The approach begins with a detailed specification of the material process cycle including all authorized material locations, possible unauthorized locations, and the procedures for measuring and recording movement between locations. An approach is presented for systematically evaluating the overall anomaly detection and resolution capability of an MC and A system. The ability to make a definitive resolution often depends on the types of measurement data available and on the way records are maintained in the Material control and Accounting (MC and A) system. A new metric is also proposed for quantifying the overall effectiveness of the MC&A = ,ĭiscrepancies in accounting for Special Nuclear Material (SNM) require quick and accurate resolution. A method is described for quantifying the detection capability and resolution effectiveness for each possible error. The analysis proceeds by identifying the types of errors that could logically occur in the measurement and recording system and estimating their frequency. The method begins with a detailed specification of the material process cycle including, all authorized material locations, possible unauthorized locations, and the procedures for measuring and recording movement between locations. A new method is presented for systematically evaluating the overall anomaly detection and resolution capability of an MC&A system. The ability to make a definitive resolution often depends on the types of measurement data available and on the way records are maintained in the Material Control and Accounting (MC&A) system. DOI: 10.1016/j.cageo.2008.02.Discrepancies in accounting for Special Nuclear Material (SNM) require quick and accurate resolution. “FA2BOUG – A FORTRAN 90 code to compute Bouguer gravity anomalies from gridded free-air anomalies: Application to the Atlantic-Mediterranean transition zone”.Computers & Geosciences, Volume 34, Issue 12 (December 2008) pp. EGU General Assembly 2008, Vienna, Austria, April 13-18, 2008. An Earth Gravitational Model to Degree 2160: EGM2008. This gravitational model is complete to spherical harmonic degree and order 2159, and contains additional coefficients extending to degree 2190 and order 2159. EGU General Assembly 2008, Vienna, Austria, April 13-18, 2008). “An Earth Gravitational Model to Degree 2160: EGM2008”. The official Earth Gravitational Model EGM2008 has been publicly released by the National Geospatial-Intelligence Agency (NGA) EGM Development Team (N. Density reduction for Bouguer anomaly : 2,67. The topographic correction is applied up to a distance of 167 km using the 1 arc-minute by 1 arc-minute ETOPO1 Digital Elevation Model. The Bouguer corrections computed at regional scales are obtained using the FA2BOUG code developed by Fullea et al. The regional Free-air and Bouguer gravity anomaly grids (averaged over 2,5 arc-minute by 2,5 arc-minute) are computed at BGI from the EGM2008 spherical harmonic coefficients (Pavlis et al., 2008). Regional grids (averaged over 2,5 arc-minute by 2,5 arc-minute) will be derived from the EGM2008 model (extraction limited to 100°x100°) This page allows you to download regional Free-air and Bouguer gravity anomaly grids derived from the Earth Gravitational Model (EGM2008) released by the National Geospatial-Intelligence Agency (NGA) – See References. Extract regional free-air and Bouguer anomaly
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