USNO Analysis Report for Q19021 ($19JAN21XK) 
       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:    3 

    WETTZ13N:WETTZELL, 0642+449, 07:30:20 --- not in database, probable G- or H- code in S-band
    WETTZ13N:WETTZELL, 0529+483, 07:50:00 --- not in database, probable G- or H- code in S-band 
    NYALES20:WETTZELL, 3C418   , 07:56:09 --- not in database, probable G- or H- code in both bands

Number of observations not usable by the software:     6 

    observation  42, ISHIOKA :WETTZ13N, 0016+731, 07:05:49, quality codes - S:0, X:9 
    observation  43, ISHIOKA :WETTZELL, 0016+731, 07:05:49, quality codes - S:0, X:9 
    observation  84, ISHIOKA :WETTZ13N, 1929+226, 07:14:18, quality codes - S:9, X:0 
    observation 144, ISHIOKA :WETTZ13N, 0016+731, 07:24:29, quality codes - S:0, X:9 
    observation 145, ISHIOKA :WETTZELL, 0016+731, 07:24:29, quality codes - S:0, X:9 
    observation 220, ISHIOKA :WETTZ13N, 1929+226, 07:38:09, quality codes - S:9, X:0 

Number of observations rejected during analysis:       7 

    observation  81, WETTZ13N:WETTZELL, 2209+236, 07:11:49, which fits at -1883.0 +/- 24.9 ps 
    observation  89, SESHAN25:WETTZ13N, 1929+226, 07:14:18, which fits at  -342.9 +/- 66.6 ps 
    observation  90, SESHAN25:WETTZELL, 1929+226, 07:14:18, which fits at  -294.4 +/- 50.3 ps 
    observation 221, ISHIOKA :WETTZELL, 1929+226, 07:38:09, which fits at  -294.1 +/- 82.8 ps 
    observation 226, SESHAN25:WETTZELL, 1929+226, 07:38:09, which fits at  -333.6 +/- 50.7 ps 
    observation 237, WETTZ13N:WETTZELL, 2309+454, 07:40:58, which fits at  -342.7 +/- 24.0 ps 
    observation 336, WETTZ13N:WETTZELL, 1846+322, 07:58:49, which fits at 12484.1 +/- 22.3 ps 

Other comments: None. 

Parameterization: 
   14 parameters: 
     UT1 offset 
     atmosphere offset for:
         ISHIOKA NYALES20 SESHAN25 WETTZ13N WETTZELL
     clock offset (0), first order term (1), and/or second order term (2) for:
         NYALES20 (0,1) SESHAN25 (0,1) WETTZ13N (0,1) WETTZELL (0,1)

Clock breaks: None

Session Statistics 

  Observations:      337 scheduled 
                     334 correlated (included in the database) 
                     328 recoverable (usable in Solve/nuSolve) 
                     321 used
  Session fit:        31.006 ps
  UT1 formal error:    3.31 microsec 

Source Performance 

                    Number of Observations

                Scheduled  Correlated*    Used    

  0059+581             16          16       16
  0133+476             20          20       20
  3C371                11          11       11
  3C418                30          29       29
  2113+293             10          10       10
  1846+322             10          10        9
  2229+695             10          10       10
  0529+483             20          19       19
  2141+175             10          10       10
  2309+454             20          20       19
  0642+449             19          18       18
  1751+288             10          10       10
  0016+731             13          13        9
  0716+714             30          30       30
  0805+410              6           6        6
  1726+455             30          30       30
  1732+389              1           1        1
  1803+784             21          21       21
  1929+226             20          20       14
  2000+472             10          10       10
  2209+236             10          10        9
  2215+150             10          10       10
  ------------  ---------  ----------   ------
  Source Total        337         334      321

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