IERS provides data on Earth rotation, reference systems, and geophysical fluids, with models, standards, and current bulletins.
WDC Sunspot Index and Long-term Solar Observations vs Solar Dynamics Observatory
How do WDC Sunspot Index and Long-term Solar Observations and Solar Dynamics Observatory compare? Here are the facts side by side: pricing, platforms, open-source status and what each one is for.
| Directory detail | WDC Sunspot Index and Long-term Solar Observations | Solar Dynamics Observatory |
|---|---|---|
| What it is | SILSO preserves and distributes the international sunspot number, with current and historical solar observation data. | NASA’s Solar Dynamics Observatory provides solar imagery and data from instruments studying the Sun’s atmosphere. |
| Website | ||
| Type | Website | Website |
| Topic | ||
| Pricing | Not confirmed | Not confirmed |
| Platforms | Web | Web |
| Open source | Not stated | Not stated |
| Language | English | English |
| Alternatives |
Other options to consider
Sites similar to both WDC Sunspot Index and Long-term Solar Observations and Solar Dynamics Observatory.
The Leibniz Institute for Solar Physics data centre stores and manages open solar observations and magnetohydrodynamic simulations.
BASS2000 archives solar observations and lets visitors search data by date.
DARTS is JAXA’s space science data archive, covering fields including astronomy, solar physics, lunar and planetary science, and microgravity.
The Martha’s Vineyard Coastal Observatory shares current conditions and downloadable wave, temperature, pressure, wind, and tide data.
The Moscow center provides data on geomagnetic variations, ionospheric phenomena, solar activity, and cosmic rays.



