A subspace infrared algorithm was a process for analyzing subspace infrared telemetry, received from spatial phenomena such as stellar clusters. The algorithm consisted of four analytical aspects, which could be regarded as four smaller algorithms. Their sequence was: 1. * Zeta particle derivation 2. * Gamma wave frequency 3. * Ion distribution 4. * Flow rate of positrons Starfleet officers had a mnemonic device for remembering the sequence: Z-G-I-F, "Zero-G Is Fun".