Identification of the state of a moving object by observation of geophysical fields

Problems of identification of the state of a moving object by observation of the geophysical fields are considered. To correct the errors accumulated in the inertial navigation system of the object, the extremal comparison of the information about the outer geophysical fields with the a priori information about them stored in the onboard computer is used (the correlation-extremal approach). The general principles for investigation of the systems for navigation of moving objects by the outer informational fields are described. A model of navigation by the geophysical field and a method for a priori estimation of the local informativeness of the field are suggested.