The objective of the proposed research is to develop techniques to enable covert communications, where the aim is to conceal the presence of the transmitter, within the uplink multi-satellite cooperative communications context through improving the uplink low probability of detection (LPD) performance, as well as to develop analyses to quantify the LPD performance. In this context, multiple satellites cooperate to jointly receive uplink transmissions from user terminals. The primary motivation of this research is to expand the techniques for and understanding of covert communications in the context of low Earth orbit communications satellite constellations, where constellations can be dense enough to permit cooperation among satellites to improve the uplink quality, which can then be leveraged to improve the uplink LPD performance.