22 – 22.7 EHF, Extremely High Frequency radio, CMBR Cosmic Microwave Background Radiation from outer space and Somalia photos 41.
5 February 2021.
Extremely High Frequency EHF radio.
EHF CMBR Cosmic Microwave Background Radiation from outer space,
Experimental Radio,
Outer space radio.
Radio Astronomy.
Amateur Radio,
Satellites,
Radar.
The All Frequency Database Index is here: http://sites.google.com/site/somaliaamateurradio/somaliaphotos10
You are here:
Extremely High Frequency.
22. EHF Radio Communications and Emissions.
22.1 EHF Amateur Radio.
22.2 EHF Cosmic Microwave Background Radiation from outer space.
22.3 EHF Experimental Radio.
22.4 EHF Military radio.
22.5 EHF Radar.
22.6 EHF Radio Astronomy.
22.7 EHF Satellites.
22.
EHF Radio Communications and Emissions.
EHF 30000 – 300000 MHz.
EHF 30 – 300 GHz.
EHF 30000 MHz – 300 GHz.
EHF 30 GHz – 300 GHz.
EHF 30000 MHz – 300000 MHz.
EHF 30000000 – 300000000 kHz.
EHF 30000000 kHz – 300000000 kHz.
EHF 30000000000 Hz – 300000000000 Hz.
Extremely High Frequency communications stations and ESW emissions.
EHF radio communications stations, Amateur Radio, Satellite radio communications, Radio Astronomy and other UHF radio emissions are here.
Introduction to Extremely High Frequency EHF DX, the hobby of listening to distant Extremely High Frequency EHF Radio Astronomy, radio communications stations, Amateur Radio stations, Utility radio stations, Space radio communications, man made radio emissions and natural radio emissions between 30000 MHz and 300000 MHz (30 GHz – 300 GHz).
EHF contains microwave frequencies in part of the Ka band 26500 MHz – 40000 MHz (26.5 GHz – 40 GHz) and all of the Q band 30000 MHz – 50000 MHz (30 GHz – 50 GHz),
U band 40000 MHz – 60000 MHz (40 GHz – 60 GHz),
V band 50000 MHz – 75000 MHz (50 GHz – 75 GHz),
E band 60000 MHz – 90000 MHz (60 GHz – 90 GHz),
W band 75000 MHz – 110000 MHz (75 GHz – 110 GHz),
F band 90000 MHz – 140000 MHz (90 GHz – 140 GHz),
D band 110000 MHz – 170000 MHz (110 GHz – 170 GHz) and up to 300000 MHz (300 GHz).
Extremely High Frequency (EHF) radio signals have Extremely Short Wave (ESW) lengths.
EHF DX Long distance Extremely High Frequency radio listening.
EHF DX Long distance Extremely High Frequency radio hunting.
EHF DXer Long distance Extremely High Frequency radio listener.
EHF DXing is the searching for long distance Extremely High Frequency radio signals.
EHF 30000 MHz – 300000 MHz (30 GHz – 300 GHz).
Millimetric waves.
The hobby of Listening to EHF radio.
Introduction to EHF radio.
Introduction to Extremely High Frequency radio.
http://en.wikipedia.org/wiki/Extremely_high_frequency
EHF Aeronautical Communications Service frequencies.
EHF Navigation Service frequencies.
EHF Amateur Radio Service frequencies.
EHF Fixed Microwave frequencies.
EHF Fixed Satellite Service frequencies.
EHF Industrial Scientific & Medical frequencies.
EHF Millimeter Wave frequencies.
EHF Mobile Satellite Service frequencies.
EHF Public Mobile Service frequencies.
EHF Private Land Mobile Service frequencies.
Studies on the use of frequency bands above 275 GHz by land-mobile and fixed service applications from 275 GHz to 450 GHz.
EHF Radio Astronomy Service frequencies.
EHF Space Operation and Space Research Service frequencies.
EHF Vehicle Radar Systems frequencies.
http://www.rfcafe.com/references/electrical/rf-freq-allo-us.htm
22.1
Amateur Radio.
EHF Amateur Radio.
Amateur Radio on EHF.
47000 MHz. 47 GHz.
6 millimetre band 47000 MHz EHF.
6 millimeter band 47000 MHz EHF.
6 millimetre band 47 GHz EHF.
6 millimeter band 47 GHz EHF.
https://en.wikipedia.org/wiki/6-millimeter_band
80000 MHz. 80 GHz.
4 millimetre band 80000 MHz EHF.
4 millimeter band 80000 MHz EHF.
4 millimetre band 80 GHz EHF.
4 millimeter band 80 GHz EHF.
https://en.wikipedia.org/wiki/4-millimeter_band
122000 MHz. 122 GHz.
2.5 millimetre band 122000 MHz EHF.
2.5 millimeter band 122000 MHz EHF.
2.5 millimetre band 122 GHz EHF.
2.5 millimeter band 122 GHz EHF.
https://en.wikipedia.org/wiki/2.5-millimeter_band
140000 MHz. 140 GHz.
2 millimetre band 140000 MHz EHF.
2 millimeter band 140000 MHz EHF.
2 millimetre band 140 GHz EHF.
2 millimeter band 140 GHz EHF.
https://en.wikipedia.org/wiki/2-millimeter_band
241000 MHz. 241 GHz.
1 millimetre band 241000 MHz EHF.
1 millimeter band 241000 MHz EHF.
1 millimetre band 241 GHz EHF.
1 millimeter band 241 GHz EHF.
https://en.wikipedia.org/wiki/1-millimeter_band
Amateur Radio from 275 GHz to 30000 GHz
Amateur Radio from 275 GHz to 30 THz.
https://en.wikipedia.org/wiki/Submillimeter_amateur_radio
Amateur Radio Microwave to light waves distance records.
https://www.microwavers.org/index.htm?records.htm
See 23.1 THF Tremendously High Frequencies.
Amateur radio stations are individual citizens in every country of the world who communicate and experiment with radio transmitters and radio receivers. You can hear some amateur radio stations on EHF radio.
The hobby of Listening to EHF amateur radio communications.
The hobby of EHF Ham Radio DX.
The hobby of Long distance EHF amateur radio station listening.
The hobby of Long distance EHF Amateur Radio station transmitting.
Germany.
Amateur Radio above 275 GHz in Germany..
http://www.gesetze-im-internet.de/afuv_2005/anlage_1.html
USA.
EHF Amateur radio in the USA.
USA EHF amateur radio.
EHF Ham radio in the USA.
USA EHF Ham radio.
EHF Amateur radio in the US.
US EHF amateur radio.
EHF Ham radio in the US.
US EHF Ham radio.
Amateur Radio above 275 GHz in the United States.
Amateur stations transmitting in the following segments must not cause harmful interference to radio astronomy stations: 76-81 GHz, 136-141 GHz, 241-248 GHz, 275-323 GHz, 327-371 GHz, 388-424 GHz, 426-442 GHz, 453-510 GHz, 623-711 GHz, 795-909 GHz, or 926-945 GHz. In addition, amateur stations transmitting in the following segments must not cause harmful interference to stations in the Earth exploration-satellite service (passive) or the space research service (passive): 275-286 GHz, 296-306 GHz, 313-356 GHz, 361-365 GHz, 369-392 GHz, 397-399 GHz, 409-411 GHz, 416-434 GHz, 439-467 GHz, 477-502 GHz, 523-527 GHz, 538-581 GHz, 611-630 GHz, 634-654 GHz, 657-692 GHz, 713-718 GHz, 729-733 GHz, 750-754 GHz, 771-776 GHz, 823-846 GHz, 850-854 GHz, 857-862 GHz, 866-882 GHz, 905-928 GHz, 951-956 GHz, 968-973 GHz and 985-990 GHz.
http://www.arrl.org/frequency-allocations https://www.ecfr.gov/cgi-bin/text-idx?SID=5279d74e788dbc8b386756ce377bf4df&mc=true&node=pt47.5.97&rgn=div5#se47.5.97_1301
Amateur Radio on 241 GHz in the USA.
http://www.mgef.org/zms_241_2.htm
Amateur Radio on 241 GHz and 322 GHz in the USA.
http://www.mgef.org/zms_241.htm
Amateur Radio on 403 GHz in the USA.
http://www.mgef.org/zms_403_2.htm
Amateur Radio on 411 GHz in the USA.
http://www.mgef.org/zms_403.htm
United Kingdom.
EHF Amateur radio in the UK.
UK EHF amateur radio.
EHF Ham radio in the UK.
UK EHF Ham radio.
EHF Amateur radio in the United Kingdom.
United Kingdom EHF amateur radio.
EHF Ham radio in the United Kingdom.
United Kingdom EHF Ham radio.
Amateur Radio from 275 GHz to 3000 GHz in the United Kingdom.
In the UK there are no regulations for frequencies above 3000 GHz 3 THz.
https://rsgb.org/main/operating/band-plans/microwaves/terahertz/
Video: UK 288 GHz Experiments by Roger G8CUB.
https://www.youtube.com/watch?v=9GkWNWf-x24
Video First UK 288GHz radio contact.
https://www.youtube.com/watch?v=Yw8hzjV5mC0
22.2
Cosmic Microwave Background Radiation from outer space.
Cosmic Microwave Background Radiation on EHF.
EHF Cosmic Microwave Background Radiation.
EHF CMBR.
This is the hobby of listening to radio signals that have travelled for more than 13 billion light years since the creation of the Universe.
Free computer software can be downloaded to help listeners enjoy this experience.
The Cosmic Microwave Background Radiation CMBR caused by the creation of the Universe (“Big bang”) was first heard on UHF radio.
The strength of the CMBR peaks to its highest level on the Extremely High Frequency 279.5 GHz (279500 MHz).
http://science.hq.nasa.gov/kids/imagers/ems/micro.html
http://www.setileague.org/askdr/planck.htm
http://www.setileague.org/askdr/backgrnd.htm
See 21.2 (SHF Cosmic Microwave Background Radiation from outer space).
22.3
Experimental Radio.
Extremely High Frequency experimental radio.
EHF experimental radio.
Extremely High Frequency (Ehf) experimental radio (er).
Ehfer.
EhFER.
Includes legal no-license-needed EHF Experimental Radio Transmitters.
The hobby of listening to extremely high frequency very low power (micro) radio beacons including the Industrial, Scientific and Medical (ISM) bands of:
61000 MHz – 61500 MHz centered on 61250 MHz in the 5 millimeter (5 millimeter) band,
122000 MHz – 123000 MHz centered on 122500 MHz in the 2.4 millimetre (2.4 millimeter) band,
244000 MHz – 246000 MHz centred on 245000 MHz in the 1.2 millimetre (1.2 millimeter) band.
Extremely High Frequency EHF radio listeners can use free to download computer software to see on their computer very low power radio signals over large distances as well as radio signals under the noise.
Australia.
EHF Experimental Radio in Australia.
Extremely High Frequency Experimental Radio in Australia.
Ehfer in Australia.
EhFER in Australia.
The hobby of listening to low power radio signals in Australia.
Free software can be downloaded from the Internet to listen for low power radio signals under the noise.
As you do with the Sun protect the eye and the human body by never looking into or standing in front of a dish antenna or any other microwave antenna.
No radio transmitter licence (license) is needed in Australia on the following EHF bands (see conditions below).
Ehfer bands in megahertz.
57000 MHz – 66000 MHz (57 GHz – 66 GHz, 57000000 kHz – 66000000 kHz),
59000 MHz – 63000 MHz (59 GHz – 63 GHz, 59000000 kHz – 63000000 kHz).
EHF Bands where no radio transmitter licence (license) is needed in Australia (see conditions below).
57 GHz – 66 GHz 5 mm band (“60ger”, “60giger”, 60 GHz Experimental Radio, 60000 MHz Experimental Radio)
59 GHz – 63 GHz 5 mm band (“60ger”, “60giger”, 60 GHz Experimental Radio, 60000 MHz Experimental Radio)
In the EHF bands where no transmitter licence (license) is needed the maximum radiated antenna power is shown for each band:
“60ger” 5 mm band 57 GHz – 66 GHz using a transmitter with maximum power of 20 mW or less and maximum antenna radiated power of 20 Watts e.i.r.p. with Data communications transmitters for use indoors only. Be aware of the extreme danger to the human body on these microwave frequencies. As you do with the Sun protect the eye and the human body by never looking into or standing in front of a dish antenna or any other microwave antenna.
“60ger” 5 mm band 59 GHz – 63 GHz using a transmitter with maximum power of 25 mW or less and maximum antenna radiated power of 150 Watts e.i.r.p. with Data communications transmitters for use outdoors only and in land or marine deployment. Be aware of the extreme danger to the human body on these microwave frequencies. As you do with the Sun protect the eye and the human body by never looking into or standing in front of a dish antenna or any other microwave antenna.
The Australian Radio communications (Low Interference Potential Devices LIPD class license 2000) with all amendments came into effect on 1 July 2009.
This document (LIPD 2000) includes the amendments to 2009 to allow devises that meet certain power levels on certain frequencies to be used without the need to apply for a license.
LIPD, (section 3, Note) states that LIPD devises must not cause radio frequency interference to other Radio communication devises.
The responsibility is on LIPD owners to resolve interference for example by retuning or stopping their operation.
Radio communications (Low Interference Potential Devices) Class Licence 2000, 1 July 2009, Schedule 1Transmitters.
The Australian Communications and Media Authority ACMA (Low Interference Potential Devices LIPD) pdf.
New Zealand.
EHF Experimental Radio in New Zealand.
Extremely High Frequency Experimental Radio in New Zealand.
Ehfer in New Zealand.
EhFER in New Zealand.
The hobby of listening to low power radio signals in New Zealand.
Free software can be downloaded from the Internet to listen for low power radio signals under the noise.
No radio transmitter licence (license) is needed in New Zealand on the following UHF bands (see conditions below).
Ehfer bands in megahertz, gigahertz and kilohertz.
57000 MHz – 64000 MHz (57 GHz – 64 GHz, 57000000 kHz – 64000000 kHz).
122000 MHz – 123000 MHz (122 GHz – 123 GHz, 122000000 kHz – 123000000 kHz).
244000 MHz – 246000 MHz (244 GHz – 246 GHz, 244000000 kHz – 246000000 kHz).
EHF Bands where no radio transmitter licence (license) is needed in New Zealand (see conditions below).
57 GHz – 64 GHz 5 mm band (“60ger”, “60giger”, 60 GHz Experimental Radio, 60000 MHz Experimental Radio).
122 GHz – 123 GHz 2.4 mm band (“123ger”, “123giger”, 123 GHz Experimental Radio, 1230000 MHz Experimental Radio).
244 GHz – 246 GHz 1.2 mm band (“246ger”, “246giger”, 246 GHz Experimental Radio, 2460000 MHz Experimental Radio).
In the EHF bands where no transmitter licence (license) is needed the maximum radiated antenna power is shown for each band:
“60ger” 5 mm band 57 GHz – 64 GHz using maximum peak power of 20 Watt e.i.r.p. for fixed point-to-point links. This power of 20 Watt e.i.r.p. is made mainly from the gain of the antenna. The peak total transmitter power shall not exceed 500 mW.
“123ger” 2.4 mm band 122 GHz – 123 GHz using maximum peak power of 1 Watt e.i.r.p.
“246ger” 1.2 mm band 244 GHz – 246 GHz using maximum peak power of 1 Watt e.i.r.p.
See the updated New Zealand regulations updated in 2020 here
Radio communications regulations (General user radio license for short range devices). Notice 2020 from 0 to 246 GHz.
https://gazette.govt.nz/notice/id/2020-go5045
USA.
EHF Experimental Radio in the USA.
EHF Experimental Radio in the US.
Extremely High Frequency Experimental Radio in the USA.
Extremely High Frequency Experimental Radio in the US.
Ehfer in the USA.
Ehfer in the US.
EhFER in the USA.
EhFER in the US.
As you do with the Sun protect the eye and the human body by never looking into or standing in front of a dish antenna or any other microwave antenna.
No radio transmitter licence (license) is needed in the USA on the following EHF bands (see conditions below).
Ehfer bands in megahertz.
92000 MHz – 95000 MHz (92 GHz – 95 GHz, 92000000 kHz – 95000000 kHz)
UHF Bands where no radio transmitter licence (license) is needed in the USA (see conditions below).
92 GHz – 95 GHz 3.2 mm band (93ger, “93giger” 93 MHz Experimental Radio 92000 MHz Experimental Radio).
In the UHF bands where no transmitter licence (license) is needed the maximum radiated antenna power or field strength is shown for each band:
“93giger” 3.2 mm band 92 GHz – 95 GHz using a maximum of 20.4 Watts e.i.r.p. measured 3 meters away from the antenna. This is a power density of 60 µW per centimeter squared (60 µW per centimetre squared). The operation of this devise can be for any purpose where the transmitter is part of a fixed indoor infrastructure involving connection to AC power. An external antenna is not allowed. The signal must not be intentionally directed outside through a window or doorway. Attached to the devise should be a sign “this equipment can only be operated indoors. Operation outdoors is a violation of 47 U.S.C. 301 and could subject the operator to serious legal penalties.
The FCC Federal Communications Commission 10 July 2008 radio regulations, Part 15 rules for Radio Frequency devices outlines the USA radio regulations under which an intended radiator of radio waves may be operated without a license.
Unlicensed transmitters (intended radiators) must not cause interference to other radio or TV stations. Unlicensed radio stations (intended radiators) are not protected from interference.
Part 15 rules, page 13, section 15.23 allow home built transmitters (Intentional radiators).
Home-built Ehfer transmitter radio regulations for Part 15 compliant devices.
Home built Ehfer transmitters.
Home built Ehfer radio transmitters.
Home constructed Ehfer radio transmitters.
Home-made EHF radio transmitters.
Home made EHF radio transmitter.
Home-made EHF radio transmitter.
Home-made EHF transmitter.
Home built radio transmitters.
Home built radio transmitter.
Home constructed radio transmitters.
Home constructed radio transmitter.
Home made radio transmitters.
Home made radio transmitter.
The FCC Part 15 radio regulations for home-made radio transmitter devices.
FCC 10 July 2008 Part 15 radio regulations, page 13, section 15.23 “Home-built devices” states:
(a) Equipment authorization is not required for devices that are not marketed, are not constructed from a kit and are built in quantities of 5 or less for personal use.
(b) It is recognized that the individual builder of Home-built equipment may not possess the means to perform the measurements for determining compliance with the regulations. In this case the builder is expected to employ good engineering practices to meet specified technical standards to the greatest extent practicable.
Section 15.5 also applies to home made devices (transmitters).
Page 9, Section 15.5 “General conditions of operation”.
(a). No person has a right to the continued use of current frequencies (this means that any frequency might be re-allocated for a different use in future).
(b). No harmful radio or TV interference is to be caused and interference from licensed or unlicensed stations must be accepted.
(c). Operation of the devise (transmitter) must cease if an FCC representative informs you of harmful interference caused by your devise. Operation can only restart once the cause of the interference has been corrected.
(d). Transmitters causing damped wave are prohibited (not allowed).
Part 15 rules, page 80 is the list of frequencies where intended radio emissions (transmissions) is not permitted. Only spurious emission (such as unavoidable low level harmonic radiation as a result of transmitting on another frequency) is allowed in those restricted bands.
The FCC part 15 radio regulations in the USA updated 29 January 2021.
22.4
Military radio.
EHF military radio stations.
Military radio on EHF.
The hobby of listening to military radio stations on EHF radio.
The hobby of Listening to EHF military radio stations.
The USA military are waiting for the completion of a new EHF military satellite radio communications system.
The hobby of Listening to Army, Navy and Air Force communications on EHF radio.
United States Space Force.
https://www.spaceforce.mil/About-Us/Fact-Sheets/
https://en.wikipedia.org/wiki/Advanced_Extremely_High_Frequency
22.5
Radar.
EHF radar.
Radar on EHF.
The hobby of listening to radar signals.
https://earth.esa.int/documents/10174/2052852/c3_electromagnetic_full.jpg
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4883441/
Australia.
EHF Radar in Australia.
Australian radar on EHF.
The hobby of Listening to radar signals in Australia.
Australian Radio Frequency spectrum plan 2017.
https://www.legislation.gov.au/Details/F2016L02001
Australian Radiofrequency Spectrum Allocations chart 2017.
Canada.
Radar in Canada.
Canadian radar on EHF.
Canada radar on EHF.
The hobby of Listening to radar signals in Canada.
94000 MHz (94 GHz).
Radar systems on 94 GHz are covered in Canada by Radio Regulations RSS-210 – “Low-power licence-exempt radio communication devices” if the maximum power is 0.4 Watts e.i.r.p. These are approved on a case by case basis.
As you do with the Sun protect the eye and the human body by never looking into or standing in front of a radar antenna or any other microwave antenna.
New Zealand.
The hobby of listening to radar signals in New Zealand.
46700 MHz – 46900 MHz (46.7 GHz – 46.9 GHz, 46700000 kHz – 46900000 kHz).
76000 MHz – 77000 MHz (76 GHz – 77 GHz, 76000000 kHz – 77000000 kHz).
In the EHF bands where no transmitter licence (license) is needed the maximum radiated antenna power or field strength for radar is shown for each band:
46.7 GHz – 46.9 GHz using 100 mW e.i.r.p. for Field Disturbance Sensors.
76 GHz – 77 GHz using 1 Watt e.i.r.p. for Field Disturbance Sensors.
USA.
Radar in the USA.
USA radar on EHF.
Radar in the US.
US radar on EHF.
The hobby of listening to radar signals in the USA.
46700 MHz – 46900 MHz (46.7 GHz – 46.9 GHz, 46700000 kHz – 46900000 kHz).
57000 MHz – 64000 MHz (57 GHz – 64 GHz, 57000000 kHz – 64000000 kHz).
76000 MHz – 77000 MHz (76 GHz – 77 GHz, 76000000 kHz – 77000000 kHz).
92000 MHz – 95000 MHz (92 GHz – 95 GHz, 92000000 kHz – 95000000 kHz)
Radar systems used as vehicle mounted radar sensors is covered in the USA FCC part 15 radio regulations for low power no-license-required devices and include:
46.7 GHz – 46.9 GHz using the power levels below,
76 GHz – 77 GHz using the power levels below.
Vehicle not in motion 230 mW e.i.r.p. This is a power density of 200 nW per centimeter squared (200 nW per centimetre squared).
Vehicle in motion, radar forward looking 67.9 Watts e.i.r.p. This is a power density of 60 µW per centimeter squared (60 µW per centimetre squared).
Vehicle in motion, radar side or rear looking 33.9 Watts e.i.r.p. This is a power density of 30 µW per centimeter squared (30 µW per centimetre squared).
Radar not on a vehicle, Radar for fixed location, Radar for fixed equipment (not on a vehicle) are covered in the USA FCC part 15 radio regulations for low power no-license-required devices and include:
57 GHz – 64 GHz using a peak power maximum of 20.4 mW e.i.r.p. This is a peak power density of 18 µW per centimeter squared (18 µW per centimetre squared).
Radar for indoor use only and any other indoor purpose where the transmitter is part of a fixed indoor infrastructure involving connection to AC power can use 92 GHz – 95 GHz. External antenna is not allowed. The signal must not be intentionally directed outside through a window or doorway. Attached should be a sign “this equipment can only be operated indoors. Operation outdoors is a violation of 47 U.S.C. 301 and could subject the operator to serious legal penalties.
92 GHz – 95 GHz for any indoor use including radar is limited to a maximum 20.4 Watts e.i.r.p. This is a power density of 60 µW per centimeter squared (60 µW per centimetre squared).
22.6
Radio Astronomy.
Radio Astronomy on EHF.
EHF Radio Astronomy.
The hobby of Listening to EHF radio signals from outer space.
The hobby of Listening to EHF radio signals from space satellites.
The hobby of Listening to EHF space radio communication.
The hobby of Listening to EHF radio emissions from the Universe.
https://www.jive.eu/jivewiki/lib/exe/fetch.php?media=evnnews:evn_newsletter55.pdf
https://www.itu.int/dms_pub/itu-r/opb/hdb/R-HDB-22-2013-PDF-E.pdf
https://www.spaceacademy.net.au/env/sol/solradp/solradp.htm
A hobby in Radio Astronomy can lead to a career in Radio Astronomy.
John Paul Wild heard radio waves from the Sun in 1952.
http://www.abc.net.au/science/features/listen_sun/default.htm
Australia.
Radio Astronomy in Australia.
Australian Radio Astronomy.
Australia Radio Astronomy.
Coonabarabran, Australia.
Mopra Observatory, Warrumbungle Mountains near Coonabarabran, N.S.W., Australia.
Mopra Observatory is a single 22 metre radio telescope designed for the EHF 3 millimetre band (3 mm) 76 GHz to 117 GHz.
Mopra Observatory is used as part of the Australia Long Baseline Array of radio telescopes.
Mopra Observatory is also used on its own to monitor radio signals in the millimeter band (EHF).
Mopra radio telescope covers 3 radio bands between 16 GHz to 117 GHz in the SHF and EHF bands:
12 mm band from 16 GHz – 27 GHz (SHF band),
7 mm band from 30 GHz to 50 GHz (EHF band) and the
3 mm band from 76 GHz – 117 GHz (EHF band).
http://www.narrabri.atnf.csiro.au/mopra
http://www.narrabri.atnf.csiro.au/mopra/obsinfo.html
Narrabri, Australia.
Paul Wild Observatory, Narrabri, N.S.W., Australia.
The Australia Telescope Compact Array has six 22 metre antennas which receive signals from Outer Space.
The Paul Wild radio telescopes receive radio waves from outer space in UHF, SHF and EHF bands.
The Paul Wild radio telescopes often use these frequencies to receive radio waves from outer space:
20 cm band on 1750 MHz (1500 MHz – 2000 MHz UHF band),
13 cm band on 2450 MHz (2200 MHz – 2700 MHz UHF band with small narrow band interference on 2493 MHz from Globalstar satellite mobile phones),
6 cm band 5500 MHz (4476 MHz – 6524 MHz SHF band),
3 cm band 9000 MHz (7976 MHz – 10024 MHz SHF band),
12 mm band 17000 MHz (15976 MHz – 18024 MHz SHF band),
12 mm band 19000 MHz (17976 MHz – 20024 MHz SHF band),
7 mm band 33000 MHz (31976 MHz – 34024 MHz EHF band),
7 mm band 35000 MHz (33976 MHz – 36024 MHz EHF band),
7 mm band 43000 MHz (41976 MHz – 34024 MHz EHF band),
7 mm band 45000 MHz (43976 MHz – 36024 MHz EHF band),
7 mm band 93000 MHz (91976 MHz – 94024 MHz EHF band),
http://www.narrabri.atnf.csiro.au
http://www.narrabri.atnf.csiro.au/observing/recfreq.html
22.7
Satellites.
EHF Satellites.
Satellites on EHF.
The hobby of listening to orbiting space satellites on EHF radio.
https://www.northropgrumman.com/space/advanced-ehf-payloads/
https://ui.adsabs.harvard.edu/abs/1989cfin.rept..349A/abstract
http://www.dd1us.de/historical%20sounds%20from%20space.html
https://www.rand.org/content/dam/rand/pubs/reports/2006/R2275.pdf
Amateur Radio Satellites.
Amateur Radio Satellites on EHF.
EHF Amateur Radio satellite frequency bands.
EHF Amateur Radio satellite frequencies.
Amateur Radio Satellite Service frequency allocations on EHF.
47.00 – 47.20 GHz 6 millimetres amateur radio satellite band (6 millimeter bands) 47000 – 47200 MHz.
76 – 81 GHz 4 millimetres amateur radio satellite band (4 millimeter bands) 76000 – 81000 MHz.
122.25 – 123 GHz 2.4 millimetres amateur radio satellite band (2.4 millimeter bands) 122250 – 123000 MHz.
134 – 141 GHz 2.1 millimetres amateur radio satellite band (2.1 millimeter bands) 134000 – 141000 MHz.
241 – 250 GHz 1.2 millimetres amateur radio satellite band (1.2 millimeter bands) 241000 – 250000 MHz.
https://hackaday.com/2019/01/07/all-about-ham-satellites/
Military satellite communications.
Military satellite communications on EHF.
Military messages using the NATO STANAG 4406 Annex E is the family of protocols to support military messaging based on the ITU X.400 Standards.
Satellite to HF radio Naval Surface Fleet Communications.
Communication on VLF by EMCOM (when submarines can receive but not sent signals).
Army deployment in the field using HF radio.
Special Forces in the field using satellite EMCOM (where personal are radio silent but need to receive messages).
https://fas.org/irp/doddir/army/atp6-02-54.pdf
https://iopscience.iop.org/article/10.1088/1742-6596/1575/1/012046/pdf
https://apps.dtic.mil/dtic/tr/fulltext/u2/a187005.pdf
https://space.skyrocket.de/doc_sdat/aehf-1.htm
http://www.astronautix.com/a/aehf.html
https://www.secnav.navy.mil/rda/Pages/Programs/NMT.aspx
http://www.milsatmagazine.com/story.php?number=541872357
https://spaceflightnow.com/atlas/av019/aehf.html
https://www.popularmechanics.com/military/research/a18194748/aehf-doomsday-satellites/
Earth to Mars communications.
https://marspedia.org/Interplanetary_communications
See 5.3a – 5.3d (Satellite radio broadcasting).
See 6.7 (Satellite TV broadcasting).
See 18.16 (HF Satellites).
See 19.13 (VHF Satellites).
See 20.15 (UHF Satellites).
See 21.10 (SHF Satellites).
See 23.2 (THF Satellites, Earth and space exploration).
See 24 – 29.
How to build a radio station in Somalia.
How to build a radio station antenna in Somalia.
The antenna is being positioned to attach to the vertical pipe on the top of the tower in Galkayo, North East Somalia.
In August 1994 a Somalia family walk along the Galkayo to Bosasso Highway passing the front of the Galkayo Police station during the mounting of the short wave radio antenna at Radio Free Somalia (“Free for all to use” known later as Radio Galkayo).
Notice that the front wall of the Police station was just rebuilt and has no sign. A later photo shows this same wall shortly after with a painted sign.
North East Somalia became the Puntland State of Somalia on the 1st August 1998.
(Photo Sam Voron 6O0A, VK2BVS, directing the lifting operations from the ground Abdikarim Nur Mohamud 6O0W).
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Contact: Sam Voron VK2BVS, 6O0A.
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