GraceSstResidualAnalysis

This program applies the Multi-Resolution Analysis (MRA) using Discrete Wavelet Transform (DWT) to the monthly GRACE SST post-fit residuals. First, the residuals are transferred into wavelet domain by applying an 8 level Daubechies wavelet transform (default). In the next step, detail coefficients are merged into three major groups due to their approximate frequency subbands:

• Low scale details, corresponding to the frequency band above 10 mHz;
• Intermediate scale details, corresponding to the approximate frequency range above 3 mHz up to 10 mHz;
• High scale details, corresponding to the approximate frequency range above 0.5 mHz up to 10 mHz.

In the last step, each group is reconstructed back into time domain.

Name	Type	Annotation
outputfileInstrumentHighScale	filename	High scale details
outputfileInstrumentMidScale	filename	Intermediate scale details
outputfileInstrumentLowScale	filename	Low scale details
inputfileInstrument	filename	GRACE SST Residuals
inputfileWavelet	filename	wavelet coefficients