AMMVMD-AWT: Adaptive Geomagnetic Data Denoising for Urban Observatories

Python implementation of Adaptive Multiscale Multivariate Variational Mode Decomposition with Adaptive Wavelet Transform (AMMVMD-AWT) for urban geomagnetic observatory data quality assurance. This package provides enhanced denoising algorithms with baseline-residual processing, improved spectral analysis, and adaptive quality threshold estimation via automated quiet-period identification. Validated on Harbin Observatory data with 85.9% noise reduction while preserving 89% of low-frequency energy.