- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
Fluctations or oddities in natural and artificial emissions. Thomas Riker's attempt to fool the Cardassians with a fake U.S.S. Defiant warp signature was thwarted when Benjamin Sisko recognized that the phase variance and sub-space harmonics readings were incorrect.