TY  - JOUR
A1  - Zhelavskaya, Irina
A1  - Spasojevic, M.
A1  - Shprits, Yuri Y.
A1  - Kurth, William S.
T1  - Automated determination of electron density from electric field measurements on the Van Allen Probes spacecraft
JF  - Journal of geophysical research : Space physics
N2  - We present the Neural-network-based Upper hybrid Resonance Determination (NURD) algorithm for automatic inference of the electron number density from plasma wave measurements made on board NASA's Van Allen Probes mission. A feedforward neural network is developed to determine the upper hybrid resonance frequency, fuhr, from electric field measurements, which is then used to calculate the electron number density. In previous missions, the plasma resonance bands were manually identified, and there have been few attempts to do robust, routine automated detections. We describe the design and implementation of the algorithm and perform an initial analysis of the resulting electron number density distribution obtained by applying NURD to 2.5 years of data collected with the Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) instrumentation suite of the Van Allen Probes mission. Densities obtained by NURD are compared to those obtained by another recently developed automated technique and also to an existing empirical plasmasphere and trough density model.
KW  - Van Allen Probes
KW  - electron number density
KW  - neural networks
Y1  - 2016
U6  - https://doi.org/10.1002/2015JA022132
SN  - 2169-9380
SN  - 2169-9402
VL  - 121
SP  - 4611
EP  - 4625
PB  - American Geophysical Union
CY  - Washington
ER  -