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Radio Frequency

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About Radio Frequency


Radio frequency is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around twenty thousand times per second to around three hundred billion times per second.

Apple to update iPhone 12 in France over radiation

Apple to update iPhone 12 in France over radiation
Sep 15,2023 7:11 am

... Mr Barrot said that the Radio Frequency regulator (ANFR) would test the new update to check its compliance before iPhone 12 is allowed back on sale in the country...

The radio station giving indigenous people a voice

The radio station giving indigenous people a voice
May 19,2022 4:00 am

... Many residents of Arimae said they d like the government to allocate the station an analogue terrestrial Radio Frequency, so it can be picked up by traditional radios...

CES 2022: Colour changing cars and remotes that eat wi-fi

CES 2022: Colour changing cars and remotes that eat wi-fi
Jan 7,2022 3:36 pm

... Its new version has a tiny antennae that can harvest Radio Frequency signals emitted by wi-fi routers from a distance of up to 40m (131ft), allowing it to charge even when the sun isn t shining...

The country that is Europe's hub for cargo bikes

The country that is Europe's hub for cargo bikes
Dec 10,2021 4:31 am

... The Ono, one of the most advanced heavy-duty cargo bikes available for commercial use, has a weather protected driver s cabin, Radio Frequency identification device (RFID) locks for the vehicle, plus batteries that can be replaced within seconds at exchange stations...

Europe launches second EDRS space laser satellite

Europe launches second EDRS space laser satellite
Feb 16,2020 5:05 am

... Telecoms satellites that rely solely on Radio Frequency transmissions are being left behind by the performance of terrestrial fibre networks...

Brexit: We will not back deal which breaks up UK - Leadsom

Brexit: We will not back deal which breaks up UK - Leadsom
Feb 16,2020 3:23 am

... The system would use either the mobile phone network or Radio Frequency identification to check goods or driver s IDs without them leaving the vehicle, in combination with a trusted trader scheme...

Europe launches second EDRS space laser satellite

Feb 16,2020 3:23 am

The System will now comprise two nodes in the Sky - with a third to follow before 2025

Europe has launched the second satellite in its space laser telecommunications network.

It will use optical beams to pull pictures and data from other spacecraft And Then speed that information to the ground.

EDRS-C, as it is known, was sent into Orbit on Tuesday by an Ariane-5 rocket from the Kourou spaceport in French Guiana .

It joins The First node in The Network , EDRS-A, which was put up in 2016.

That spacecraft was positioned over Central Africa to service Europe.

The new satellite will sit slightly to The East , where it will provide additional capacity.

The European Data Relay System is a Joint Venture between the European Space Agency and aerospace giant Airbus .

It is used predominantly by the European Union 's Sentinel-1 and Sentinel-2 Earth observation spacecraft. These platforms take images of The Planet 's Surface .

Rapid retrieval of space images is important for emergency response

Ordinarily, such satellites would have to wait until they Pass Over a radio receiving dish on the ground before downloading their pictures, which could mean a delay of over an hour as they circle the globe.

But the Sentinels were equipped to connect with the EDRS satellites' 1. 8-gigabit laser links.

The relay platforms Orbit much higher in the Sky - Some 36,000km in Altitude - and always have visibility of a radio antenna on the ground.

The capability has particular relevance in The Realm of Natural Disasters , such as major floods or big earthquakes.

Information about the scale of these emergencies can be put in the hands of first responders much faster than would normally be the case.

"We have demonstrated that it's possible to get a Sentinel image on the ground and ready to use after just 15 Minutes of it being acquired," Magali Vaissiere , the director of telecoms at Esa, told Bbc News .

"The Launch of EDRS-C brings additional capacity to The Network , obviously, but it also provides redundancy, a back-up, which you need in an operational system. "

Between a third and a half of all image data from Sentinels 1 and 2 is now routed through EDRS, and usage is certain to expand with the second node now in Orbit .

EDRS-C undergoing testing during its development

There are plans to use the relay system to regularly pull data to the ground from the European Columbus science laboratory on the space station. Future Earth observation satellites are also actively being planned with EDRS in mind, including the EU's next batch of Sentinels and Airbus 's Pléiades Neo satellites which will take Earth images at 30cm resolution. Airbus says airborne reconnaissance could make use of the laser links, too.

A third node, EDRS-D, should be launched over the Asia-Pacific region before 2025.

Esa wants to see optical technology play a much bigger role in space communications.

Telecoms satellites that rely solely on Radio Frequency transmissions are being Left Behind by The Performance of terrestrial fibre networks.

In Time , this is going to put significant constraints on applications that include TV broadcasting and the services carrying the messages of connected devices (the so-called Internet of Things).

It is why the Space Agency will propose to Europe's research ministers in November that they fund the R& D necessary to break the "bottleneck in the Sky ".

Esa's High Throughput Optical Network (HyDRON) project envisages laser links, not just between satellites but between spacecraft and the ground.

This brings certain challenges, including the issue of How To manage light transmissions through a turbulent - and often cloudy - Atmosphere .

However, if the technologies can be mastered they should permit terabit-per-second connections.

"We have shown with EDRS that we have Some leadership in Europe in these technologies, And One of the strategic lines we have defined for [the ministerial meeting] will be dedicated to optical uses so that we strengthen that leadership," the Esa telecoms director said.

The 3-tonne EDRS-C satellite also hosts a Ka-band Radio Frequency payload for the London-based Avanti telecommunications company.

Avanti calls the payload Hylas-3 and will be using it to deliver broadband and other data services to markets in Europe, the Middle East and Africa .



lasers, earth science, airbus group, space exploration, european space agency, telecommunication

Source of news: bbc.com

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