skip to main content


Title: Spatial effects of HF multiple scattering in the ionosphere: Experimental observations: MULTIPLE SCATTERING IN THE IONOSPHERE
Award ID(s):
0737625
NSF-PAR ID:
10057016
Author(s) / Creator(s):
;
Date Published:
Journal Name:
Radio Science
Volume:
46
Issue:
4
ISSN:
0048-6604
Page Range / eLocation ID:
n/a to n/a
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. Summary

    The Lyon–Fedder–Mobarry global magnetosphere–ionosphere coupled model LFM-MIX is used to study Sun–Earth interactions by simulating geomagnetic storms. This work focuses on relating the multifidelity output from LFM-MIX to field observations of ionospheric conductance. Given a set of input values and solar wind data, LFM-MIX numerically solves the magnetohydrodynamic equations and outputs a bivariate spatiotemporal field of ionospheric energy and flux. Of particular interest here are LFM-MIX input settings required to match corresponding output with field observations. To estimate these input settings, a multivariate spatiotemporal statistical LFM-MIX emulator is constructed. The statistical emulator leverages the multiple fidelities such that the less computationally demanding yet lower fidelity LFM-MIX is used to provide estimates of the higher fidelity output. The higher fidelity LFM-MIX output is then used for calibration by using additive and non-linear discrepancy functions.

     
    more » « less
  2. We propose a novel algorithm based on the split-step non-paraxial model for different intensity diffraction tomography setups to recover the 3D refractive index distribution of multiple-scattering biological samples.

     
    more » « less