The High Altitude Observatory (HAO), through its collaboration with scientists and scientific organizations around the world is recognized as one of the premier authorities of Sun and Sun-Earth studies.

Tightly integrated activities between HAO's three Scientific Sections and the Instrumentation Group strengthen its core program, and in turn yield a variety of exciting results in the scientific exploration of the Sun and the influences it exerts on the terrestrial atmosphere and climate.

We invite you to browse through these links for more in depth information on each of our scientific sections, the instrumentation group, and the various projects and research underway at the High Altitude Observatory.

	Solar Interior and Variability (SIV)
	THEMES Radiative Processes and Small-scale MHD in the Convection Zone and Photosphere Global MHD of the Solar Interior Extra-solar Stars and Planets PROJECTS Asteroseismology of Sun-like Stars
	Lower Solar Atmosphere (LSA)
	Magnetic Field Observations, Interpretation and Theory Solar Atmospheric Dynamic and Radiative Processes
	Cornal and Heliosphere (C & H)
	Coronal Structure and Dynamics Physics of the Solar Wind
	Atmosphere, Ionosphere & Magnetosphere (AIM)
	The Earth's Upper Atmosphere The Ionosphere, Plasmasphere and Magnetosphere
	Facilities
	Mauna Loa Solar Observatory National Solar Observatory Polar Cap Observatory The Instituto de Astrofísica de Canarias Virtual Solar-Terrestrial Observatory
	Community Support
	Computational Modeling Integrated Community Programs