TY - GEN AU - A.R. Lawrence AU - Martin Leutbecher AU - T.N. Palmer BT - ECMWF Technical Memoranda DA - 2007 DO - 10.21957/htk9s246 LA - eng M1 - 517 PB - ECMWF PY - 2007 T2 - ECMWF Technical Memoranda TI - Comparison of Total Energy and Hessian Singular Vectors: Implications for Observation Targeting NOT PUBLISHED UR - https://www.ecmwf.int/node/10665 ER -