USNO Analysis Report for I21018 ($21JAN18XU) 
       This report is a contributed analysis report that does not correspond to 
       the database maintained by the IVS Data Centers for this session.  
   (Analyzed by Nicole Geiger, US Naval Observatory.
    Spoolfile source: interactive nuSolve analysis.) 

Problems: None. 

Number of observations rejected during correlation:    0 

Number of observations not usable by the software:    11 

    observation    8, MK-VLBA :WETTZELL, 1800+440, 18:46:07, quality code X: 9 S: 0, fringe code X: ' ' S: ' ' 
    observation    9, MK-VLBA :WETTZELL, 1803+784, 18:48:15, quality code X: 9 S: 8, fringe code X: ' ' S: 'G' 
    observation   10, MK-VLBA :WETTZELL, 0016+731, 18:49:50, quality code X: 9 S: 7, fringe code X: ' ' S: 'G' 
    observation   11, MK-VLBA :WETTZELL, 1823+689, 18:52:41, quality code X: 9 S: 0, fringe code X: ' ' S: ' ' 
    observation   12, MK-VLBA :WETTZELL, 2229+695, 18:55:18, quality code X: 9 S: 8, fringe code X: ' ' S: 'G' 
    observation   14, MK-VLBA :WETTZELL, 3C371   , 18:59:13, quality code X: 9 S: 7, fringe code X: ' ' S: 'G' 
    observation   15, MK-VLBA :WETTZELL, 1053+815, 19:01:20, quality code X: 9 S: 8, fringe code X: ' ' S: 'G' 
    observation   18, MK-VLBA :WETTZELL, 1800+440, 19:09:56, quality code X: 9 S: 0, fringe code X: ' ' S: ' ' 
    observation   23, MK-VLBA :WETTZELL, 3C371   , 19:20:56, quality code X: 9 S: 8, fringe code X: ' ' S: 'G' 
    observation   24, MK-VLBA :WETTZELL, 2229+695, 19:22:29, quality code X: 8 S: 8, fringe code X: ' ' S: 'G' 
    observation   25, MK-VLBA :WETTZELL, 1053+815, 19:24:21, quality code X: 9 S: 7, fringe code X: ' ' S: 'G' 

Number of observations rejected during analysis:       0 

Other comments: None. 

Parameterization: 
   5 parameters: 
     UT1 offset 
     atmosphere offset for:
         MK-VLBA WETTZELL
     clock offset (0), first order term (1), and/or second order term (2) for:
         MK-VLBA (0,1)

Clock breaks: None

Session Statistics 

  Observations:       27 scheduled 
                      27 correlated (included in the database) 
                      16 recoverable (usable in Solve/nuSolve) 
                      16 used
  Session fit:        46.262 ps
  UT1 formal error:   39.02 microsec 

Source Performance 

                    Number of Observations

                Scheduled  Correlated*    Used    

  0016+731              2           2        1
  1053+815              3           3        1
  1418+546              1           1        1
  NGC6251               2           2        2
  1636+473              3           3        3
  1746+470              4           4        4
  1803+784              2           2        1
  1800+440              2           2        0
  3C371                 3           3        1
  1823+689              2           2        1
  2229+695              3           3        1
  ------------  ---------  ----------   ------
  Source Total         27          27       16

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