2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205991Several large-scale gravitational wave (GW) interferometers have achieved long term operation at design sensitivity. Questions arise on how to best combine all available data from detectors of different sensitivities for detection, consistency check or veto, localization and waveform extraction. We show that these problems can be formulated using the singular value decomposition (SVD) method. We present techniques based on the SVD method for (1) detection statistic, (2) stable solutions to waveforms, (3) null-stream construction for an arbitrary number of detectors, and (4) source localization for GWs of unknown waveforms.to appear in IJMPD, 2007, for the ASTROD meeting, July, 2006, Beijing. Minor changes with new references added to sec. 3.1General Relativity and Quantum Cosmologytext