Abstract
The space distribution of the magnetic anomaly field for the Pacific Ocean is obtained from data of the satellite MAGSAT. A number of long-wavelength magnetic anomalies of the region are identified. A spectrum analysis of a number of profiles of the anomaly field is performed disclosing typical scales of such anomalies. The wave transform of the anomaly magnetic profiles reveals and explicitly exposes the structure of the considered profile. A schematic complex cross-section is constructed, which demonstrates that the satellite data may be used in the study of the magnetic anomaly.
Highlights
The MAGSAT satellite data are still extensively used in the study of magnetic anomaly fields
Spatial structure (a) of the scalar magnetic anomaly field ∆Ba and (b) of the vertical component ∆Za obtained from the MAGSAT satellite data for the Pacific Ocean. a) Solid lines denote positive values of the anomaly magnetic field, dotted lines show negative values
The results of one-dimensional spectral analysis and the wavelet transform of the magnetic anomaly profiles from the MAGSAT satellite measurements has demonstrated their complex structure in space; several classes of longwavelength anomalies are identified with different spatial dimensions
Summary
The MAGSAT satellite data are still extensively used in the study of magnetic anomaly fields. The data from the satellite MAGSAT were used in constructing a space structure of the magnetic anomaly field for the Pa-. Spatial structure (a) of the scalar magnetic anomaly field ∆Ba and (b) of the vertical component ∆Za obtained from the MAGSAT satellite data for the Pacific Ocean. We have constructed numerical maps of the anomaly magnetic field for the Pacific Ocean region from evening and morning passes separately, as well as from the total information for the scalar field and components. The map was constructed of differences of the scalar value of the anomaly field from the morning and evening passes reflecting an error, which amounted, on the average, to 2 nT. The space structure of the magnetic anomaly field within the Pacific Ocean for the scalar field ∆Ba and for the vertical component ∆Za is shown in fig. The space structure of the magnetic anomaly field within the Pacific Ocean for the scalar field ∆Ba and for the vertical component ∆Za is shown in fig. 1a,b
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