U.S. Non-Federal-Government Allocations
METEOROLOGICAL AIDS (radiosonde)
METEOROLOGICAL-SATELLITE (space-to-Earth) US88
SpectrumWiki
Radio spectrum allocations
Look up a frequency or a range.
Examples: 88.5 MHz, 1350–1430 MHz, 2.4 GHz
1.675 GHz (1,675,000,000 Hz)
U.S. Federal Government Allocations
METEOROLOGICAL AIDS (radiosonde)
METEOROLOGICAL-SATELLITE (space-to-Earth) US88
ITU Region 1 Allocations
METEOROLOGICAL AIDS
FIXED
METEOROLOGICAL-SATELLITE (space-to-Earth)
MOBILE except aeronautical mobile
ITU Region 2 Allocations
METEOROLOGICAL AIDS
FIXED
METEOROLOGICAL-SATELLITE (space-to-Earth)
MOBILE except aeronautical mobile
ITU Region 3 Allocations
METEOROLOGICAL AIDS
FIXED
METEOROLOGICAL-SATELLITE (space-to-Earth)
MOBILE except aeronautical mobile
Footnotes
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5.341 In the bands 1 400-1 727 MHz, 101-120 GHz and 197-220 GHz, passive research is being conducted by some countries in a programme for the search for intentional emissions of extraterrestrial origin.
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US88 In the bands 1675-1695 MHz and 1695-1710 MHz, the following provisions shall apply:
(a) Non-Federal use of the band 1695-1710 MHz by the fixed and mobile except aeronautical mobile services is restricted to stations in the Advanced Wireless Service (AWS). Base stations that enable AWS mobile and portable stations to operate in the band 1695-1710 MHz must be successfully coordinated prior to operation as follows: (i) all base stations within the 27 protection zones listed in paragraph (b) that enable mobiles to operate at a maximum e.i.r.p. of 20 dBm, and (ii) nationwide for base stations that enable mobiles to operate with a maximum e.i.r.p. greater than 20 dBm, up to a maximum e.i.r.p. of 30 dBm, unless otherwise specified by Commission rule, order, or notice.
(b) Forty-seven Federal earth stations located within the protection zones listed below operate on a co-equal, primary basis with AWS operations. All other Federal earth stations operate on a secondary basis.
(1) Protection zones for Federal earth stations receiving in the band 1695-1710 MHz:
State Location Latitude Longitude Radius (km) AK Barrow 71° 19' 22'' 156° 36' 41'' 35 AK Elmendorf AFB 61° 14' 08'' 149° 55' 31'' 98 AK Fairbanks 64° 58' 22'' 147° 30' 02'' 20 AZ Yuma 32° 39' 24'' 114° 36' 22'' 95 CA Monterey 36° 35' 34'' 121° 51' 20'' 76 CA Twenty-Nine Palms 34° 17' 46'' 116° 09' 44'' 80 FL Miami 25° 44' 05'' 080° 09' 45'' 51 HI Hickam AFB 21° 19' 18'' 157° 57' 30'' 28 MD Suitland 38° 51' 07'' 076° 56' 12'' 98 MS Stennis Space Center 30° 21' 23'' 089° 36' 41'' 57 SD Sioux Falls 43° 44' 09'' 096° 37' 33'' 42 VA Wallops Island 37° 56' 45'' 075° 27' 45'' 30 GU Andersen AFB 13° 34' 52'' 144° 55' 28'' 42 (2) Protection zones for Federal earth stations receiving in the band 1675-1695 MHz:
State Location Latitude Longitude Radius (km) CA Sacramento 38° 35' 50'' 121° 32' 34'' 55 CO Boulder 39° 59' 26'' 105° 15' 51'' 02 ID Boise 43° 35' 42'' 116° 13' 49'' 39 IL Rock Island 41° 31' 04'' 090° 33' 46'' 19 MO Kansas City 39° 16' 40'' 094° 39' 44'' 40 MO St. Louis 38° 35' 26'' 090° 12' 25'' 34 MS Columbus Lake 33° 32' 04'' 088° 30' 06'' 03 MS Vicksburg 32° 20' 47'' 090° 50' 10'' 16 NE Omaha 41° 20' 56'' 095° 57' 34'' 30 OH Cincinnati 39° 06' 10'' 084° 30' 35'' 32 OK Norman 35° 10' 52'' 097° 26' 21'' 03 TN Knoxville 35° 57' 58'' 083° 55' 13'' 50 WV Fairmont 39° 26' 02'' 080° 11' 33'' 04 PR Guaynabo 18° 25' 26'' 066° 06' 50'' 48 Note: The coordinates are specified in the conventional manner (North latitude, West longitude), except that the Guam (GU) entry is specified in terms of East longitude.
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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, 31.8-32.0, 40.5-42.5, 116-122.25, 123-130, 158.5-164, 167-168, 191.8-200, and 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.
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US289 In the bands 460-470 MHz and 1690-1695 MHz, the following provisions shall apply:
(a) In the band 460-470 MHz, space stations in the Earth exploration-satellite service (EESS) may be authorized for space-to-Earth transmissions on a secondary basis with respect to the fixed and mobile services. When operating in the meteorological-satellite service, such stations shall be protected from harmful interference from other EESS applications. The power flux density produced at the Earth’s surface by any space station in this band shall not exceed −152 dBW/m²/4 kHz.
(b) In the band 1690-1695 MHz, EESS applications, other than the meteorological-satellite service, may also be used for space-to-Earth transmissions subject to not causing harmful interference to stations operating in accordance with the Table of Frequency Allocations.
Wiki entries
Radiosondes
Current Use
1675–1685 MHz Radiosondes
According to the U.S. National Weather Service:
In order to understand the dynamic processes that result in the weather we experience, we need to know what is happening through the entire atmosphere. These observations are primarily taken with the aid of radiosondes.
The radiosonde is a small instrument package that is suspended below balloon filled with either hydrogen or helium. As the radiosonde is carried aloft, it measures pressure, temperature, and relative humidity.
These sensors are linked to a battery-powered radio transmitter that sends the information to a ground receiver. By tracking the position of the radiosonde in flight via GPS (Global Positioning System), measurements of wind speed and direction aloft is also obtained.
Worldwide, most radiosonde observations are taken daily at 00Z and 12Z (6 a.m. and 6 p.m. EST). With worldwide coordination of these upper air observations, we can obtain a picture of the various pressure and wind patterns across the globe.
Radiosonde observations technically provide only pressure, temperature, and relative humidity data; the tracked position of a radiosonde is actually called a rawinsonde observation and is used to obtain wind speed and direction. However, meteorologists and other data users frequently refer to them as part of the radiosonde observation.
The radiosonde flight can last in excess of two hours, and during this time the radiosonde can ascend to over 115,000 feet (35,000 m) and drift more than 125 miles (200 km) from the release point. During the flight, the radiosonde is exposed to temperatures as cold as -130°F (-92°C) and air pressures of only a few hundredths of what is found on the Earth's surface.
When the balloon has expanded beyond its elastic limit (20-25 feet in diameter) and bursts, the radiosonde returns to Earth via a small parachute. This slows its descent, minimizing the danger to life and property.
If found, radiosondes are safe to handle, as long as the balloon is deflated. Cut the string to the balloon/parachute and place them in a trash receptacle. You may also dispose of the radiosonde itself or keep it.
Worldwide, there are about 1,300 upper-air stations. Observations are made by the NWS at 92 stations: 69 in the conterminous United States, 13 in Alaska, nine in the Pacific, and one in Puerto Rico.
NWS supports the operation of 10 other stations in the Caribbean. Through international agreements, data are exchanged between countries worldwide.
In order to understand the dynamic processes that result in the weather we experience, we need to know what is happening through the entire atmosphere. These observations are primarily taken with the aid of radiosondes.
The radiosonde is a small instrument package that is suspended below balloon filled with either hydrogen or helium. As the radiosonde is carried aloft, it measures pressure, temperature, and relative humidity.
These sensors are linked to a battery-powered radio transmitter that sends the information to a ground receiver. By tracking the position of the radiosonde in flight via GPS (Global Positioning System), measurements of wind speed and direction aloft is also obtained.
Worldwide, most radiosonde observations are taken daily at 00Z and 12Z (6 a.m. and 6 p.m. EST). With worldwide coordination of these upper air observations, we can obtain a picture of the various pressure and wind patterns across the globe.
Radiosonde observations technically provide only pressure, temperature, and relative humidity data; the tracked position of a radiosonde is actually called a rawinsonde observation and is used to obtain wind speed and direction. However, meteorologists and other data users frequently refer to them as part of the radiosonde observation.
The radiosonde flight can last in excess of two hours, and during this time the radiosonde can ascend to over 115,000 feet (35,000 m) and drift more than 125 miles (200 km) from the release point. During the flight, the radiosonde is exposed to temperatures as cold as -130°F (-92°C) and air pressures of only a few hundredths of what is found on the Earth's surface.
When the balloon has expanded beyond its elastic limit (20-25 feet in diameter) and bursts, the radiosonde returns to Earth via a small parachute. This slows its descent, minimizing the danger to life and property.
If found, radiosondes are safe to handle, as long as the balloon is deflated. Cut the string to the balloon/parachute and place them in a trash receptacle. You may also dispose of the radiosonde itself or keep it.
Worldwide, there are about 1,300 upper-air stations. Observations are made by the NWS at 92 stations: 69 in the conterminous United States, 13 in Alaska, nine in the Pacific, and one in Puerto Rico.
NWS supports the operation of 10 other stations in the Caribbean. Through international agreements, data are exchanged between countries worldwide.