Soviet space-station sessions (Skylab and Salyut viewings)

During the GRILL FLAME and SUN STREAK years, the Defense Intelligence Agency periodically tasked Fort Meade viewers against Soviet space-program targets. The recurring questions were practical. What was inside a given Soviet space station at a given orbital pass? What were the cosmonauts doing? What was the function of newly photographed structures attached to the outside of a vehicle?

The U.S. own Skylab station, deorbited in 1979, was also used as a training and calibration target. Sessions in the released archive document viewers describing the interior of Skylab while it was still inhabited, then comparing their reports to photographs taken by the Skylab crew. The Salyut sessions ran in parallel against the Soviet equivalents in low Earth orbit, against which the United States did not have crewed photography to compare.

The space-station tasking was useful to program management because it produced ground truth. Skylab's interior was fully documented; viewer accuracy could be measured. The reports the unit produced were not uniformly accurate, but they were not random either. Specific structural features, including the dimensions of certain bays and the orientation of equipment racks, were reportedly described correctly by some viewers across multiple sessions.

Soviet Salyut sessions are harder to evaluate. The Soviet station program was opaque to U.S. intelligence in real time, and the architectural details viewers described could not be checked against any contemporaneous reference. Decades later, after the Soviet space program's records became partly public, some of those session reports have been compared to declassified Soviet documentation. The comparisons are uneven.

The space-station material is one of the more bureaucratically mundane parts of the Stargate archive. The interest is in the methodology: ground-truth calibration against a documented target, applied to an undocumented target on the assumption that the technique generalized.