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About the Mauna Loa Solar Observatory

The Mauna Loa Solar Observatory (MLSO) occupies part of the NOAA Mauna Loa research site located on the flank of Mauna Loa at an elevation of 3440 meters on the island of Hawaii. It is operated by the High Altitude Observatory, a division of the National Center for Atmospheric Research, which is located in Boulder, Colorado.

The Coronal Veil

3D view of the simulated corona
Wednesday, June 22, 2022

Coronal loops, seen in solar coronal images, are believed to represent emission from magnetic flux tubes with compact cross sections. We examine the 3D structure of plasma above an active region in a radiative magnetohydrodynamic simulation to locate volume counterparts for coronal loops.

Efficient and Automated Inversions of Magnetically-Sensitive Forbidden Coronal Lines: CLEDB - The Coronal Line Emission DataBase Magnetic Field Inversion Algorithm

CLEDB 2-line magnetic inversion algorithm flowchart.
Wednesday, June 22, 2022

Alin Paraschiv and Philip Judge present CLEDB, a single point inversion algorithm for determining magnetic parameters using spectro-polarimetric measurements of emission lines formed in the solar corona.

Optimal spectral lines for measuring chromospheric magnetic fields

The solar spectrum seen at low resolution
Wednesday, June 22, 2022

This paper identifies spectral lines from EUV to infrared wavelengths which are optimally suited to measuring vector magnetic fields as high as possible in the solar atmosphere.

The Molecular Oxygen Density Structure of the Lower Thermosphere as Seen by GOLD and Models

Panels a, b, c, d with blue and red data points
Friday, June 17, 2022

This paper compares new observations from the Global-scale Observations of Limb and Disk (GOLD) mission of molecular oxygen (O2) in the lower thermosphere (130 - 200 km in altitude) to widely used models in the aeronomy community.

ON THE (MIS)INTERPRETATION OF THE SCATTERING POLARIZATION SIGNATURES IN THE CA II 8542 A LINE THROUGH SPECTRAL LINE INVERSIONS

Data points in six panels
Friday, June 17, 2022

Scattering polarization tends to dominate the linear polarization signals of the Ca II 8542 A line in weakly magnetized areas (B ~ 100 G), especially when the observing geometry is close to the limb.

Michael Lewis

Michael operates across HAO supporting staff with their computing needs. He has broad knowledge of Linux, Windows and MacOS hardware and software, with a focus on open source solutions.

Sreelakshmi Jayaraman

Sreelakshmi Jayaraman is a Ph.D. student at the Indian Institute of Geomagnetism, India, under the supervision of Dr. Geeta Vichare. She has been a visiting scholar at the High Altitude Observatory of the National Center for Atmospheric Research since 2020 in collaboration with Dr. Astrid Maute.

Damon Burke

Damon is a cross-discipline engineer in the HAO Instrumentation Group, covering a broad spectrum encompassing electronics and computer interfacing.

Haonan Wu

Haonan Wu is a graduate student in the Department of Physics and Astronomy at Clemson University. His research focuses on the ionosphere-thermosphere interactions during magnetic storm time using numerical models.

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