission bandwidth of 250 MHz; and the EPFDdown radiated by the
satellite system using the NGSO into the GSO specific receive earth station,
either within the U.S. for domestic service or any points outside the U.S.
for international service, as calculated using the ITU software for
examining compliance with EPFD limits set forth in Article 22 of the ITU
Radio Regulations exceeds −174.5 dB(W/(m2/40kHz)) for any percentage of time
for NGSO systems with all satellites only operating at or below 2500 km
altitude, or −202 dB(W/(m2/40kHz)) for any percentage of time for NGSO
systems with any satellites operating above 2500 km altitude.
(3) If there is no ITU software for examining compliance with EPFD limits
set forth in Article 22 of the ITU Radio Regulations, then the EPFDdown
coordination trigger is suspended and the requirement for coordination will
be based on bandwidth overlap and the satellite network using the GSO has
specific receive earth stations which meet all of the following conditions:
earth station antenna maximum isotropic gain greater than or equal to 64
dBi; G/T of 44 dB/K or higher; and emission bandwidth of 250 MHz.
(g) Operational power flux density, space-to-Earth direction, limits. Ninety
days prior to the initiation of service to the public, the NGSO FSS system
licensee shall submit a technical showing for the NGSO FSS system in the
band 12.2-12.7 GHz. The technical information shall demonstrate that the
NGSO FSS system is capable of meeting the limits as specified in § 25.208(o).
Licensees may not provide service to the public if they fail to demonstrate
compliance with the PFD limits.
(h) System License. Applicants authorized to construct and launch a system
of technically identical non-geostationary satellite orbit Fixed-Satellite
Service satellites will be awarded a single “blanket” license covering a
specified number of space stations to operate in a specified number of
orbital planes.
(i) In addition to providing the information specified in § 25.114, each NGSO
FSS applicant shall provide the following:
(1) A demonstration that the proposed system is capable of providing
fixed-satellite services on a continuous basis throughout the fifty states,
Puerto Rico and the U.S. Virgin Islands, U.S.; and
(2) A demonstration that the proposed system is capable of providing
Fixed-Satellite Services to all locations as far north as 70° North Latitude
and as far south as 55° South Latitude for at least 75 percent of every
24-hour period; and
(3) Sufficient information on the NGSO FSS system characteristics to
properly model the system in computer sharing simulations, including, at a
minimum, NGSO hand-over and satellite switching strategies, NGSO satellite
antenna gain patterns, and NGSO earth station antenna gain patterns. In
particular, each NGSO FSS applicant must explain the switching protocols it
uses to avoid transmitting while passing through the geostationary satellite
orbit arc, or provide an explanation as to how the PFD limits in § 25.208 are
met without using geostationary satellite orbit arc avoidance. In addition,
each NGSO FSS applicant must provide the orbital parameters contained in
Section A.4 of Annex 2A to Appendix 4 of the ITU Radio Regulations (2008).
Further, each NGSO FSS applicant must provide a sufficient technical showing
to demonstrate that the proposed non-geostationary satellite orbit system
meets the PFD limits contained in § 25.208, as applicable, and
(4) [Reserved]
(j)-(l) [Reserved]
(m) Replacement of Space Stations within the System License Term. Licensees
of NGSO FSS systems in the 10.7-12.7 GHz, 12.75-13.25 GHz and 13.75-14.5 GHz
frequency bands authorized through a blanket license pursuant to paragraph
(g) of this section need not file separate applications to launch and
operate technically identical replacement satellites within the term of the
system authorization. However, the licensee shall certify to the Commission,
at least thirty days prior to launch of such replacement(s) that:
(1) The licensee intends to launch a space station into the
previously-authorized orbit that is technically identical to those
authorized in its system authorization and
(2) Launch of this space station will not cause the licensee to exceed the
total number of operating space stations authorized by the Commission.
[ 66 FR 10619 , Feb. 16, 2001, as amended at 67 FR 53510 , Aug. 16, 2002; 68 FR 16447 , Apr. 4, 2003; 68 FR 43946 , July 25, 2003; 68 FR 51505 , Aug. 27, 2003;
69 FR 31302 , June 3, 2004; 70 FR 59277 , Oct. 12, 2005; 78 FR 8423 , Feb. 6,
2013; 79 FR 8320 , Feb. 12, 2014]
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Goto Section: 25.145 | 25.147
Goto Year: 2014 |
2016
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