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Colloquium: Magnetosphere-ionosphere-thermosphere coupling from the combined AMPERE-SuperDARN perspective - Aug 19, 2026

Colloquium: The improvements to the next-gen TIEGCM - Sep 2, 2026

Latest Research Highlights

SuNeRF-CME: Physics-Informed Neural Radiance Fields for Tomographic Reconstruction of Coronal Mass Ejections

Jun 12, 2026

Coronal mass ejections (CMEs) are large eruptions of plasma from the Sun that can affect space weather near Earth. Coronagraphs observe these eruptions by measuring sunlight scattered by electrons in the solar corona and heliosphere. However, these images are two-dimensional projections of a three-dimensional structure, which makes it difficult to determine the true shape, density, and motion of a CME. We introduce SuNeRF-CME, a new method for reconstructing the three-dimensional plasma structure of CMEs from coronagraph images taken from multiple viewpoints.

Considerations for Calibration of Stokes Polarimeters

Jun 11, 2026

Solar physicists use instruments called polarimeters to measure the polarization of sunlight, which reveals the strength and structure of the Sun's magnetic field. Before a polarimeter can deliver reliable measurements, it must be calibrated by feeding known polarization states into the instrument. Calibration takes time, and telescope time is precious — particularly for solar telescopes, where intense sunlight limits how long calibration optics can safely remain in the beam. This raises a key question: what sequence of calibration measurements yields the most accurate result in a given amount of time?

Large-Scale Traveling Ionospheric Disturbances over the Asian-Pacific Sector During 10-11 May 2024 Geomagnetic Superstorm: Ionosonde Observation and MAGE Simulation

Jun 11, 2026

The large-scale traveling ionospheric disturbances (LSTIDs) over the Asian-Pacific sector during the 10-11 May 2024 superstorm are investigated using ionosonde observation and simulation from a whole geospace model - Multiscale Atmosphere Geospace Environment (MAGE), which fully couples multiple magnetosphere, ionosphere and thermosphere models.

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Latest News

HAO Interim Director, Mike Wiltberger

Feb 5, 2026

We welcome Dr. Mike Wiltberger as HAO Interim Director. His 22 years at HAO, combined with his scientific expertise and inter‑agency experience at NSF, make him exceptionally well prepared for this leadership role.

NASA selects NSF NCAR Heliophysics Mission for Continued Development

Jan 20, 2026

In December 2025, NASA selected the Chromospheric Magnetism Explorer (CMEx) for an extended period of concept development. The $150 million mission would fill a critical solar observational gap, generating information on conditions that lead to solar eruptions, advancing our knowledge of the solar magnetic field, and improving space weather modeling capabilities. It would also be the first Explorer-sized spacecraft mission ever led by NSF NCAR.

July book release: "Physical Foundations of Spectroscopy" by Philip Judge

Jan 14, 2026

"Physical foundations of spectroscopy," by Philip Judge, highlights how spectroscopy is firmly anchored in physical foundations, countering modern trends leading to over-specialization. Published by Oxford University Press as a text in their master series in particle physics, astrophysics and cosmology.

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Postal Address:P.O. Box 3000, Boulder, CO 80307-3000•Shipping Address:3090 Center Green Drive, Boulder, CO 80301

This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.

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