[teqc] TEC mesuarement

Lou Estey lou at unavco.org
Wed Jan 2 10:20:14 MST 2008

Evgeny Brainin wrote:
> Hi ALL
> I want to know how teqc calculate TEC (total electron content), by which 
> formula? and why sometimes i get negative data of TEC?

This option was just an experiment that we tried 11 years ago.  The data in
the .tec file is just a simple rescaling of the .ion by:


where 1227.6e6 is the L2 carrier frequency in Hz.  I can't locate the
reference that comes from, but Chris Rocken (who is on this list) should

At this point, the option should probably just be removed because I think
it causes more confusion that any good that comes from it.


Louis H. Estey, Ph.D.              office:  [+001] 303-381-7456
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