Goto Section: 25.145 | 25.147 | Table of Contents
FCC 25.146
Revised as of October 1, 2014
Goto Year:2013 |
2015
§ 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 70DEG North
Latitude and as far south as 55DEG 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]
return arrow Back to Top
Goto Section: 25.145 | 25.147
Goto Year: 2013 |
2015
CiteFind - See documents on FCC website that
cite this rule
Want to support this service?
Thanks!
Report errors in
this rule. Since these rules are converted to HTML by machine, it's possible errors have been made. Please
help us improve these rules by clicking the Report FCC Rule Errors link to report an error.
hallikainen.com
Helping make public information public