Statistics – Computation
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm21a1988b&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SM21A-1988
Statistics
Computation
[0530] Computational Geophysics / Data Presentation And Visualization, [0644] Electromagnetics / Numerical Methods, [1988] Informatics / Temporal Analysis And Representation, [2721] Magnetospheric Physics / Field-Aligned Currents And Current Systems
Scientific paper
The Heliophysics Data Environment Enhancement program supports efforts to integrate data services for conducting research of solar-terrestrial interactions. MANGO, Magnetogram Analysis for the Network of Geophysical Observatories, is a service that is directed at Heliophysics researchers interested in processing magnetic field data from ground magnetometers. Ground magnetograms are essential for monitoring the response of the magnetosphere to solar wind coupling. For instance, it is difficult to understand how spacecraft particle and field variations fit in context of activity throughout the global magnetospheric system without using ground magnetic field data. The MANGO service package allows one to decompose ground magnetic field variations and estimate the relative contributions from secular, diurnal, ring current, and auroral current systems. The MANGO service package leverages the SPASE metadata registries of the Virtual Magnetospheric Observatory (VMO) to compile a list of available magnetogram data products. Currently, MANGO provides access to over 900 data products from about 350 ground magnetic field stations located around the globe. The VMO SPASE Granule registry contains ~150,000 files that comprise the MANGO relevant data products. And, the VMO Granule registry count is steadily increasing as more data products are described and ingested. Data selection from the distributed network of stations is naturally aided by using a world map to display the set of observatories. The MANGO web site (http://mango.igpp.ucla.edu), plots stations on a map that have data products, which meet user-defined criteria based on time of observation, station location, time cadence, magnetometer chain, etc. Note that Many of the ground magnetogram and geomagnetic index data products relevant to the MANGO effort are only available from their data providers in formats that allow the data to be packed. The formats used, and there are many types, save time in file retrieval and space on disk but resulting files require format conversion routines (i.e., from IAGA- 2002, WDC formats to flat ASCII tables) or specialized readers that unpack the desired magnetogram and index data. At present, 408 World Data Center ground magnetic field data products and the ring current Dst index data set have been converted into flat ASCII files, described via SPASE, and registered in the VMO metadata registry as a value-added service to users.
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