*
 *                   Copyright © 2003 Raytheon Company 
 *                             UNPUBLISHED WORK 
 *  
 *    No part of this work may be reproduced without the prior written 
 *    permission of Raytheon Company.
 *     
 *    Data in this directory is presented as is and without support. 
 *
 *    This data is provided solely for the use of the Equatorial Ionosphere
 *    Working Group for its technical analyses of the equatorial ionosphere 
 *    in support of global Satellite-Based Augmentation Systems (SBAS)
 *    development, and is not authorized for any wider distribution or use. 
 *     
 *    For permissions, please contact Mr. Steven M. Chapluk at (714) 446-2488.
 *


Filenames format:         Truth_tecs_YYMMDD.txt

Contents of directory:

Truth_tecs_020218.txt.gz
Truth_tecs_020219.txt.gz
Truth_tecs_020220.txt.gz

Each file has a one line header that indicates what each column represents.

Header             Representation

Time               J2000 time (time from Jan 1st 2000 12pm in seconds)
Stn                receiver name
GPS#               SVN
TEC                Iono vertical delay (calculated in TEC units)
Sigma              Sigma of the delay (calculated)
Az                 Azimuth (calculated)
El                 Elevation (calculated)
stnbias            receiver bias (calculated)
satbias            satellite bias (calculated)
stnlat             receiver latitude (input)
stnlon             receiver longitude (input)
stnheight          receiver height (input)

The latitude, longitude and height of the receiver may have changed.