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• W2281264430 abstract "ELF/VLF radio signals, from approximately 300Hz to30KHz, are commonly used for submarine communications, ionosphericremote sensing, geophysical prospecting, and studies of thenear-Earth space environment. Naturally occurring ELF/VLF emissionscaused by nearly every lightning strike can be detected forthousands of miles and provide an abundance of wave-particleinteraction possibilities in the radiation belts. Any appliedstudies of these events, however, require electromagnetic waves inthe ELF/VLF band to be amplified, captured, analyzed, and stored.Specific studies often require the placement of receivers inextremely remote locations such as Antarctica or the middle of anocean, and are almost always located far away from power sources todecrease noise. These scientific requirements drive the creation ofnew ELF/VLF receiver systems. Two new receiver systems weredesigned for use in terrestrial, typically Antarctic, locations.Both new systems utilize 10-100 times less power than thelowest-power comparable existing ELF/VLF receivers and weredesigned for remote unmanned operation in extreme environmentswithout external power. The so called Penguin system, comprised ofa hybrid microcontroller and FPGA architecture, removes theoverhead of a general purpose CPU to provide the most streamlinedprocessing for data acquisition possible while still maintaining arelatively traditional sampling architecture. The drasticallyreduced architecture of the Penguin system, compared to traditionalreceiver systems, on average consumes less power than a typical LEDindicator lamp while capturing high fidelity ELF/VLF magnetic fieldsnapshots every fifteen minutes. The low power and thermalrequirements of the Penguin system enables low-cost remote studiesof medium to large timescale phenomena such as Chorus and AuroralHiss without the need for local power. The system has been deployedand operated at the United States Amundsen Scott South Pole Stationin Antarctica. A second ELF/VLF receiver architecture, the VLFAdvanced Technology platform, or VAT, removes the typical CPUfrom the sampling and recording loop further reducing powerrequirements and physical system size while gaining the ability torecord continuously. This radically new architecture enables futurescientific studies of the fine structure in time and frequency oflong-term events, such as the onset mechanisms of natural Chorusemissions, due to the extremely low power requirements. The systemarchitecture is also greatly applicable to any continuous timerecording system, including but not limited to acoustic andelectromagnetic arrays for subsurface imaging systems, ionosphericremote sensing, and optical sensors." @default.
• W2281264430 created "2016-06-24" @default.
• W2281264430 creator A5087425607 @default.
• W2281264430 date "2010-01-01" @default.
• W2281264430 modified "2023-09-27" @default.
• W2281264430 title "Autonomous ultra-low power ELF/VLF receiver systems" @default.
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• W2281264430 hasPublicationYear "2010" @default.
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