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SPCA (Spitzer Phase Curve Analysis) analyzes Spitzer/IRAC observations of exoplanets. It implements 2D polynomial, Pixel Level Decorrelation, BiLinearly-Interpolated Sub-pixel Sensitivity mapping, and Gaussian Process decorrelation methods, allowing the user to change techniques by setting a single variable. The code's modular structure enables integration of custom astrophysical models and decorrelation methods. SPCA can reduce and decorrelate multiple datasets with a single command.