NSSDC Offers WWW-Available CGM Coordinate Transformations

Volume 11, Number 3, September 1995
By Natalia Papitashvili and Joseph King
NSSDC has created a new World Wide Web (WWW) page offering the ability to do coordinate transformations between Corrected GeoMagnetic (CGM) and Geographic coordinate systems. CGM coordinates are frequently used in studies of ionosphere-magnetospheric coupling processes. The WWW page enables the users to specify their time and altitude of interest. They then specify a latitude and longitude in one coordinate system and are provided the latitude and longitude in the other system. Alternatively, they can click on a point on a world map and be provided latitude and longitude in both coordinate systems. In both cases, users are also provided additional parameters such as the Earth-surface footpoints of the magnetic field line passing through the user-selected point.

This WWW page is envisioned as the first of a family of new WWW pages offering transformations among other magnetosphere-relevant and heliosphere-relevant coordinate systems; access to and executability of selected atmospheric, ionospheric, and magnetospheric models; and heliospheric spacecraft trajectory information.

The new CGM page is at http://nssdc.gsfc.nasa.gov/space/cgm/cgm.html. The future families of pages referenced will become accessible at http://nssdc.gsfc.nasa.gov/space.

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Author:Miranda Beall
Curators: Erin Gardner and Miranda Beall
Responsible Official: Dr. Joseph H. King, Code 633
Last Revised: 04 Dec 1996 [EDG]