| Sxx = X*X' | Instantaneous Input Auto-Spectrum (Dim: m x m) |
| Syy = Y*Y' | Instantaneous Output Auto-Spectrum (Dim: n x n) |
| Sxy = X*Y' | Instantaneous Cross-Spectrum (Dim: m x n) |
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MIL-STD-810H, Environmental Engineering Considerations and Laboratory Tests
Last Updated 29 Oct 2026
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| Sxx = X*X' | Instantaneous Input Auto-Spectrum (Dim: m x m) |
| Syy = Y*Y' | Instantaneous Output Auto-Spectrum (Dim: n x n) |
| Sxy = X*Y' | Instantaneous Cross-Spectrum (Dim: m x n) |