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Engineering data
Allocations
U.S. Non-Federal-Government Allocations
7235
-
7250
MHz
5.458
FCC Rule Parts:
RF Devices (15)
U.S. Federal Government Allocations
7235
-
7250
MHz
FIXED
5.458
ITU Region 1 Allocations
7235
-
7250
MHz
FIXED
MOBILE
5.458
ITU Region 2 Allocations
7235
-
7250
MHz
FIXED
MOBILE
5.458
ITU Region 3 Allocations
7235
-
7250
MHz
FIXED
MOBILE
5.458
SpectrumWiki
Wideband Global SATCOM (WGS) System
NASA Deep Space Network (DSN)
Unlicensed Level Probing Radars
Wideband Systems under 15.250
Possible allocations for FSS and maritime mobile-satellite service, 2015 World Radiocommunication Conference (WRC-15) Agenda Item 1.9
Possible new FSS and maritime mobile-satellite allocations, 2015 World Radiocommunication Conference (WRC-15) Agenda Item 1.9
Possible new primary EESS allocation (WRC-15 Agenda Item 1.11)
More...
Footnotes
5.458
In the band 6425-7075 MHz, passive microwave sensor measurements are carried out over the oceans. In the band 7075-7250 MHz, passive microwave sensor measurements are carried out. Administrations should bear in mind the needs of the Earth exploration-satellite (passive) and space research (passive) services in their future planning of the bands 6425-7025 MHz and 7075-7250 MHz.
SpectrumWiki
Band Uses (7.235 - 7.25 GHz)
Wideband Global SATCOM (WGS) System
The Wideband Global SATCOM (WGS) System provides fixed site satellite service at X-band and Ka-band from geosynchronous earth orbit in support of US military operations worldwide.
As of April 2013, four WGS satellites are in orbit, a fifth is scheduled for launch in 2013, a sixth has completed testing, and four more are being built.
Paired Frequency Bands
Paired Bands
Use
Service
Table
7250
-
7750
MHz
X-band downlink
Fixed-satellite
F
7900
-
8400
MHz
X-band uplink
Fixed-satellite
F
20.2
-
21.2
GHz
Ka-band downlink
Fixed-satellite
-
30
-
31
GHz
Ka-band uplink
Fixed-satellite
-
External Links:
WGS Article on Wikipedia
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NASA Deep Space Network (DSN)
According to NASA:
"The NASA Deep Space Network - or DSN - is an international network of antennas that supports interplanetary spacecraft missions and radio and radar astronomy observations for the exploration of the solar system and the universe. The network also supports selected Earth-orbiting missions.
"The DSN currently consists of three deep-space communications facilities placed approximately 120 degrees apart around the world: at Goldstone, in California's Mojave Desert; near Madrid, Spain; and near Canberra, Australia. This strategic placement permits constant observation of spacecraft as the Earth rotates, and helps to make the DSN the largest and most sensitive scientific telecommunications system in the world."
Frequency Bands
Band
Use
Service
Table
25.5
-
27
GHz
DSN K-Band Downlink (from spacecraft less than 2 million km from Earth)
Space Research (space-to-Earth)
F
Paired Frequency Bands
Paired Bands
Use
Service
Table
2025
-
2110
MHz
DSN S-Band Uplink (to spacecraft less than 2 million km from Earth)
Space Research (Earth-to-space)
F
2200
-
2290
MHz
DSN S-Band Downlink (from spacecraft less than 2 million km from Earth)
Space Research (space-to-Earth)
F
2110
-
2120
MHz
DSN S-Band Uplink (to spacecraft more than 2 million km from Earth)
Space Research (Earth-to-space)
F
2290
-
2300
MHz
DSN S-Band Downlink (from spacecraft more than 2 million km from Earth)
Space Research (deep space)
F
7145
-
7190
MHz
DSN X-Band Uplink (to spacecraft more than 2 million km from Earth)
Space Research (Earth-to-space)
F
8400
-
8450
MHz
DSN X-Band Downlink (from spacecraft more than 2 million km from Earth)
Space Research (deep space)
F
7190
-
7235
MHz
DSN X-Band Uplink (to spacecraft less than 2 million km from Earth)
Space Research (Earth-to-space)
F
8450
-
8500
MHz
DSN X-Band Downlink (from spacecraft less than 2 million km from Earth)
Space Research (space-to-Earth)
F
31.8
-
32.3
GHz
DSN Ka-Band Downlink (from spacecraft more than 2 million km from Earth)
Space Research (deep space)
F
34.2
-
34.7
GHz
DSN Ka-Band Uplink (to spacecraft more than 2 million km from Earth)
Space Research (Earth-to-space)
F
External Links:
NASA Deep Space Network
NASA DSN Frequency and Channel Assignments (DSN 810-005 part 201)
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Unlicensed Level Probing Radars
The FCC has released a Notice of Proposed Rule Making that would allow downward-pointing, unlicensed level probing radars, for use both in tanks and outdoors, at 5.925-7.250, 24.05-29, and 75-85 GHz.
Proposed EIRP boresight emissions limits are:
5.925-7.250 GHz: -33 dBm/MHz average and +7 dBm across 50 MHz.
24.05-29 GHz: -14 dBm/MHz average and +26 dBm across 50 MHz
75-85 GHz: -3 dBm/MHz average and +34 dBm across 50 MHz
Proposed average emissions limits to the sides and upward are:
5.925-7.250 GHz: -55 dBm/MHz
24.05-29 GHz: -41.3 dBm/MHz
75-85 GHz: -41.3 dBm/MHz
Frequency Bands
Band
Use
Service
Table
5925
-
7250
MHz
-
-
N
24.05
-
29
GHz
-
-
N
75
-
85
GHz
-
-
N
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Wideband Systems under 15.250
Part 15 of the FCC's rules accommodates operation of wideband systems in this band. The -10 dB bandwidth of the systems must be at least 50 MHz, but must be fully contained within 5925-7250 MHz. Average power of the devices is limited to -41.3 dBm. Peak power can be as high as 0 dBm across 50 MHz, which makes the band suitable for devices that generate a wideband signal by emitting a train of short pulses. Devices under this rule section may not be operated aboard aircraft or satellites.
Frequency Bands
Band
Use
Service
Table
5925
-
7250
MHz
Wideband systems (FCC part 15.250)
-
N
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Possible allocations for FSS and maritime mobile-satellite service, 2015 World Radiocommunication Conference (WRC-15) Agenda Item 1.9
1.9 to consider, in accordance with Resolution COM6/15 (WRC-12):
1.9.1 possible new allocations to the fixed-satellite service in the frequency bands 7 150-7 250 MHz (space-to-Earth) and 8 400-8 500 MHz (Earth-to-space), subject to appropriate sharing conditions;
1.9.2 the possibility of allocating the bands 7 375-7 750 MHz and 8 025-8 400 MHz to the maritime-mobile satellite service and additional regulatory measures, depending on the results of appropriate studies;
Frequency Bands
Band
Use
Service
Table
7150
-
7250
MHz
Agenda Item 1.9.1
Fixed-satellite (space-to-Earth)
-
7375
-
7750
MHz
Agenda Item 1.9.2 (maritime mobile-satellite)
Mobile-satellite
-
8025
-
8400
MHz
Agenda Item 1.9.2 (maritime mobile-satellite)
Mobile-satellite
-
8400
-
8500
MHz
Agenda Item 1.9.1
Fixed-satellite (Earth-to-space)
-
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Possible new FSS and maritime mobile-satellite allocations, 2015 World Radiocommunication Conference (WRC-15) Agenda Item 1.9
1.9 to consider, in accordance with Resolution COM6/15 (WRC-12):
1.9.1 possible new allocations to the fixed-satellite service in the frequency bands 7 150-7 250 MHz (space-to-Earth) and 8 400-8 500 MHz (Earth-to-space), subject to appropriate sharing conditions;
1.9.2 the possibility of allocating the bands 7 375-7 750 MHz and 8 025-8 400 MHz to the maritime-mobile satellite service and additional regulatory measures, depending on the results of appropriate studies
Frequency Bands
Band
Use
Service
Table
7150
-
7250
MHz
WRC-15 Agenda Item 1.9.1
Fixed-satellite (space-to-Earth)
-
8400
-
8500
MHz
WRC-15 Agenda Item 1.9.1
Fixed-satellite (Earth-to-space)
-
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Possible new primary EESS allocation (WRC-15 Agenda Item 1.11)
ITU World Radiocommunication Conference 2015 Agenda Item 1.11:
"To consider a primary allocation for the Earth exploration-satellite service (Earth-to-space) in the 7-8 GHz range, in accordance with Resolution 650 (WRC-12)"
Frequency Bands
Band
Use
Service
Table
7000
-
8000
MHz
Possible new primary EESS allocation (WRC-15 agenda item 1.11)
Earth Exploration-satellite (Earth-to-space)
-
External Links:
ITU-R Preparatory Studies for WRC-15
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Related Documents, Links, and Multimedia:
FCC Proceeding (1)
Further Notice of Proposed Rule Making on Regulations for Level Probing Radars
In this Further Notice of Proposed Rule Making (FNPRM), we are expanding the scope of
the above-referenced proceeding to propose a set of technical rules for the operation of unlicensed
level probing radars (LPR) in several frequency bands. LPR devices are low-power radars that
measure the level (relative height) of various substances in man-made or natural containments. In
open-air environments, LPR devices may be used to measure levels of materials such as coal piles or
water basin levels. An LPR device also may be installed inside an enclosure, e.g., a tank made of
materials such as steel or fiberglass and commonly referred to as a tank level probing radar (TLPR)
that could be filled with liquids or granulates. In the Notice of Proposed Rule Making and Order
(Notice and Order) in this proceeding, we proposed rules applicable only to TLPR devices for
operation in the 77-81 GHz band inside steel and concrete tanks, as that was the use requested by the
initial proponents. During the pendency of the rulemaking proceeding, but outside this proceeding, we received waiver requests and other inquiries regarding outdoor use on additional frequencies
under existing Part 15 rules for unlicensed devices.4 To address the apparent need for a
comprehensive and consistent approach to LPR devices, we are proposing in this FNPRM rules that
would apply to the operation of LPR devices installed in both open-air environments and inside
storage tanks in the following frequency bands: 5.925-7.250 GHz, 24.05-29.00 GHz, and 75-85 GHz.
Frequencies/Bands
5925
-
7250
MHz
24.05
-
29
GHz
75
-
85
GHz
Document type and status:
FCC proceeding (Current)
Document date or date of hyperlink query:
March 28, 2012
Fcc Docket(s):
ET 10-23
Further Notice of Proposed Rule Making on Regulations for Level Probing Radars
Edit...
Engineering Data
Lower Frequency
Center Frequency
Upper Frequency
Frequency
7.235 GHz
7.2425 GHz
7.25 GHz
Wavelength
4.1 cm
4.1 cm
4.1 cm
Band designator(s)
SHF; C-band (IEEE)
SHF; C-band (IEEE)
SHF; C-band (IEEE)
Isotropic collecting area
1.4 cm
2
1.4 cm
2
1.4 cm
2
Free space loss (1 m)
49.6 dB
49.6 dB
49.7 dB
Free space loss (1 km)
109.6 dB
109.6 dB
109.7 dB
Free space loss (10 km)
129.6 dB
129.6 dB
129.7 dB
Free space loss (100 km)
149.6 dB
149.6 dB
149.7 dB
Free space loss (1000 km)
169.6 dB
169.6 dB
169.7 dB
Free space loss
(35,786 km = GEO orbit)
200.7 dB
200.7 dB
200.7 dB
Free space loss (378,370 km = Moon)
221.2 dB
221.2 dB
221.2 dB