金刚石计划（俄语：Алмаз，Almaz，字面意思为钻石）是苏联的军事侦查太空站计划，这个计划于1971年至1974年发射了一系列太空站。但为了掩盖其军事目的，这些太空站利用礼炮计划来掩饰。 总共有三艘金刚石空间站发射升空: 礼炮2号、礼炮3号和礼炮5号。该计划也被称为OPS (俄语：ОПС)，是轨道载人站“Orbital Piloted Station”(俄语：Орбитальная Пилотируемая Станция)的简称。

礼炮2号入轨后不久就失败了，礼炮3号和礼炮5号则成功的进行了载人实验。对于礼炮5号，苏联国防部在1978年判断为，在维护上的消耗已经超过了其作为自动侦察卫星所取得的利益。

The Almaz (Russian:Алмаз, "Diamond") program was a highly secretive Soviet military space station program, begun in the early 1960s.

Three crewed military reconnaissance stations were launched between 1973 and 1976: Salyut 2, Salyut 3 and Salyut 5. To cover the military nature of the program the three launched Almaz stations were designated as civilian Salyut space stations. Salyut 2 failed shortly after achieving orbit, but Salyut 3 and Salyut 5 both conducted successful manned testing. Following Salyut 5, the Soviet Ministry of Defence judged in 1978 that the time consumed by station maintenance outweighed the benefits relative to automatic reconnaissance satellites.