External(T96) and Internal Geomagnetic Field Model Parameters at SPDF

External (T96) and Internal Geomagnetic Field Model Parameters at SPDF

This service is based on the external sources magnetospheric field model T96_01 developed by Dr. Nikolai A. Tsyganenko, and the internal sources, DGRF/IGRF geomagnetic field models for Epochs 1965-2005 and the secular variation model 2005-2010. The T96_01 model is a recently released version of the new data-based geomagnetospheric magnetic field models with explicitly defined realistic magnetopause, large-scale Region 1 and 2 Birkeland current systems, and the interplanetary magnetic field (IMF) penetration across the boundary. This version is parameterized by the IMF By and Bz components, solar wind dynamic pressure, and the Dst index used as the input parameters.

This service allows the user to specify a point in 3D space in GEOcentric spherical coordinates and then to calculate:

dipole MAGnetic and corrected geomagnetic (CGM) coordinates of the point;
GEOcentric, dipole MAGnetic, and CGM coordinates of the conjugate point;
geomagnetic field component values at the specified point and at its conjugate point;
apex of the magnetic field line (i.e., its farthest point from the Earth's center), passing through the specified point;
B-minimum value for the geomagnetic field line, passing through the specified point.

Algorithm Brief Description

Please Click and Fill the Form below, then Submit Query to start calculations:

Year (from 1965 to 2010): Day (from 1 to 366):
Hour(UT, from 0 to 23): Minute (from 0 to 59): Second (from 0 to 59):
Geocentric Latitude (deg.): [from -90.00 to 90.00]:
Longitude(deg.): [from 0.00 to 360.00]:
Altitude above Earth's (1-Re) surface (km) :[from 0. to 40000.]
Specify SW parameters and Dst-index: Den(n/cm^3), Vel(km/sec), BY and BZ (nT) in GSM, and Dst index, or leave this line empty and then ALL above-mentioned parameters will be taken from the hourly OMNI data base for the current or prior hour - see the algorithm's brief description:

Note: Every value(if it is specified) should be separated by comma or space( e.g.: 3.,400., 5.,-6.,-30.).

SPDF > ModelWeb

If you have any questions/comments about an algorithm or computer code of this service contact: Dr. Vladimir Papitashvili, E-mail: papita@umich.edu, Space Physics Research Laboratory, The University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109-2143

If you have any questions/comments about this service available from SPDF, contact: Dr. Natalia Papitashvili,E-mail: Natalia.E.Papitashvili@gsfc.nasa.gov, Mail Code 672, NASA/Goddard Space Flight Center, Greenbelt, MD 20771

NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility