Quality check results of WLAD CGPS observation in 2008

Quality check of GPS observation were performed using TEQC software in version 2002Mar14.
Below you can find four charts for 2008.
Each plot contains the results for 3 elevation cut-off angles:
  • blue lines for angle of 5 degrees
  • red lines for angle of 10 degrees
  • green lines for angle of 15 degrees
Each important event, which can influence on the results of GPS data processing and times series of station coordinates is marked by vertical color lines as following:
  • - changing of the antanna type,
  • - changing of the antenna unit, but the same type,
  • - changing of the antenna's cover (instalation, deinstalation or changing its type),
  • - changing of the receiver type,
  • - changing of the receiver's firmware,
  • - changing of the receiver unit, but the same type,

Chart 1. Relative numbers (in percentage) of observation recorded during the session to theoretical number which should be available in the session for the specified station location;
 
Number of observations

Chart 2. Multipath effects of GPS signals receiving by GPS antenna for both frequencies: L1 and L2;
 
Mp1 i Mp2

Chart 3. Total number of observation recorded during observing sessions. You can see some characteristic events like e.g turning-on the new GPS satellites and/or turning-off ones due to it's orbital manoeuvre or failure;
 
Number of observations

Chart 4. Characteristic of observation continuity, expressed by number of 'cycle-slips' for specified number of recorded observation;
 
Number of observations

Below you can find links to similar quality check plots for the other calendar year periods of WLAD CGPS station activity:
2003 2004 2005 2006 2007 2008 2009
Last updated on: 2009-01-02