Birmingham Solar Oscillations Network
Longest running helioseismology network monitoring solar oscillations since 1976.
The Birmingham Solar Oscillations Network, or BiSON, is made up of six observatories positioned around the globe. These remote stations track low-degree oscillations in the Sun. The project is run by the High Resolution Optical Spectroscopy group within the University of Birmingham’s School of Physics and Astronomy, working alongside Sheffield Hallam University. Funding comes from the Science and Technology Facilities Council (STFC). Since 1976, BiSON has gathered uninterrupted data on solar oscillations, giving it the longest continuous record in helioseismology—spanning three complete solar cycles.
- Established
- 1976
- Number of observatories
- 6
- Current sites
- Mount Wilson Observatory (USA), Las Campanas Observatory (Chile), Observatorio del Teide (Spain), South African Astronomical Observatory (South Africa), OTC Earth Station Carnarvon (Australia), Paul W
- Project head
- Professor Yvonne Elsworth
- Funding body
- Science and Technology Facilities Council (STFC)
- Data coverage
- three solar cycles
Lore & Background
BiSON was established in 1976 with two permanent stations, and additional sites were added over time, culminating with a sixth in 1992. The network operates automated resonant scattering spectrometers housed in astronomical domes or mirror fed systems. The current six remote observatories are located at Mount Wilson Observatory (California, USA), Las Campanas Observatory (Region IV, Chile), Observatorio del Teide (Tenerife, Canary Islands, Spain), South African Astronomical Observatory (Sutherland, South Africa), OTC Earth Station Carnarvon (Carnarvon, WA, Australia), and Paul Wild Observatory (Narrabri, NSW, Australia).
Reader's Guide
BiSON's significance lies in its continuous collection of solar oscillation data since 1976, making it the longest running helioseismology network. This dataset spans three solar cycles, providing a unique long-term record for studying the Sun's internal structure and dynamics. The network is operated by the High Resolution Optical Spectroscopy group at the University of Birmingham in collaboration with Sheffield Hallam University, and is funded by the Science and Technology Facilities Council. The project is headed by Professor Yvonne Elsworth, with academic staff including Professor Bill Chaplin, and research staff specializing in helioseismology and related fields. Technical support is provided by Mr Ian Barnes (electronics) and Mr Barry Jackson (mechanics). The network's six automated observatories are distributed globally to enable continuous monitoring of low-degree solar oscillation modes.
Did You Know?
- BiSON has been collecting data continuously on solar oscillations since 1976.
- It is the longest running helioseismology network, with data covering three solar cycles.
- The network consists of six remote solar observatories located on four continents.
Frequently Asked Questions
What is the Birmingham Solar Oscillations Network (BiSON)?
BiSON is a global array of six remote observatories dedicated to tracking low-degree oscillations in the Sun. It is operated by the High Resolution Optical Spectroscopy group at the University of Birmingham's School of Physics and Astronomy in collaboration with Sheffield Hallam University.
Where are BiSON's six observatory sites located?
The stations are spread across several continents: Mount Wilson Observatory in the USA, Las Campanas Observatory in Chile, Observatorio del Teide in Spain, the South African Astronomical Observatory, the OTC Earth Station at Carnarvon in Australia, and a sixth site completing the ring. This geographic spread allows near-continuous coverage of the Sun.
How long has BiSON been collecting solar oscillation data?
The network has been gathering uninterrupted measurements since 1976, giving it the longest continuous record in all of helioseismology. That span covers three complete solar cycles, a dataset no other project has matched.
Who leads the BiSON project and who provides its funding?
Professor Yvonne Elsworth serves as the project head, overseeing the network's operations and data analysis. Funding is supplied by the UK's Science and Technology Facilities Council (STFC).
Why is BiSON considered important to solar science and astrophotography communities?
Because it offers the most extensive unbroken record of the Sun's internal oscillations, BiSON provides researchers with an unparalleled long-term view of how solar structure and activity evolve. Fans and amateur astrophotographers value it as the benchmark dataset that anchors much of modern helioseismology.
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