IERS provides data on Earth rotation, reference systems, and geophysical fluids, with models, standards, and current bulletins.
Solar Dynamics Observatory vs WDC Sunspot Index and Long-term Solar Observations
How do Solar Dynamics Observatory and WDC Sunspot Index and Long-term Solar Observations compare? Here are the facts side by side: pricing, platforms, open-source status and what each one is for.
| Directory detail | Solar Dynamics Observatory | WDC Sunspot Index and Long-term Solar Observations |
|---|---|---|
| What it is | NASA’s Solar Dynamics Observatory provides solar imagery and data from instruments studying the Sun’s atmosphere. | SILSO preserves and distributes the international sunspot number, with current and historical solar observation data. |
| 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 Solar Dynamics Observatory and WDC Sunspot Index and Long-term Solar Observations.
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.



