@CONFERENCE\{IMM2016-06927, author = "A. A. Nielsen and K. Conradsen and H. Skriver", title = "An omnibus likelihood test statistic and its factorization for change detection in time series of polarimetric {SAR} data", year = "2016", month = "mar", booktitle = "{ESA} Big Data from Space", volume = "", series = "", editor = "", publisher = "", organization = "", address = "Santa Cruz, Tenerife, Spain", url = "http://www2.compute.dtu.dk/pubdb/pubs/6927-full.html", abstract = "Based on an omnibus likelihood ratio test statistic for the equality of several variance-covariance matrices following the complex Wishart distribution with an associated p-value and a factorization of this test statistic, change analysis in a short sequence of multilook, polarimetric {SAR} data in the covariance matrix representation is carried out. The omnibus test statistic and its factorization detect if and when change(s) occur. The technique is demonstrated on airborne {EMISAR} {L-}band data but may be applied to Sentinel-{1,} Cosmo-SkyMed, TerraSAR{-X,} {ALOS} and RadarSat-2 or other dual- and quad/full-pol, and even single-pol data also." }