Observing Systems Capability Analysis and Review Tool
Satellite Programme: Solar-TErrestrial RElations Observatory
Dual-satellite programme for solar process study
NASA programme developed and operated in connection with a wide international scientific community.
The platforms are 3-axes stabilised.
The design life time of the satellites is 2 years.
The satellites are placed in the Earth’s orbit around the Sun, viewing the Sun from changing positions so as to implement stereoscopy.
See detailed description at
Real-time data downlinked to a network of stations coordinated by NASA/GSFC.
Data service provided by NASA/GSFC.
2006 - 2020
Associated satellites and instruments
Note: red tag => no longer operational , green tag => operational , blue tag => planned
Solar-TErrestrial RElations Observatory
STEREO (2 sats)
(2006 - 2020)