Reports & Memoranda
The STR Scientific and Technical Reports document the scientific and technical work undertaken within ESA or on its behalf; they can be interpreted as ESA policy.
The STM Scientific and Technical Memoranda are informal documents in which the opinions and conclusions do not necessarily reflect ESA policy.
The latest in this series may be read online (right) or ordered from Spacebooks Online (via the link on the right). A full listing of the series will be coming soon.