The Feasibility of Detecting Magnetic Storms With Smartphone Technology | Zendy

Sten F. Odenwald | Zendy

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The Feasibility of Detecting Magnetic Storms With Smartphone Technology

Author(s) -

Sten F. Odenwald

Publication year - 2018

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2018.2863949

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

In this paper, recent comparison tests are performed on smartphone magnetometer “apps”with a view toward their suitability for detecting and measuring magnetic storm events. Although the iPhone and Samsung smartphone magnetometer sensors in this study have a nominal sensitivity of ±150 nT, this “digitization”noise level is not a Gaussian process and cannot be further reduced by co-adding more measurements to obtain √N improvements. Moreover, there are a variety of systematic effects including apparently uncontrollable glitches and “dc”baseline changes that have amplitudes of ±2000 nT during long-term measurement operations. These systematic variations appear to mask the detection of all but the strongest geomagnetic storms with K > 8. It is possible that other existing smartphones outside this study have improved magnetic sensors, and that future improvements in sensor design may change these conclusions, so a continued study of this issue is warranted.

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