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4 edition of Final report of investigation of source location determination from Magsat magnetic anomalies found in the catalog.

Final report of investigation of source location determination from Magsat magnetic anomalies

Final report of investigation of source location determination from Magsat magnetic anomalies

The Euler method approach (NCC 5-70)

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Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Gravity anomalies,
  • Magnetic anomalies,
  • Magsat satellites,
  • Euler equations of motion,
  • Centroids,
  • Satellite observation

  • Edition Notes

    Other titlesInvestigation of source location determination from Magsat magnetic anomalies., Euler method approach (NCC 5-70)
    Statementprepared by Dhananjay Ravat.
    Series[NASA contractor report] -- NASA-CR-201952., NASA contractor report -- NASA CR-201952.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17572255M
    OCLC/WorldCa39880068

    Other articles where Magnetic anomaly is discussed: paleogeography: Linear magnetic anomalies: Earth’s magnetic field has another important property. Like the Sun’s magnetic field, Earth’s magnetic field periodically “flips,” or reverses polarity—that is, the North and South poles switch places. Fluctuations, or anomalies in the intensity of the magnetic field, occur at the. Icelandic rocks in the database have helped explain the source of unusual magnetic activity in Iceland recorded by both Magsat and German Champ missions. Database records revealed the magnetic shifts in Iceland were caused by ferrobasalts, analogues to Martian rocks.

    The new findings could, for example, be relevant for any future observations of the magnetic anomalies on the Earth and on other planets such as Mars. This is because Mars has no longer a dynamo and thus no source enabling a strong magnetic field originating from the core to be built up such as that on Earth. A spherical harmonic expansion to degree and order 29 is derived using a selected magnetically quiet sample of Magsat data. Global maps representing the contribution due to terms of the expansion above n = 13 at km altitude are compared with previously published residual anomaly maps and shown to be similar, even in polar regions. An expansion with such a high degree and order displays all.

    The MAGSAT position accuracy goals of 60 m radially and m horizontally were achieved for all but the last 3 weeks of Magsat lifetime. This claim is supported by ephemeris overlap statistics and by comparisons with ephemerides computed with an independent orbit program using data from an independent tracking network. Recommendations for magnetic surveys Recommendations for further investigation 5 References Web Sites Marine magnetometer Diver held magnetometer Depressor Maritime archives 6 Project archive 7 Appendix: summary table of literary sources


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Final report of investigation of source location determination from Magsat magnetic anomalies Download PDF EPUB FB2

Final Report of From Investigation Of Source Location Determination Magsat Magnetic Anomalies: The Euler Method Approach (NCC ) prepared by Dhananjay Ravat Department of Geology MS Southern Illinois University at Carbondale Carbondale, IL submitted to Grants Officer. Space Science Directorate Procurement Office, CodeI.

Get this from a library. Final report of investigation of source location determination from Magsat magnetic anomalies: the Euler method approach (NCC ). [Dhananjay Ravat; United States. National Aeronautics and Space Administration.]. FINAL REPORT f A digital data library of MAGSAT data has been created under our prior MAGSAT investigator grant.

This library consists of 1, measurements from the quiet data set, is geographically sorted, and allows rapid analysis and processing of all the quiet magnetic data about any selected location.

K.I. Kis, G. Wittmann, Determination of vertical magnetic anomalies and equivalent layer for the European region from the Magsat measurements, Journal of Applied Geophysics, /S(97), 39, 1, (), ().Cited by: Preliminary MAGSAT scalar magnetic anomaly data of Africa, Europe, and adjacent marine areas were reduced to the pole assuming a constant inducing Earth's magnetic field of 60, nT.

This process leads to a consistent anomaly data set free from marked variations in directional and intensity effects of the Earth's magnetic field over this extensive : W. Hinze, R. Vonfrese, R. Olivier. Magnetic methods are generally used to map the location and size of ferrous objects.

Determination of the applicability of the magnetics method should be done by an experienced engineering geophysicist. Modeling and incorporation of auxiliary information may be.

MagSat (Magnetic Field Satellite) /AEM-3 / Explorer MagSat was a joint NASA and USGS (United States Geological Survey) mission, also known as AEM-3 (Applications Explorer Mission-3) and as Explorer The overall objective was to obtain a first quantitative survey of the Earth's magnetic field (collection of data for improved modeling of the time-varying magnetic field generated within the.

The determination of the local phase (LP) and Local wavenumber (LW) for grid based data have been made easier using the methods reported by [6] and [7].

The local frequency was defined as the rate of change of the local phase (LP) with Depth Estimation and Source Location of Magnetic Anomalies from a Basement Complex Formation.

The main features of the susceptibility anomalies are as follows: (1) Oceanic regions younger than about 80 Ma, except the South Indian Ocean, have almost no significant susceptibility variations; the anomalies are seen mainly in the older regions.

(2) The Circum‐Pacific subduction zones have positive susceptibility anomalies. The incomplete removal of time-varying effects in the Magsat data leads to the necessity of fitting low-order polynomial functions in order to minimize differences between passes. This process makes the estimation of the zero level in the crustal anomaly field very difficult.

Refinements in main field analysis, ring current estimation, and the identification of other time-varying field sources. Earth ud Plane&q Science Letters. 78 () Elsevier Science Publishers B.V. Amsterdam -Printed in The Netherlands Magsat equivalent source anomalies over the southeastern United States: implications for crustal magnetization Michal E.

Ruder and Shelton S. Alexander Deporrtneni of Geosciences, The Pemsylua~lia State Utliversity, Vniuersity Pork, PA (U.S.A.). 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 pro-file. Regional to continental scale magnetic anomaly maps are becoming increasingly available from airborne, shipborne, and terrestrial surveys.

Satellite data are commonly considered to fill the coverage gaps in regional compilations of these near-surface surveys.

For the near-surface Antarctic magnetic anomaly map being produced by the Antarctic Digital Magnetic Anomaly Project (ADMAP). Prior to the launch of Magsat, it was not obvious that a satellite altitude magnetometer mission would record crustal magnetic fields, despite the POGO and COSMOS results.

Subsequent studies, however, soon revealed that Magsat was able to map crustal magnetic anomalies. The magnetic ighanomaly is sandwiched between the owanomaly of the Himalayas in the north and Dharwars in the south.

The magnetic ighanomaly beneath the central Indian Plateau (longitude and latitude is aligned with the MAGSAT path P, P and P /8/. Very long-wavelength magnetic anomalies (> km) have been revealed by near-Earth satellite missions, e.g., MagSat. These magnetic anomalies are. resolution MAGSAT magnetic anomalies were then subject to stabilized geophysical inversion and were transformed into reduced-to-pole magnetic anomalies, effective susceptibility contrasts maps.

IMPLICATIONS FOR THE SOURCES OF MARINE MAGNETIC ANOMALIES DERIVED FROM MAGNETIC LOGGING IN HOLES B AND A1 H.-U. Worm,2,3 V. Böhm,2 and W. Bosum2 ABSTRACT The magnetic fields in the deepest oceanic drill hole, DSDP/ODP Hole B, and in the neighboring Hole A, have been.

Measurement. Magnetic anomalies are generally a small fraction of the magnetic field. The total field ranges f to 65, nanoteslas (nT).

To measure anomalies, magnetometers need a sensitivity of 10 nT or less. There are three main types of magnetometer used to measure magnetic anomalies:: – 77–79 The fluxgate magnetometer was developed during World War II to. MAGSAT MAGNETIC FIELD DATA.

This home page provides listing and plotting of sec. resolution magnetic field vectors from NASA's MAGSAT spacecraft ( km altitude, 90 deg inclination) taken between November 2, and May 6. Given that the magnetic force applied to one magnetic monopole by another magnetic monopole is given by Coulomb's equation, what does the force look like?

Assume that there is a negative magnetic pole, p1 magnetic pole, p2 >and move it to some location (x,y) and measure the.This article is concerned with the localization of ferromagnetic objects on the basis of magnetovision measurement analysis.

In the presented case, the concept of localization is understood as the indication of the x, y, and z coordinates of the magnetic moment of the sought object. Magnetovision measurement provides a much simpler, two-dimensional localization of magnetic anomalies compared.The EMM is an epoch release of the Enhanced Magnetic Model, intended to calculate the magnetic field for both the Earth's internal magnetic field as well as the crustal field.

It extends to degree and orderresolving magnetic anomalies down to 56 km wavelength. It is updated along the same schedule as the standard World Magnetic.