USNO Analysis Report for Q21108 ($21APR18XK) 
       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:     4 

    observation    2, WETTZELL:MK-VLBA , 1746+470, 07:32:17, quality code X: 0 S: 0, fringe code X: ' ' S: ' ' 
    observation    3, WETTZELL:MK-VLBA , 3C371   , 07:33:22, quality code X: 0 S: 9, fringe code X: ' ' S: ' ' 
    observation   23, WETTZELL:MK-VLBA , 1806+456, 07:57:39, quality code X: 0 S: 0, fringe code X: ' ' S: ' ' 
    observation   38, WETTZELL:MK-VLBA , 1751+288, 08:16:44, quality code X: 0 S: 0, fringe code X: ' ' S: ' ' 

Number of observations rejected during analysis:       3 

    observation   10, WETTZELL:MK-VLBA , 0814+425, 07:40:56, which fits at     -359.6 +/-      52.8 ps 
    observation   15, WETTZELL:MK-VLBA , 1504+377, 07:48:01, which fits at      648.6 +/-      55.3 ps 
    observation   34, WETTZELL:MK-VLBA , 1504+377, 08:11:41, which fits at     2694.0 +/-      56.3 ps 

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:       48 scheduled 
                      48 correlated (included in the database) 
                      44 recoverable (usable in Solve/nuSolve) 
                      41 used
  Session fit:        45.616 ps
  UT1 formal error:    5.73 microsec 

Source Performance 

                    Number of Observations

                Scheduled  Correlated*    Used    

  0529+483              3           3        3
  0552+398              3           3        3
  0613+570              3           3        3
  0642+449              2           2        2
  0716+714              3           3        3
  0738+491              2           2        2
  0814+425              1           1        0
  1039+811              2           2        2
  1053+704              1           1        1
  1417+385              2           2        2
  1418+546              2           2        2
  1504+377              2           2        0
  1616+063              1           1        1
  1617+229              2           2        2
  1639+230              2           2        2
  DA426                 1           1        1
  1732+389              1           1        1
  1746+470              3           3        2
  1751+288              1           1        0
  1758+388              1           1        1
  1803+784              3           3        3
  1806+456              2           2        1
  3C371                 3           3        2
  1849+670              2           2        2
  ------------  ---------  ----------   ------
  Source Total         48          48       41

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