MESSENGER Crustal Magnetic Field and Dipole Maps Derived PDS Archive Bundle LID = urn:nasa:pds:mess-mag-crustal-field-map Bundle Description ================== Overview -------- This bundle contains crustal magnetic field maps and equivalent source dipole arrays for Mercury based on the MESSENGER magnetic field data. This work was funded by a 2016 NASA ROSES DDAP proposal. Grant number NNH16ZDA001N-DDAP. Version History --------------- Bundle Version Description ------- --------------- 1.0 Initial release Related Data Sets ================= The MESSENGER MAG and EPPS data sets contain information relevant to these maps. Bundle Contents =============== Collections ----------- This bundle includes a data collection and a browse collection. The data collection consists of two ASCII data files (Bm_output_0E360E.tab and dipoles_0E360E.tab). The file Bm_output_0E360E.tab is the actual map of the vector field components at a constant altitude of 40 km extending from 35N to 75N latitude and covering all longitudes. The file dipoles_0E360E.tab describes an array of vertically oriented magnetic dipoles at 1 degree resolution in latitude and 2 degrees resolution in longitude located at a depth of 20 km below the mean Mercury surface. The dipoles can be used by any suitably experienced person to calculate the field at any constant altitude. The browse collection consists of two PDF files (fig_MLA_btot2_90-270E_neumann.pdf and fig_MLA_btot2_270-90E_neumann.pdf). These are PDF images of the 40 km altitude map, superposed onto a map of Mercury's topography derived from MESSENGER Laser Altimeter data (furnished by Greg Neumann). For the field map (Bm_output_0E360E.dat), column 1 is longitude in degrees, column 2 is latitude, column 3 is the field magnitude in nT, column 4 is the radial field component in nT, column 5 is the east component in nT, column 6 is the north component in nT, and column 7 is the altitude in km (40 km). Zero values (mainly found along the map edges) indicate no useful data. The resolution of the map is 1 degree in longitude and 0.5 degrees in latitude. For the dipole array (dipoles_0E360E.dat), column 1 is longitude in degrees, column 2 is latitude, and column 3 is the dipole moment in units of G-km^3. Positive moments indicate outward directed dipole moments; negative moments indicate inward directed moments. Key References ============== The following documents are included in the document collection: Hood, L. L. (2015), Initial mapping of mercury's crustal magnetic field: Relationship to the Caloris impact basin, Geophys. Res. Lett., 42, 10,565-10,572, doi:10.1002/2015GL066451 Hood, L. L. (2016), Magnetic anomalies concentrated near and within Mercury's impact basins: Early mapping and interpretation, J. Geophys. res. planets, 121, 1016-1025, doi:10.1002/2016JE005048. Hood, L. L.; Oliveria, J. S.: Galluzzi, V.; Rothery, D. A., (2018), Investigating Sources of Mercury's crustal Magnetic Field: Further mapping of MESSENGER Magnetometer Data, Journal of Geophysical Research: Planets, 123, 2647-2666, doi:10.1029/2018JE005683 Hood, L. L.; Oliveira, J. S.; Spudis, P. D.; Galluzzi, V., Further Mapping of Mercury's Crustal Magnetic Field Using MESSENGER Magnetometer Data, 2018. This paper was originally published in Mercury: Current and Future Science of the Innermost Planet, Proceedings of the conference held 1-3 May, 2018 in Columbia, Maryland. LPI Contribution No. 2047, 2018, id.6079. (The author retains the Copyright for this paper and it is included in this archive with the author's permission.) Please see the documentation for the MESSENGER MAG and EPPS instrument for additional relevant information. Contacts ======== This volume was produced for the Planetary Data System (PDS) at the Planetary Plasma Interactions (PPI) node at the University of California, Los Angeles (UCLA). The data files were provided by Dr. Lon L. Hood at the Lunar and Planetary Laboratory in Tucson, Arizona. The browse files were produced by Dr. Hood and incorporate maps of Mercury's topography provided by Greg Neumann, based on MESSENGER Laser Altimeter data. For questions or problems regarding this bundle, please contact the PDS Planetary Plasma Interactions Node: Email pds_operator@igpp.ucla.edu For question regarding the data, please contact Dr. Lon Hood: Email lon@lpl.arizona.edu For questions regarding PDS Standards or other archives available from the PDS, please contact PDS Operator at the PDS Engineering Node (at JPL): Email pds_operator@jpl.nasa.gov The PDS assumes no legal liability for errors on this archive. All users are encouraged to verify the correctness of the data prior to submitting any publications or other work based on these data. Please report errors on this archive to the PPI of the PDS through contact information provided above.