HAO Research Highlights

Stackplot of solar-terrestrial data image
February 11, 2015

Recent work on historical recurrent geomagnetic activity and the peculiarity of the recent solar-cycle minimum, was chosen by the editors of AGU journals for special highlight.

September 5, 2014

New observational work provides more information about the evolution of the Sun's interior and origins of its enigmatic 11(-ish) solar cycle. The research potentially opens the door to improved forecasting of decadal-scale solar variability.

Stokes Polarization
February 5, 2014

The Spectro-Polarimeter aboard the Hinode spacecraft was developed jointly by HAO and the Lockheed Martin Solar and Astrophysics Laboratory. This instrument provides continuous, high resolution, high precision measurements of polarization of the Sun.

September 26, 2013

Liang Zhao has authored an Astrophysical Journal paper titled "Two Novel Parameters to Evaluate the Global Complexity of the Sun’s Magnetic Field and Track the Solar Cycle".

NmF2 climatology for 2007 to 2010 in magnetic latitude bins image
November 2, 2012

Extensive analyses of COSMIC data for 2007–2010 have revealed a number of features concerning seasonal and solar-cycle variation. Low-latitude ionospheric peak density NmF2 was dominated by the semi-annual anomaly, the equatorial anomaly and the annual asymmetry.