Earth Exploration Satellite Service SpectrumRegulatory Considerations

1
Earth Exploration Satellite Service
Spectrum-Regulatory Considerations

• Thomas vonDeak
• NASA Spectrum Management Office
• Glenn Research Center
• 216-433-3277
• tvondeak_at_grc.nasa.gov
• July 16, 2002

2
Purpose of Presentation

• Purpose
• Provide overview of NASA Spectrum Management
  function
• Provide information regarding spectrum regulatory
  environment as it pertains to Earth Exploration
  Satellite Service (EESS)
• Provide reference material to be used by
  designers of EESS systems

3
Outline

• Outline
• Purpose of Spectrum Management
• RF Spectrum Regulatory Structure
• Definition of Services Relevant to EESS
• NASA Spectrum Management Roles and
  Responsibilities
• Overview of Spectrum Allocations Available for
  EESS
• S-Band (Uplink2025-2100 MHz, Forward2025-2110
  MHz)
• X-Band (Downlink8025-8400/8450-8500 MHz)
• Ku-Band (Forward13.75-14.0 GHz,
  Return14.8-15.35 GHz)
• Ka-Band (Downlink 25.5-27 GHz, Forward
  22.55-23.55 GHz, Return 25.25-27.5 GHz)
• Annexes
• On-Line Spectrum Management Resources
• Power Flux Density (PFD) Limits Band by Band
• Footnotes of the frequency tables shown

4
Purpose of Spectrum Management

• In General
• Ensure that systems that use the radio frequency
  (RF) spectrum comply with national statutory and
  international treaty obligations
• Ensure that a system in which time and money has
  been invested for development provides the
  required quality of service upon deployment and
  installation. Ensure that systems operate as
  intended -- they neither create more interference
  to other operating systems than is acceptable nor
  experience more interference from other operating
  systems than is acceptable.
• Apply order to the use of the orbit/spectrum
  resource
• Provide technical basis for coordination
• Promote the efficient use of the radio frequency
  spectrum
• Accommodate new services, applications, and
  technology

5
NASA Spectrum Management

• In addition to previous slide
• Assign operating radio frequencies in accordance
  with national and international allocations,
  service requirements, and authorizations
• Obtain Federal Government Certification and
  Frequency Authorization License for all NASA
  transmitters and receivers
• Compliance with OMB A-11 assuring that proposed
  RF equipment have the proper authorization prior
  to purchase (Regulation on Government controlled
  systems).
• Facilitate coordination of frequency assignments
  with other national and international agencies
• Obtain Radio Frequency Interference protection on
  a National and International level
• Protect the near-term and long-term national and
  international spectrum interests of NASA and
  their customers.

6
RF Spectrum Regulatory Structure

• Internationally, the use of the RF spectrum is
  governed by treaty, or on an exceptional basis,
  by agreements between countries
• The treaty obligations are set forth in the Radio
  Regulations (RR), which are administered by the
  International Telecommunication Union (ITU), a
  specialized agency of the United Nations.
• The ITU divides the RF spectrum into bands which
  are allocated to various classes of service, on a
  global basis, a regional basis (the ITU defines
  three Regions), or on a national basis (each
  administration can regulate the use of spectrum
  within its borders independent of the ITU).

7
RF Spectrum Regulatory Structure(continued)

• Nationally, in the United States and its
  possessions, the use of the RF spectrum is
  governed by law
• The Federal Communications Commission (FCC),
  acting under the authority of Congress, is
  responsible for the allocation and assignment of
  frequencies to non-Government users.
• Non-government operators pursue licensing of
  their transmitters through the FCC.
• The National Telecommunications and Information
  Administration (NTIA) is responsible for the
  allocation and assignment of frequencies to
  departments and agencies of the U.S. Government
• The NTIA performs its functions through the
  assistance of the Interdepartment Radio Advisory
  Committee (IRAC) and its subcommittees, of which
  NASA is an active member. The IRAC is
  responsible for maintaining the National Table of
  Frequency Allocations.
• NASA commonly pursues its frequency requirements
  through the NTIA and IRAC for transmitters that
  NASA has direct control of (may be through lease
  arrangement).

8
RF Spectrum Regulatory Structure(continued)

• In the US there are three types of spectrum
  administered by the FCC and the NTIA.
• Non-Government
• Government Only
• Shared (Non-Government and Government)
• FCC has the responsibility for licensing
  non-Government systems.
• NTIA has the responsibility for licensing
  Government systems.
• FCC and NTIA govern all spectrum together (for US
  and Possessions).

9
Definition of Relevant Services

• Earth Exploration-Satellite Service (EESS)
• A radiocommunication service between earth
  stations and one or more space stations, which
  may include links between space stations, in
  which
• information relating to the characteristics of
  the Earth and its natural phenomena, including
  data relating to the state of the environment, is
  obtained from active sensors or passive sensors
  on Earth satellites
• similar information is collected from airborne or
  Earth-based platforms
• information may be distributed to earth stations
  within the system concerned
• platform interrogation may be included
• This service may also include feeder links
  necessary for its operation.
• Space Operation Service (SOS)
• A radiocommunication service concerned
  exclusively with the operation of spacecraft, in
  particular space tracking, space telemetry and
  space telecommand
• Inter-Satellite Service (ISS)
• A radiocommunication service providing links
  between artificial satellites.
• eg., a relay from a sensing satellite to TDRS
  would use an ISS allocated frequency.

10
Comments Regarding LDCM RFP

• The LDCM RFP directs the awardee to operate and
  own (control) the space assets.
• Therefore, the awardee must pursue obtaining the
  necessary licensing through the FCC and
  international registration with the ITU through
  the FCC. International registration for systems
  is available only to Administrations and Sector
  Members of the ITU.
• If proposed, use of US Government-Only
  Allocations would be obtained by the awardee
  operating through the FCC. The FCC would
  negotiate with the NTIA (using the procedures of
  the IRAC). There is no guarantee that licensing
  would be obtained.

11
Overview of Relevant Allocations for EESS
Operations (Non-Deep Space)
12
Regions Defined in the ITU-R Radio Regulations

• The ITU-R Radio Regulations divides the world
  into three Regions

13
Considerations for Allocations in the S-Band

• Typically used for TTC
• The 2 GHz band best accommodates low data rate
  users requiring a necessary bandwidth of 5 to 8
  MHz or less (TBR)
• Provides all-weather communications links,
  regardless of spacecraft orientation
• Potential for increasing levels of RF
  interference as a result of more intense use by
  terrestrial services of shared bands and adjacent
  bands
• Unwanted emissions in the SRS deep space bands
  (2110-2120 MHz and 2290-2300 MHz) should be
  controlled per the guidelines established in
  Recommendation ITU-R SA.1157
• 2200-2290 MHz is available for Government use
  only. Very unlikely that EESS would be allowed
  access to this band for downlinks. (2285 2290
  MHz available for non-Government use through
  TDRSS)

14
S-Band Allocations
Note 2200-2290 MHz is for Government use only
in the USP. Any use of this band in the USP
would have to be a Government controlled asset.
15
Considerations for Allocations in theX-Band

• The 80258400 MHz band best accommodates low to
  moderate data rate EESS users with necessary
  bandwidths up to around 150 MHz (Typical but not
  mandatory-SFCG recommendation)
• Unwanted emissions from Earth Exploration
  Satellite Servive (EESS) (space-to-Earth)
  transmitters into the adjacent SRS deep space
  band (8400-8450 MHz) should be controlled per the
  guidelines established in Recommendation ITU-R
  SA.1157
• The transmission of 300 MHz in X-Band is
  technically possible but not encouraged due to
  the difficulty in coordinating with the other
  users in this band.
• Subject to PFD limits in Regions 1 3 per ITU-R
  RR S5.462A. Coordination of EESS earth stations
  with fixed systems may be difficult, especially
  in some Region 1 and 3 countries
• ITU-R studies are underway to determine suitable
  PFD limits on the emissions of EESS geostationary
  satellites in the 8025-8400 MHz band

16
X-Band Allocations
17
Considerations for Allocations in the Ku-Band

• The allocation supports TDRSS Intersatellite
  Service (ISS) (13.775 GHz forward / 15.0034 GHz
  return) on a secondary basis
• Ku-band allocations will remain secondary, except
  for forward links from particular TDRSS orbital
  locations with respect to Fixed-Satellite Service
  earth stations
• NTIA and DoD have consistently urged NASA to
  vacate the Ku-band forward link band due to
  concerns of interference from the emissions of
  FSS Earth stations as more of these stations are
  brought into service. However, the US (primarily
  NASA) is working within the ITU-R JTG 4-7-8 to
  address the degree of protection and the amount
  of protected bandwidth for the forward link. The
  goal is to incorporate these new provisions in
  the RR at WRC-03.

18
Ku-Band Allocations
19
Considerations for Allocations in theKa-Band

• The 22.55-23.55 GHz and 25.25-27.5 GHz bands are
  allocated to space-to-space links on a primary
  basis worldwide
• The 25.5-27 GHz band is allocated to EESS
  (space-to-Earth) links on a primary basis
  worldwide
• Bandwidth allocations in the Ka-Band allow for
  higher data rate telemetry transmissions (50 Msps
  and above)
• Narrower antenna beamwidths reduce potential for
  interference
• Ka-Band non-Government is secondary in the US

20
Ka-Band Allocations
The EESS allocation for this band is under
consideration for change in the US. NASA
anticipates EESS to have primary status when the
US process is complete and further anticipates
that this will occur before the end of the year
2003.
21
Annexes

• On-Line Spectrum Management Resources
• Power Flux Density (PFD) Limits Band by Band
• ITU-R Footnotes Referenced in Previous Tables
• US Footnotes Referenced in Previous Tables

22
Landsat 7 International Ground Station Network
 
This figure indicates most of the current
Wideband Downlink facilities available globally.
23
On-Line Spectrum Management Resources

• NTIA Office of Spectrum Management Web Site
• http//www.ntia.doc.gov
• NTIA Manual of Regulations Procedures for
  Federal Radio Frequency Management available for
  download in Adobe Acrobat Portable Document
  Format (PDF) http//www.ntia.doc.gov/osmhome/redbo
  ok/redbook.html
• Chapter 4. Allocations, Allotments and Plans
• Chapter 5. Spectrum Standards
• Chapter 10. Procedures for the Review of
  Telecommunication Systems for Frequency
  Availability and Electromagnetic Compatibility
  (EMC)
• ITU Web Site
• http//www.itu.int
• Overview of the ITU Radio Regulations
  http//www.itu.int/sns/radreg.html
• FCC Web Site
• http//www.fcc.gov/
• FCC's Table of Frequency Allocations
  http//www.fcc.gov/oet/spectrum/table/fcctable.pdf

24
Power Flux Density (PFD) Limits Band by Band

• PFD in any 4 kHz band within the bands 2025 -
  2110 MHz and 2200-2290 MHz
• r -154 0 ? d lt 5o
• r -154 0.5 (d - 5) 5o ? d lt 25o
• r -144 25o ? d lt 90o
• PFD in any 4 kHz band within the band 8025-8500
  MHz
• r -150 0 ? d lt 5o
• r -150 0.5 (d - 5) 5o ? d lt 25o
• r -140 25o ? d lt 90o
• PFD in any 4 kHz band within the band
  13.75-15.3.0 GHz except in the bands 14.3 - 14.4
  GHz and 14.47 - 14.5 GHz. (see Recommendation
  ITU-R SA.510)
• r -148 0 ? d lt 5o
• r -148 0.5 (d - 5) 5o ? d lt 25o
• r -138 25o ? d lt 90o
• PFD in any 1 MHz band within the bands
  22.55-23.55 GHz and 25.25-27.5 GHz
• r -115 0 ? d lt 5o
• r -115 0.5 (d - 5) 5o ? d lt 25o
• -105 25o ? d lt 90o
• Units for r are dB(W/m2) d is the elevation angle

25
ITU-R Footnotes Referenced in Previous Tables
26
ITU-R Footnotes Referenced in Previous Tables
(continued)
5.150 The following bands   13 553-13 567
kHz (centre frequency 13 560 kHz), 26 957-27 283
kHz (centre frequency 27 120 kHz), 40.66-40.70
MHz (centre frequency 40.68 MHz), 902-928
MHz in Region 2 (centre frequency 915
MHz), 2 400-2 500 MHz (centre frequency 2 450
MHz), 5 725-5 875 MHz (centre frequency 5 800
MHz), and 24-24.25 GHz (centre frequency
24.125 GHz) are also designated for industrial,
scientific and medical (ISM) applications.
Radiocommunication services operating within
these bands must accept harmful interference
which may be caused by these applications. ISM
equipment operating in these bands is subject to
the provisions of No. 15.13. 5.339 The bands
1 370-1 400 MHz, 2 640-2 655 MHz, 4 950-4 990 MHz
and 15.20-15.35 GHz are also allocated to the
space research (passive) and earth
exploration-satellite (passive) services on a
secondary basis.
27
ITU-R Footnotes Referenced in Previous Tables
(continued)
5.340 All emissions are prohibited in the
following bands 1 400-1 427 MHz, 2 690-2 700
MHz, except those provided for by Nos. 5.421 and
5.422, 10.68-10.7 GHz, except those provided
for by No. 5.483, 15.35-15.4 GHz, except those
provided for by No. 5.511, 23.6-24
GHz, 31.3-31.5 GHz, 31.5-31.8 GHz, in Region
2, 48.94-49.04 GHz, from airborne
stations, 50.2-50.4 GHz2, except those provided
for by No. 5.555A, 52.6-54.25 GHz, 86-92
GHz, 100-102 GHz, 109.5-111.8 GHz,
114.25-116 GHz, 148.5-151.5 GHz, 164-167
GHz, except those provided for by No. 5.563,
190-191.8 GHz, 200-209 GHz, 226-231.5 GHz,
250-252 GHz. (WRC-2000) 5.391 In making
assignments to the mobile service in the bands
2 025-2 110 MHz and 2 200-2 290 MHz,
administrations shall not introduce high-density
mobile systems, as described in Recommendation
ITU-R SA.1154, and shall take that Recommendation
into account for the introduction of any other
type of mobile system.    (WRC-97)
28
ITU-R Footnotes Referenced in Previous Tables
(continued)
5.392 Administrations are urged to take all
practicable measures to ensure that
space-to-space transmissions between two or more
non-geostationary satellites, in the space
research, space operations and Earth
exploration-satellite services in the bands
2 025-2 110 MHz and 2 200-2 290 MHz, shall not
impose any constraints on Earth-to-space,
space-to-Earth and other space-to-space
transmissions of those services and in those
bands between geostationary and non-geostationary
satellites. 5.462A In Regions 1 and 3 (except
for Japan), in the band 8 025-8 400 MHz, the
earth exploration-satellite service using
geostationary satellites shall not produce a
power flux-density in excess of the following
provisional values for angles of arrival (?),
without the consent of the affected
administration 174 dB(W/m2) in a 4 kHz
band for 0? ? ? ? 5? 174 0.5 (? 5)
dB(W/m2) in a 4 kHz band for 5? ? ? ?
25? 164 dB(W/m2) in a 4 kHz band for 25? ? ?
? 90? These values are subject to study under
Resolution 124 (WRC-97).     (WRC-97) 5.463 Airc
raft stations are not permitted to transmit in
the band 8 025-8 400 MHz.     (WRC-97) 5.499 Addi
tional allocation  in Bangladesh, India and
Pakistan, the band 13.25-14 GHz is also allocated
to the fixed service on a primary
basis. 5.500 Additional allocation  in Algeria,
Angola, Saudi Arabia, Bahrain, Brunei Darussalam,
Cameroon, Egypt, the United Arab Emirates, Gabon,
Indonesia, Iran (Islamic Republic of), Iraq,
Israel, Jordan, Kuwait, Lebanon, Madagascar,
Malaysia, Mali, Malta, Morocco, Mauritania,
Nigeria, Pakistan, Qatar, Syria, Senegal,
Singapore, Sudan, Chad and Tunisia, the band
13.4-14 GHz is also allocated to the fixed and
mobile services on a primary basis.     (WRC-2000)
5.501 Additional allocation  in Austria,
Azerbaijan, Hungary, Japan, Mongolia, Kyrgyzstan,
Romania, the United Kingdom and Turkmenistan, the
band 13.4-14 GHz is also allocated to the
radionavigation service on a primary
basis.     (WRC-2000)
29
ITU-R Footnotes Referenced in Previous Tables
(continued)
5.502 In the band 13.75-14 GHz, an earth station
in the fixed-satellite service shall have a
minimum antenna diameter of 4.5 m and the
e.i.r.p. of any emission should be at least 68
dBW and should not exceed 85 dBW. In addition the
e.i.r.p., averaged over one second, radiated by a
station in the radiolocation or radionavigation
services shall not exceed 59 dBW. The protection
of assignments to receiving space stations in the
fixed-satellite service operating with earth
stations that, individually, have an e.i.r.p. of
less than 68 dBW shall not impose constraints on
the operation of the radiolocation and
radionavigation stations operating in accordance
with the Radio Regulations. No. 5.43A does not
apply. See Resolution 733 (WRC-2000).     (WRC-200
0) 5.503 In the band 13.75-14 GHz, geostationary
space stations in the space research service for
which information for advance publication has
been received by the Bureau prior to
31 January 1992 shall operate on an equal basis
with stations in the fixed-satellite service
after that date, new geostationary space stations
in the space research service will operate on a
secondary basis. Until those geostationary space
stations in the space research service for which
information for advance publication has been
received by the Bureau prior to 31 January 1992
cease to operate in this band the e.i.r.p.
density of emissions from any earth station in
the fixed-satellite service operating with a
space station in geostationary-satellite orbit
shall not exceed 71 dBW in the 6 MHz band from
13.772 to 13.778 GHz the e.i.r.p. density of
emissions from any earth station in the
fixed-satellite service operating with a space
station in non-geostationary-satellite orbit
shall not exceed 51 dBW in the 6 MHz band from
13.772 to 13.778 GHz. Automatic power control
may be used to increase the e.i.r.p. density in
the 6 MHz band in this frequency range to
compensate for rain attenuation, to the extent
that the power flux-density at the
fixed-satellite service space station does not
exceed the value resulting from use by an earth
station of an e.i.r.p. of 71 dBW or 51 dBW, as
appropriate, in the 6 MHz band in clear-sky
conditions.     (WRC-2000) 5.503A Until 1
January 2000, stations in the fixed-satellite
service shall not cause harmful interference to
non-geostationary space stations in the space
research and Earth exploration-satellite
services. After that date, these
non-geostationary space stations will operate on
a secondary basis in relation to the
fixed-satellite service. Additionally, when
planning earth stations in the fixed-satellite
service to be brought into service between 1
January 2000 and 1 January 2001, in order to
accommodate the needs of spaceborne precipitation
radars operating in the band 13.793-13.805 GHz,
advantage should be taken of the consultation
process and the information given in
Recommendation ITU-R SA.1071.
30
ITU-R Footnotes Referenced in Previous Tables
(continued)
5.510 The use of the band 14.5-14.8 GHz by the
fixed-satellite service (Earth-to-space) is
limited to feeder links for the
broadcasting-satellite service. This use is
reserved for countries outside Europe. 5.532 The
use of the band 22.21-22.5 GHz by the Earth
exploration-satellite (passive) and space
research (passive) services shall not impose
constraints upon the fixed and mobile, except
aeronautical mobile, services. 5.536 Use of the
25.25-27.5 GHz band by the inter-satellite
service is limited to space research and Earth
exploration-satellite applications, and also
transmissions of data originating from industrial
and medical activities in space. 5.536A Administr
ations installing Earth exploration-satellite
service earth stations cannot claim protection
from stations in the fixed and mobile services
operated by neighbouring administrations. In
addition, earth stations operating in the Earth
exploration-satellite service should take into
account Recommendation ITU-R SA.1278.     (WRC-200
0) 5.536B In Germany, Saudi Arabia, Austria,
Belgium, Brazil, Bulgaria, China, Korea (Rep.
of), Denmark, Egypt, United Arab Emirates, Spain,
Estonia, Finland, France, Hungary, India, Iran
(Islamic Republic of), Ireland, Israel, Italy,
Jordan, Kenya, Kuwait, Lebanon, Libya,
Liechtenstein, Lithuania, Moldova, Norway, Oman,
Uganda, Pakistan, the Philippines, Poland,
Portugal, Syria, Slovakia, the Czech Rep.,
Romania, the United Kingdom, Singapore, Sweden,
Switzerland, Tanzania, Turkey, Viet Nam and
Zimbabwe, earth stations operating in the Earth
exploration-satellite service in the band
25.5-27 GHz shall not claim protection from, or
constrain the use and deployment of, stations of
the fixed and mobile services.     (WRC-97)
31
US Footnotes Referenced in Previous Tables
G59--In the bands 902-928 MHz, 3100-3300 MHz,
3500-3700 MHz, 5250-5350 MHz, 8500-9000 MHz,
9200-9300 MHz, 13.4-14.0 GHz, 15.7-17.7 GHz and
24.05-24.25 GHz, all Government non-military
radiolocation shall be secondary to military
radiolocation, except in the subband 15.7-16.2
GHz airport surface detection equipment (ASDE) is
permitted on a co-equal basis subject to
coordination with the military departments   G104-
-In the bands 7450-7550 and 8175-8215 MHz, it is
agreed that although the military space radio
communication systems, which include earth
stations near the proposed meteorological-satellit
e installations will precede the
meteorological-satellite installations,
engineering adjustments to either the military or
the meteorological-satellite systems or both will
be made as mutually required to assure compatble
operations of the systems concerned.   G117--In
the bands 7250-7750,7900-8400 MHz and 17.8-21.2,
30-31, 39.5-40.5, 43.5-45.5 and 50.4-51.4 GHz the
Government fixed-satellite and mobile-satellite
services are limited to military
systems.   US90--In the band 2025-2110 MHz
Earth-to-space and space-to-space transmissions
may be authorized in the space research and earth
exploration-satellite services subject to such
conditions as may be applied on a case-by-case
basis. Such transmissions shall not cause harmful
interference to non-Government stations operating
in accordance with the Table of Frequency
Allocations. All space-to-space transmission
reaching the earth's surface shall adhere to a
power flux density of between -144 and -154
dBw/m2/4 kHz depending on the angle of arrival
per ITU Radio Regulation 2557 and shall not cause
harmful interference to the other space
services.   US110--In the frequency bands
3100-3300 MHz, 3500-3700 MHz, 5250-5350 MHz,
8500-9000 MHz, 9200-9300 MHz, 9500-10000 MHz,
13.4-14.0 GHz, 15.7-17.3 GHz, 24.05-24.25 GHz and
33.4-36 GHz, the non-Government radiolocation
service shall be secondary to the Government
radiolocation service and to airborne doppler
radars at 8800 MHz, and shall provide protection
to airport surface detection equipment (ASDE)
operating between 15.7-16.2 GHz  
32
US Footnotes Referenced in Previous Tables
(continued)
US211--In the bands 1670-1690, 5000-5250 MHz, and
10.7-11.7, 15.1365-15.35, 15.4-15.7, 22.5-22.55,
24-24.05, 31.0-31.3, 31.8-32, 40.5-42.5, 84-86,
102-105, 116-126, 151-164, 176.5-182, 185-190,
231-235, 252-265 GHz, applicants for airborne or
space station assignments are urged to take all
practicable steps to protect radio astronomy
observations in the adjacent bands from harmful
interference however, US74 applies.   US222--In
the band 2025-2035 MHz Geostationary Operational
Environmental Satellite Earth stations in the
Space Research and Earth Exploration-Satellite
Services may be authorized on a co-equal basis to
use the frequency band 2025-2035 MHz for
Earth-to-space transmissions for tracking,
telemetry, and telecommand at the sites listed
below Wallops Is., VA., 37o50'48"N
75o27'33"W. Seattle, WA., 47o34'15"N
122o33'10"W. Honolulu, HI., 21o21'12"N
157o52'36"W. US246--No stations will be
authorized to transmit in the bands 608-614 MHz,
1400-1427 MHz, 1660.5-1668.4 MHz, 2690-2700 MHz,
4990-5000 MHz, 10.68-10.70 GHz, 15.35-15.40 GHz,
23.6-24.0 GHz, 31.3-31.8 GHz, 51.4-54.25 GHz,
58.2-59.0 GHz, 64-65 GHz, 86-92 GHz, 100-102 GHz,
105-116 GHz, 164-168 GHz, 182-185 GHz and 217-231
GHz   US258--In the band 8025-8400 MHz, the
non-Government earth exploration-satellite
service (space-to-Earth) is allocated on a
primary basis. Authorizations are subject to a
case-by-case electromagnetic compatibility
analysis.   US263--In the frequency bands
21.2-21.4, 22.21-22.5, 36-37, 50.2-50.4,
54.25-58.2, 116-126, 150-151, 174.5-176.5,
200-202 and 235-238 GHz, the Space Research and
the Earth Exploration-Satellite Services shall
not receive protection from the Fixed and Mobile
Services operating in accordance with the Table
of Frequency Allocations.
33
US Footnotes Referenced in Previous Tables
(continued)
US303--In the band 2285-2290 MHz, non-Federal
government space stations in the space research,
space operations and earth exploration-satellite
services may be authorized to transmit to the
Tracking and Data Relay Satellite System subject
to such conditions as may be applied on a
case-by-case basis. Such transmissions shall not
cause harmful interference to authorized Federal
government stations. The power flux density at
the Earth's surface from such non-Government
stations shall not exceed -144 to -154
dBW/m2/4 kHz, depending on angle of arrival, in
accordance with ITU Radio Regulation
S21.16.   US337--In the band 13.75-13.80 GHz,
earth stations in the fixed-satellite service
shall be coordinated on a case-by-case basis
through the frequency assignment subcommittee in
order to minimize harmful interference to the
Tracking and Data Relay Satellite System's
forward space-to-space link (TDRSS forward
link-to-LEO).   US346 Except as provided by
footnote US222, the use of the band 2025-2110 MHz
by the Government space operation service
(Earth-to-space), Earth exploration-satellite
service (Earth-to-space), and space research
service (Earth-to-space) shall not constrain the
deployment of the Television Broadcast Auxiliary
Service, the Cable Television Relay Service, or
the Local Television Transmission Service. To
facilitate compatible operations between
non-Government terrestrial receiving stations at
fixed sites and Government earth station
transmitters, coordination is required. To
facilitate compatible operations between
non-government terrestrial transmitting stations
and Government spacecraft receivers, the
terrestrial transmitters shall not be
high-density systems (see Recommendations ITU-R
SA.1154 and ITU-R F.1247).   US347 In the band
2025-2110 MHz, non-Government Earth-to-space and
space-to-space transmissions may be authorized in
the space research and Earth exploration-satellite
services subject to such conditions as may be
applied on a case-by-case basis. Such
transmissions shall not cause harmful
interference to Government and non-Government
stations operating in accordance with the Table
of Frequency Allocations.
34
US Footnotes Referenced in Previous Tables
(continued)
US356-- In the band 13.75-14 GHz, an earth
station in the fixed-satellite service shall have
a minimum antenna diameter of 4.5 m and the
e.i.r.p. of any emission should be at least 68
dBW and should not exceed 85 dBW. In addition the
e.i.r.p., averaged over one second, radiated by a
station in the radiolocation service towards the
geostationary-satellite orbit shall not exceed 59
dBW. Receiving space stations in the
fixed-satellite service shall not claim
protection from radiolocation transmitting
stations operating in accordance with the United
States Table of Frequency Allocations. ITU Radio
Regulation No. S5.43A does not apply US357-- In
the band 13.75-14 GHz, geostationary space
stations in the space research service for which
information for advance publication has been
received by the ITU Radiocommunication Bureau
(Bureau) prior to 31 January 1992 shall operate
on an equal basis with stations in the
fixed-satellite service after that date, new
geostationary space stations in the space
research service will operate on a secondary
basis. Until those geostationary space stations
in the space research service for which
information for advance publication has been
received by the Bureau prior to 31 January 1992
cease to operate in this band a. The e.i.r.p.
density of emissions from any earth station in
the fixed-satellite service operating with a
space station in geostationary-satellite orbit
shall not exceed 71 dBW in any 6 MHz band from
13.77 to 13.78 GHz b. The e.i.r.p. density of
emissions from any earth station in the
fixed-satellite service operating with a space
station in non-geostationary-satellite orbit
shall not exceed 51 dBW in any 6 MHz band from
13.77 to 13.78 GHz. Automatic power control may
be used to increase the e.i.r.p. density in any 6
MHz band in these frequency ranges to compensate
for rain attenuation, to the extent that the
power flux-density at the fixed-satellite service
space station does not exceed the value resulting
from use by an earth station of an e.i.r.p. of 71
dBW or 51 dBW, as appropriate, in any 6 MHz band
in clear-sky conditions.