HAO Research Highlights

Graph depicting the transformation of the PCA basis through a series of carefully chosen rotations
February 25, 2019

We investigate the application of 2-dimensional Principal Component Analysis (2D PCA) to the problem of removal of polarization fringes from spectro-polarimetric data sets.

Graph depicting monthly averaged atomic oxygen profiles
February 25, 2019

Nitric oxide (NO) has long been recognized as one of the most important trace constituents in the middle and upper atmosphere.

Graph depicting TIE-GCM density ratios computed with 2007 CHAMP data
February 25, 2019

The specification and prediction of density changes in the thermosphere is a key challenge for space weather observations and modeling, because it is one result of complex interactions between the Sun and the terrestrial atmosphere, and also because it is of operational importance for tracking ob

Image depicting global tachocline fluid top surface deformations
February 18, 2019

We demonstrate a novel physical mechanism, namely, that a “solar tsunami” occurring in the Sun’s interior shear-fluid layer can trigger new cycle’s magnetic flux emergence at high latitudes, a few weeks after the cessation of old cycle’s flux emergence near the equator.

Graph of raw counts are plotted against wavelength in air for spectral lines
February 1, 2019

We study visible and infrared spectra, from 310 nm to 5 microns, obtained during the 21st August 2017 eclipse. The instruments were situated at Camp Wyoba (altitude 2402 m) on Casper Mountain, WY.