USNO Analysis Report for W19080 ($19MAR21XW) 
       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 Christopher Dieck, 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:     5 

    observation  86, MK-VLBA :WETTZ13N, 0714+457, 08:09:42, quality codes - S:0, X:9 
    observation  95, MK-VLBA :WETTZELL, 0749+540, 08:16:06, quality codes - S:9, X:0 
    observation 131, MK-VLBA :WETTZ13N, 0714+457, 08:38:43, quality codes - S:0, X:9 
    observation 169, MK-VLBA :PIETOWN , 0641+392, 08:57:57, quality codes - S:9, X:0 
    observation 176, MK-VLBA :WETTZELL, 1342+662, 09:04:31, quality codes - S:0, X:9 

Number of observations rejected during analysis:      21

    The WETTZ13N:WETTZELL baseline was deselected, accounting for 18 observations. 

    observation 103, MK-VLBA :PIETOWN , 1418+546, 08:23:47, had a G-code on S-band
    observation 106, PIETOWN :WETTZ13N, 1418+546, 08:23:47, had a G-code on S-band
    observation 107, PIETOWN :WETTZELL, 1418+546, 08:23:47, had a G-code on S-band  

Other comments: None. 

Parameterization: 
   11 parameters: 
     UT1 offset 
     atmosphere offset for:
         MK-VLBA PIETOWN WETTZ13N WETTZELL
     clock offset (0), first order term (1), and/or second order term (2) for:
         PIETOWN (0,1) WETTZ13N (0,1) WETTZELL (0,1)

Clock breaks: None

Session Statistics 

  Observations:      195 scheduled 
                     195 correlated (included in the database) 
                     190 recoverable (usable in Solve/nuSolve) 
                     169 used
  Session fit:        55.592 ps
  UT1 formal error:    4.78 microsec 

Source Performance 

                    Number of Observations

                Scheduled  Correlated*    Used    

  0415+398              3           3        3
  0529+483              6           6        5
  0613+570             18          18       15
  0641+392              3           3        2
  0714+457             12          12        8
  0716+714             12          12       10
  0718+793              3           3        3
  0738+491              6           6        6
  0749+540              3           3        2
  0800+618              6           6        6
  0955+476             18          18       15
  1053+815              3           3        3
  1101+384              3           3        3
  1226+373              3           3        3
  1300+580              9           9        9
  1308+328              3           3        3
  1324+224              6           6        6
  1342+662              6           6        5
  1418+546             18          18       12
  1520+437             12          12       12
  1606+106             12          12       10
  1636+473              3           3        3
  NRAO512               6           6        6
  1639+230              3           3        3
  DA426                 3           3        3
  1803+784              6           6        5
  3C371                 6           6        5
  1823+689              3           3        3
  ------------  ---------  ----------   ------
  Source Total        195         195      169

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