98APR15XB VLBI session (RDV08).
  Results of analysis and comments.
      -   Listing of the solution.
      WRMS of the solution is 32 psec, it is not bad, but VLBA experiments
      usually have better fit. I deselected GGAO, since it doesn't seem to
      improve geometry. Adjustments of positions of 12 sources:
      0201_113, NGC1052, NGC1218, 0422_004, 0919-260. 0920-397, 1104+728,
      1156+295 1416+067, 2149+056, VR422201, 2337+264 were significant and
      I left them in the final solution. I deselected a source 1910-293 -- it
      showed unusual problems. 
 
 Performance of the VLBA stations in the experiment were rather better 
      than European stations.
-   UPWEI table when positions of
           12 sources were estimated. Values at the last column has meaning 
           of the ratio of partial sum of squares of weighted residuals over 
           the certain baseline or source to its mathematical expectation.
      
-   UPWEI table when no source
           positions were estimated. 
-   Plot of residual phases  at the
           X-band for baseline NYALES20/ONSALA60 for the first 10 hours.
           Units are radians. Residual phases for 4 different channels are
           shown by different colors. 
-   Plot of residual phases  at the
           S-band for baseline NYALES20/ONSALA60 for the first 10 hours.
           Units are radians. Residual phases for 4 different channels are
           shown by different colors. 
-   Plot  of formal error of group delay 
           at X-band (hollow green circles) based on SNR and formal error of 
           determination of group delay based on phase residuals (filled blue
           circles) for the baseline NYALES20/ONSALA60. 
-   Plot of residual phases  at the
           X-band for baseline KP-VLBA/LA-VLBA for the first 10 hours.
           Units are radians. Residual phases for 4 different channels are
           shown by different colors. 
-   Plot of residual phases  at the
           S-band for baseline KP-VLBA/LA-VLBA for the first 10 hours.
           Units are radians. Residual phases for 4 different channels are
           shown by different colors. 
-   Plot  of formal error of group delay 
           at X-band (hollow green circles) based on SNR and formal error of 
           determination of group delay based on phase residuals (filled blue
           circles) for the baseline KP-VLBA/LA-VLBA. 
 Back  to Leonid Petrov's discussion page. 
Last update: 04-AUG-98 11:53:57