CalMagNet – an array of search coil magnetometers monitoring ultra low frequency activity in California
نویسندگان
چکیده
منابع مشابه
Design of an S-band Ultra-low-noise Amplifier with Frequency Band Switching Capability
In this paper, an ultra-low-noise amplifier with frequency band switching capability is designed, simulated and fabricated. The two frequency ranges of this amplifier consist of the 2.4 to 2.5 GHz and 3.1 GHz to 3.15 GHz frequency bands. The designed amplifier has a noise figure of less than 1dB, a minimum gain of 23 dB and a VSWR of less than 2 in the whole frequency band. The design process s...
متن کاملDesign Modification of Rogowski Coil for Current Measurement in Low Frequency
The principle object of this paper is to offer a modified design of Rogowski coil based on its frequency response. The improvement of the integrator circuit for nullifying the phase difference between the waveforms of the measured-current and the corresponding terminal voltage is a further object of this investigation. This paper addresses an accurate, yet more efficient measuring and protect...
متن کاملSystem Noise Analysis of an Ultra Wide Band Aperture Array Element for Low Frequency Radio Astronomy
One of the biggest challenges in radio astronomy for the 21st century is the SKA telescope, the newest radio telescope in the world to be built as a Square Kilometre Array of antennas distributed in hundreds of stations to form an interferometric image of the sky. Below 1 GHz, these stations will be composed of thousands of inexpensive elements in a dense or sparse configuration delivering data...
متن کاملan infinite planar array of rectangular microstrip patch antenna analysis
the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...
15 صفحه اولMonitoring of Regional Low-Flow Frequency Using Artificial Neural Networks
Ecosystem of arid and semiarid regions of the world, much of the country lies in the sensitive and fragile environment Canvases are that factors in the extinction and destruction are easily destroyed in this paper, artificial neural networks (ANNs) are introduced to obtain improved regional low-flow estimates at ungauged sites. A multilayer perceptron (MLP) network is used to identify the funct...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Natural Hazards and Earth System Sciences
سال: 2008
ISSN: 1684-9981
DOI: 10.5194/nhess-8-359-2008