A diagram showing the orbital configuration of an Almaz radar satellite, a type of Soviet reconnaissance satellite based on the Almaz OPS space stations.
NASA/David Portree
David Portree (March 1995). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20190926081306/https://www.webcitation.org/5il9QixAg?url=http%3A%2F%2Fston.jsc.nasa.gov%2Fcollections%2FTRS%2F_techrep%2FRP1357.pdf">Mir Hardware Heritage</a>. <i>NASA Reference Publication 1357</i>. Archived from <a rel="nofollow" class="external text" href="http://ston.jsc.nasa.gov/collections/TRS/_techrep/RP1357.pdf">the original</a> on <span class="mw-formatted-date" title="2019-09-26">2019-09-26</span>. Retrieved on <span class="mw-formatted-date" title="2006-08-28">2006-08-28</span>.