IVS Analysis Report for I20048 ($20FEB17XU) 
       This report is the official IVS analysis report that corresponds to 
       the database maintained by the IVS Data Centers for this session.  
   (Analyzed by Karen Baver, Goddard Space Flight Center VLBI Analysis Center.
    Spoolfile source: interactive solve/nuSolve analysis.) 

Problems: Four observations had very large residuals and contributed to a large
          UT1 formal error. No single source was responsible.

Number of observations rejected during correlation:    0 

Number of observations not usable by the software:     9 

    observation    1, MK-VLBA :WETTZELL, 1418+546, 18:30:20, quality code X-band: 9 S-band: 0 
    observation    2, MK-VLBA :WETTZELL, 2307+106, 18:33:12, quality code X-band: 0 S-band: 9 
    observation    5, MK-VLBA :WETTZELL, 2209+236, 18:38:09, quality code X-band: 0 S-band: 0 
    observation   10, MK-VLBA :WETTZELL, 1053+815, 18:48:24, quality code X-band: 0 S-band: 9 
    observation   12, MK-VLBA :WETTZELL, 2214+350, 18:53:18, quality code X-band: 0 S-band: 9 
    observation   17, MK-VLBA :WETTZELL, 1823+689, 19:05:06, quality code X-band: 0 S-band: 9 
    observation   20, MK-VLBA :WETTZELL, 0133+476, 19:12:34, quality code X-band: 0 S-band: 0 
    observation   22, MK-VLBA :WETTZELL, NGC6251 , 19:16:06, quality code X-band: 9 S-band: 0 
    observation   23, MK-VLBA :WETTZELL, 2214+350, 19:18:10, quality code X-band: 0 S-band: 9 

Number of observations rejected during analysis:       1 

    observation    7, MK-VLBA :WETTZELL, 2229+695, 18:41:11, which fits at     1471.2 +/-     554.8 ps 

Other comments: None. 

Parameterization: 
   6 parameters: 
     UT1 offset 
     atmosphere offset for:
         MK-VLBA WETTZELL
     clock offset, first order term, and second order term for:
         WETTZELL

Clock breaks: None

Session Statistics 

  Observations:       28 scheduled 
                      28 correlated (included in the database) 
                      19 recoverable (usable in Solve/nuSolve) 
                      18 used
  Session fit:        75.132 ps
  UT1 formal error:   41.18 microsec 

Source Performance 

                    Number of Observations

                Scheduled  Correlated*    Used    

  0016+731              1           1        1
  0059+581              2           2        2
  0133+476              1           1        0
  0718+793              2           2        2
  1053+815              1           1        0
  1226+373              1           1        1
  1300+580              2           2        2
  1308+328              1           1        1
  1342+662              1           1        1
  1418+546              1           1        0
  1520+437              1           1        1
  NGC6251               1           1        0
  1636+473              2           2        2
  1746+470              2           2        2
  1803+784              1           1        1
  1823+689              1           1        0
  2209+236              1           1        0
  2214+350              2           2        0
  2229+695              1           1        0
  2307+106              1           1        0
  2319+317              2           2        2
  ------------  ---------  ----------   ------
  Source Total         28          28       18

 * Correlated means included in the database. 
   Please note that the number of recoverable (usable) observations 
   cannot be broken down by source for Intensive solutions.