USNO Analysis Report for I18074 ($18MAR15XU) 
       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 solve/nuSolve analysis.) 

Problems: The second half of the session had numerous 0-codes on X-band, resulting in failed scans. 

Number of observations rejected during correlation:    1
    Scan 074-0906: source 0059+581

Number of observations not usable by the software:     9
    Scan 074-1842: FQ = 0 on S- & X-Band due to low SNR from source 2319+317
    Scan 074-1902: FQ = 0 on X-Band due to low SNR from source 1342+662
    Scan 074-1908: FQ = 0 on X-Band due to low SNR from source 1300+580
    Scan 074-1911: FQ = 0 on X-Band due to low SNR from source 1441+252
    Scan 074-1914: FQ = 0 on X-Band due to low SNR from source 1520+437
    Scan 074-1918: FQ = 0 on S- & X-Band due to low SNR from source 1342+662
    Scan 074-1922: FQ = 0 on S- & X-Band due to low SNR from source 1636+473
    Scan 074-1925: FQ = 0 on X-Band due to low SNR from source 1300+580
    Scan 074-1928: FQ = 0 on X-Band due to low SNR from source 1803+784

Number of observations rejected during analysis:       0 

Other comments: Preliminary solution; the data for NYALES20 have not arrived yet. 

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

Clock breaks: None

Session Statistics 

  Observations:       43 scheduled (from all stations---includes NYALES20)
                      21 scheduled (from available stations---does not include
                                    NYALES20)
                      20 correlated (included in the database) 
                      11 recoverable (usable in Solve/nuSolve) 
                      11 used
  Session fit:        55.676 ps
  UT1 formal error:   22.40 microsec 

Source Performance 

                    Number of Observations

                Scheduled  Correlated*    Used    

  0016+731              1           1        1
  0059+581              3           0        0
  0119+115              1           1        1
  0133+476              3           1        1
  0718+793              1           1        1
  1300+580              3           3        1
  1342+662              2           2        0
  1418+546              1           1        1
  1441+252              3           1        0
  1520+437              6           2        1
  1636+473              6           2        1
  1803+784              6           2        1
  3C371                 3           1        1
  2229+695              3           1        1
  2319+317              1           1        0
  ------------  ---------  ----------   ------
  Source Total         43          20       11

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