THE WAY OF LINKING OF MAGNETIC FIELDS AT THE HIGHPRECISION HYDROMAGNETIC SURVEYS CARRIED OUT ON WATER AREASV.K. PALAMARCHUK, N.V. GLINSKAYA AND O.N. MISCHENKO
The purpose of this research is to consider various ways of the accounting of variations and linking of results of hydromagnetic survey on water areas providing a high precision of survey. The direct way according to coastal magnetovariational station (MVS) which is capable to consider variations only as a zero approximation is presented. The indirect way carries out coordination of the profile magnetic surveys executed on ordinary (workers) and the intersecting routes where, for increase in accuracy, it is offered to carry out except planned, additional intersecting routes on those points where at this time on coastal MVS extreme values of variations were observed. The gradientometric way by results of gradientometric magnetic survey with two magnetometers restore a magnetic field without variations on a profile and on a difference of observed and restored fields calculate a zero approximation of variations which is used in an indirect way. Linking is offered to be carried out by method of artificial (simulated) secant (intersecting) routes using after the accounting of variations by indirect and gradientometric (direct) ways. Application of these ways allows carrying out sea magnetic survey with a margin error in 1-2 nTl.Summing up the results, it should be noted that the offered way of linking needs to be carried out in the following sequence: 1. Observed data linking realization on ordinary and secant routes, 2. Linking of ordinary and secant routes data on additional intersecting routes, 3. Linking realization along the artificial (simulated) secant (intersecting) routes, 4. Digital model of map creation.Reliability of the offered ways is based on fact that its realization doesnt use the minimization of discrepancies by means of a method of least squares. Therefore, the residual discrepancy serves as criterion of data linking.
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