DFT	Discrete Fourier Transform
DORIS	Doppler Orbitography and Radiopositioning Integrated by Satellite
FBPF	Fourier Band-Pass Filtering
FFT	Fourier Fast Transform
GNSS	Global Navigation Satellite System
GRACE	Gravity Recovery and Climate Experiment
IGN	Institute Geographique National
INA	Institute of Astronomy
INASAN	Russian Academy of Sciences
ITRF	International Terrestrial Reference Frame
JPL	Jet Propulsion Laboratory
LEO	Low Earth Orbit
MSSA	Multi-Channel Singular Spectrum Analysis
PC	Principal Component
PM	Polar Motion
PMX	Polar Motion in X Direction
PMY	Polar Motion in Y Direction
RC	Reconstructed Components
RMS	Root Mean Square
SLR	Satellite Laser Ranging
SSA	Singular Spectrum Analysis
SVD	Singular Value Decomposition
VLBI	Very Long Baseline Interferometry