The Kalman-Bucy method is here analized and applied to the solution of a specific filtering problem to increase the signal message/noise ratio. The method is a time domain treatment of a geophysical process classified as stochastic non-stationary. The derivation of the estimator is based on the relationship between the Kalman-Bucy and Wiener approaches for linear systems. In the present work we...

this paper describes the application of approximate methods to invert airborne magnetic data as well as helicopter-borne frequency domain electromagnetic data in order to retrieve a joint model of magnetic susceptibility and electrical resistivity. the study area located in semnan province of iran consists of an arc-shaped porphyry andesite covered by sedimentary units which may have potential ...

Characterization of fractured-bedrock aquifers is one of the most difficult problems in hydrogeology. Successful characterization of aquifers at the site scale requires the effective integration of the three basic tools at our disposal: 1) surface geophysical soundings provide full non-destructive coverage of the aquifer volume but are generally ambiguous in interpretation and fail to identify ...

This paper describes the performance of CMOD5, a new C-band geophysical model function, relating scatterometer backscatter to surface vector wind information over the global oceans. It was derived on the basis of a comparison of scatterometer triplets from the Active Microwave Instrument (AMI) aboard the ERS-2 satellite with collocated ECMWF first-guess winds. In addition, results from recent a...

The Model Coupling Environmental Library (MCEL) was developed to simplify the coupling process for models that exchange data at most every time step. Traditionally, model coupling is performed in three ways: file Input/Output (I/O), subroutinization, or Message Passing Interface (MPI). The traditional way of model coupling is through file I/O as shown by Blain1 and Hodur.2 In this case the mode...

[1] Time-lapse geophysical measurements are widely used to monitor the movement of water and solutes through the subsurface. Yet commonly used deterministic least squares inversions typically suffer from relatively poor mass recovery, spread overestimation, and limited ability to appropriately estimate nonlinear model uncertainty. We describe herein a novel inversion methodology designed to rec...

We study the non-linear dynamics of a Penning trap plasma, including the effect of the finite length and end curvature of the plasma column. A new cylindrical PIC code, called KANDINSKY, has been implemented by using a new interpolation scheme. The principal idea is to calculate the volume of each cell from a particle volume, in the same manner as it is done for the cell charge. With this new m...

Joint inversion of different geophysical datasets is an effective way to eliminate non-uniqueness in geophysical inversion problems. In this paper, we focus on a case study of joint inversion of seismic traveltime and gravity observations. The results are encouraging and we can have confidence that, comparing traveltime tomography alone, joint inversion of seismic traveltime and gravity data im...

Text: The Helmholtz equation is frequently used as f model for sonic inversion for both geophysical and medical applications. In this paper we describe explicitly the use of multi-sources, i.e., the simultaneous 'firing' of all transducers for the case of medical, and all geophones for the case of geophysical inversion, resulting in a novel inversion procedure that enabling the circmumvention o...