High Altitude Observatory

HAO's mission is to understand the behavior of the Sun and its impact on the Earth, to support, enhance, and extend the capabilities of the university community and the broader scientific community, nationally and internationally, and to foster the transfer of knowledge and technology. As articulated in its Strategic Plan for 2011–2015, HAO's vision is to: Perform world-leading science to understand fundamentally and with predictive capability the sources and nature of solar and geospace variability; Provide scientific leadership and facilities to serve the wider community in common pursuit of these science objectives, and both support and benefit from the NCAR community; Support the education and training of early-career researchers in solar-terrestrial physics and instrumentation; and Provide advocacy for solar-terrestrial physics, promoting its results, and articulating its societal importance, to the rest of NCAR, the NSF, the university community, and the public. HAO's telescopes are located at its Mauna Loa Solar Observatory, near the summit of that volcano on the big island of Hawaii. NCAR's solar observatory shares space on the campus of NOAA's larger Mauna Loa Observatory. HAO's researchers are based at NCAR headquarters, in Boulder, Colorado. ==Eclipse expeditions ==

1952 - Khartoum, Sudan This was a joint HAO – Naval Research Laboratory expedition, which obtained 50 spectra of the eclipse features of the sun. 1958 – Pukapuka, Cook Islands in the Pacific This was a joint HAO – Sacramento Peak expedition that was unable to obtain a single photo due to rainstorms. 1959 – Fuertaventura, Canary Islands of Spain A joint HAO – Sacramento Peak expedition 1962 – Lae, New Guinea 1963 – Alaska and Canada 1965 – Bellingshausen Island, South Pacific 1966 – Pulacayo, Bolivia 1970 - San Carlos Youtepec, Mexico File:Eclipse_in_1970,_Mexico_(DI00448).jpg|thumb|This photograph of the Sun's outer atmosphere, or corona, was taken by a research team from the National Center for Atmospheric Research's High Altitude Observatory during a total solar eclipse on 7 March 1970. It was taken at an altitude of on a remote mountain site in southern Mexico with a special camera designed by Gordon Newkirk of NCAR. 1972 – Cap Chat, Canada 1973 – Loiengalani, Kenya 1980 – Palem, India HAO in collaboration with Southwestern at Memphis College, Tennessee 1981 – Tarma, Siberia, USSR HAO in collaboration with the Astronomical Council of the Academy of Sciences of the USSR, Moscow 1983 – Tanjung Kodok, Indonesia 1988 - Mindanao, Philippines In Provocation No. 214, Dr. Roberts discusses the High Altitude Observatory (HAO) expedition to the Philippines to observe the eclipse of March 18. HAO expedition staff included Dick Fisher, Kristy Rock, Mike McGrath, and Lee Lacey. 1991 - Mauna Loa, Hawaii HAO in collaboration with Rhodes College, Tennessee 1994 - Putre, Chile 1998 – Curaçao, Dutch Antilles 2012 – Palm Cove, Queensland, Australia 2017 - Preparing for the 2017 Eclipse == History ==

Walter Orr Roberts was a graduate student under Donald Menzel at Harvard, and helped him set up a solar telescope at the Oak Ridge Station of Harvard College Observatory. In 1939, Menzel located a site for a western station in the Colorado mountains. In his unpublished memoirs, Menzel writes: “I returned the following summer, supervised the building of the observatory and an observer’s residence [on the mining property of Climax Molybdenum Company at Climax, Colorado], and started the installation of the equipment. “This branch of the Harvard College Observatory informally opened on 8 September 1940 at Climax, Colorado (elevation 11,520 ft.). Its sole purpose was to study the sun, using the first coronagraph in the western hemisphere.” Walter Roberts and his wife arrived in the summer of 1940, and remained at the observatory for 7 years (throughout WWII and beyond). Menzel continues: “In the summer of 1940, however, Walter and I quickly solved the problems of our coronagraph. After I left, he soon had it working properly. He obtained daily records of the spectrum of the corona, which furnished us with a valuable index of solar activity. At Climax, Walter Roberts quickly proved observationally what most astronomers had previously suspected, that the corona itself rotated with the same period as the solar surface, in something over twenty-five days. He initiated a study of the fine structure of the solar atmosphere, determining the behavior of what he called “spicules,” a phenomenon that I had myself briefly discussed while at Lick Observatory. These studies formed the basis for his doctorate thesis submitted for the degree a year or two later.” Work at the observatory was classified during WWII because of its value in predicting radio disturbances from the study of the corona. "The wartime work of the observatory was done under the auspices of the Navy, although overall direction remained in the hands of Harvard.” Post WWII, The National Bureau of Standards contracted the observatory for reports on solar activity. In 1946, CU Boulder became a joint sponsor with Harvard of the observatory, while the Central Radio Propagation Laboratory (CRPL) of the NSB funded HAO's operational costs. The headquarters of HAO was moved to Boulder in 1947. Private philanthropy provided most of the budget until the Sputnik crisis in 1957, after which federal government funding greatly increased. == Directors ==

The founding director of the High Altitude Observatory was Walter Orr Roberts. The current director is Holly R. Gilbert. A list of all HAO directors since the founding of the observatory is given below. ==See also==