#gigahertz — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #gigahertz, aggregated by home.social.
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Lasers in Space!
Artemis II is testing an upgraded laser-based communications system called O2O >> Orion Artemis II Optical Communications System designed to send data down to Earth at up to 260 megabits per second.
O2O is about the size of a house cat and it uses more or less standard issue infrared lasers, Erbium-doped fiber amplifiers, and receivers used in the fiber telecom industry. O2O develops approx. one watt of optical power.
Artemis II also uses traditional Microwave tech as its core communications system.
https://www.scientificamerican.com/article/nasas-artemis-ii-laser-communications-system-is-beaming-4k-video-from-the/ #NASA #Communications #Microwave #GigaHertz #OpticalCommunications #Laser #ArtemisII #Space #Moon #MoonMission #Orion #DarkSideoftheMoon -
Lasers in Space!
Artemis II is testing an upgraded laser-based communications system called O2O >> Orion Artemis II Optical Communications System designed to send data down to Earth at up to 260 megabits per second.
O2O is about the size of a house cat and it uses more or less standard issue infrared lasers, Erbium-doped fiber amplifiers, and receivers used in the fiber telecom industry. O2O develops approx. one watt of optical power.
Artemis II also uses traditional Microwave tech as its core communications system.
https://www.scientificamerican.com/article/nasas-artemis-ii-laser-communications-system-is-beaming-4k-video-from-the/ #NASA #Communications #Microwave #GigaHertz #OpticalCommunications #Laser #ArtemisII #Space #Moon #MoonMission #Orion #DarkSideoftheMoon -
Lasers in Space!
Artemis II is testing an upgraded laser-based communications system called O2O >> Orion Artemis II Optical Communications System designed to send data down to Earth at up to 260 megabits per second.
O2O is about the size of a house cat and it uses more or less standard issue infrared lasers, Erbium-doped fiber amplifiers, and receivers used in the fiber telecom industry. O2O develops approx. one watt of optical power.
Artemis II also uses traditional Microwave tech as its core communications system.
https://www.scientificamerican.com/article/nasas-artemis-ii-laser-communications-system-is-beaming-4k-video-from-the/ #NASA #Communications #Microwave #GigaHertz #OpticalCommunications #Laser #ArtemisII #Space #Moon #MoonMission #Orion #DarkSideoftheMoon -
Lasers in Space!
Artemis II is testing an upgraded laser-based communications system called O2O >> Orion Artemis II Optical Communications System designed to send data down to Earth at up to 260 megabits per second.
O2O is about the size of a house cat and it uses more or less standard issue infrared lasers, Erbium-doped fiber amplifiers, and receivers used in the fiber telecom industry. O2O develops approx. one watt of optical power.
Artemis II also uses traditional Microwave tech as its core communications system.
https://www.scientificamerican.com/article/nasas-artemis-ii-laser-communications-system-is-beaming-4k-video-from-the/ #NASA #Communications #Microwave #GigaHertz #OpticalCommunications #Laser #ArtemisII #Space #Moon #MoonMission #Orion #DarkSideoftheMoon -
Lasers in Space!
Artemis II is testing an upgraded laser-based communications system called O2O >> Orion Artemis II Optical Communications System designed to send data down to Earth at up to 260 megabits per second.
O2O is about the size of a house cat and it uses more or less standard issue infrared lasers, Erbium-doped fiber amplifiers, and receivers used in the fiber telecom industry. O2O develops approx. one watt of optical power.
Artemis II also uses traditional Microwave tech as its core communications system.
https://www.scientificamerican.com/article/nasas-artemis-ii-laser-communications-system-is-beaming-4k-video-from-the/ #NASA #Communications #Microwave #GigaHertz #OpticalCommunications #Laser #ArtemisII #Space #Moon #MoonMission #Orion #DarkSideoftheMoon -
Amplitude and phase control in SIW structures by tuning multilayered graphene
The topology of the GHMS…
#NewsBeep #News #Physics #Dynamicrange #Engineering #Gigahertz(GHz) #graphene #Graphenehalfmodesubstrateintegratedwaveguide(GHMSIW) #Graphenemicrowave #HumanitiesandSocialSciences #Materialsscience #multidisciplinary #Nanoscienceandtechnology #Opticsandphotonics #Phasevariation #Quadratureamplitudemodulation(QAM) #Science #Tunablegraphene #UK #UnitedKingdom
https://www.newsbeep.com/uk/244307/ -
https://www.europesays.com/ie/162838/ Amplitude and phase control in SIW structures by tuning multilayered graphene #DynamicRange #Éire #Engineering #Gigahertz(GHz) #Graphene #GrapheneHalfModeSubstrateIntegratedWaveguide(GHMSIW) #GrapheneMicrowave #HumanitiesAndSocialSciences #IE #Ireland #MaterialsScience #multidisciplinary #NanoscienceAndTechnology #OpticsAndPhotonics #PhaseVariation #Physics #QuadratureAmplitudeModulation(QAM) #Science #TunableGraphene
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With our modern #computing technology -- desktop #computers with 8 or more CPU cores, each running at multiple #gigahertz, executing a sum total of many billions of instructions per second, with memory measured in double-digit #gigabytes, blindingly fast main storage from SSDS -- I am always continually amazed that #slow #software even exists.
I'm not talking about something where extended calculations genuinely tie up the processor for an arbitrary length of time. I mean, "this program takes a seeming age just to do X".
I was reminded of this again yesterday. Audacity, the audio-editing program, takes about 10s from clicking the icon to it showing a window (on a Linux x86_64 PC). This isn't opening a project or any data files; it's just to get the program initialized to a state where you can see the UI.
And that's the cache-hot behaviour on this machine, which isn't slow.
What the heck is #Audacity doing in those 10s? If the answer is "loading plugins", I'd again point out that this is sufficient time to load many gigabytes of data from SSD, open and read hundreds of files, , and execute many billions of CPU instructions, with time left over. I don't buy this as a legitimate explanation.
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High-Speed PCB Design Hack Chat with Bil Herd - Join us on Wednesday, September 25 at noon Pacific for the High-Speed PCB Design Hack Chat with Bil ... more: https://hackaday.com/2019/09/23/high-speed-pcb-design-hack-chat-with-bil-herd/ #hackadaycolumns #highfrequency #impedance.pcb #autorouting #thehackchat #gigahertz #bilherd #digital #design #traces #fr4