Portrait of Juha Vierinen

Juha Vierinen

Space Physics Professor at University of Tromsø, working with radars and space physics. This is my personal home page.

GAMERA simulation showing ring, tail, and field-aligned current paths around Earth

GAMERA Currents

Follow current paths through frozen GAMERA simulation snapshots. Explore the ring and tail regions, R1-like and R2-like paths, and ionospheric field-aligned currents.

Magnetosphere current explorer showing the red Region 1 sheet and green Chapman–Ferraro currents

Magnetosphere Currents

Explore three-dimensional magnetosphere–ionosphere current systems, including Region 1 and Region 2, ring and tail currents, and Chapman–Ferraro shielding.

Screenshot of the MOMAP orienteering map editor

MOMAP

Collaborative browser editor for orienteering maps, field mapping, course setting, and print-ready exports.

Screenshot of the Bella EISCAT magnetic field-line explorer

Bella

Interactive EISCAT magnetic field-line explorer with T96 equatorial mapping.

Screenshot of the Signal Processing Course demonstrations

Signal Processing

Interactive course demonstrations for phasors, multidimensional sinusoids, plane waves, and related concepts.

Screenshot of the 55P/Tempel-Tuttle orbit evolution visualization

55P/Tempel-Tuttle

Interactive WebGL visualization of secular Jupiter perturbations and Poynting-Robertson drag.

Screenshot of the MISA low-elevation radar sweep visualization

MISA Horizon Sweep

Interactive visualization of Millstone Hill's low-elevation radar scan during the 8 April 2024 solar eclipse.

Screenshot of the Cape Cod Bay bolide WebGL visualization

Cape Cod Bay Bolide

WebGL visualization of MIT Haystack multi-static radar plasma measurements, ballistic fit, and strewn-field simulation.

Screenshot of the Radiantviz meteor radiant viewer

Radiantviz

Interactive radiant, velocity, and orbit viewer for PANSY and MAARSY meteor detections.

Screenshot of the Bernstein waves visualization

Bernstein Waves

Interactive magnetic-meridian view of Sanya ISR geometry and field-aligned plasma structure.

Screenshot of the Sanya tri-static meteor head echo WebGL visualization

Sanya Tri-static

WebGL visualization of tri-static meteor head echo trajectories from Sanya, Danzhou, and Wenchang.

Screenshot of the AIDA widefield star calibrator

AIDA

Widefield star calibrator for all-sky imagery and catalog matching.

Screenshot of the MAARSY meteor orbit visualizer

Meteors

Interactive MAARSY meteor orbit visualization and shower filtering.

Screenshot of the ionosonde dashboard

Ionosonde

Live oblique sounding dashboard with station status and ionograms.

Screenshot of the PANSY meteor extension monitor

PANSY

Meteor extension monitor for recent detections and processing status.