USNO Analysis Report for I21358 ($21DEC24XU) 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 David Gordon, US Naval Observatory. Spoolfile source: interactive nuSolve analysis.) Problems: X-band very noisy, reason unknown. Clock break used at 18:45 UTC. Very large UT1 uncertainty. Number of observations rejected during correlation: 0 Number of observations not usable by the software: 10 observation 8, MK-VLBA :WETTZELL, 1520+437, 18:47:04, quality code X: 0 S: 9, fringe code X: ' ' S: ' ' observation 23, MK-VLBA :WETTZELL, 1520+437, 19:22:36, quality code X: 0 S: 9, fringe code X: ' ' S: ' ' observation 24, MK-VLBA :WETTZELL, 1929+226, 19:26:34, quality code X: 0 S: 0, fringe code X: ' ' S: ' ' Number of observations rejected during analysis: 8 Other comments: None. Parameterization: 9 parameters: UT1 offset atmosphere offset for: MK-VLBA WETTZELL clock offset, first order term, and second order term for: MK-VLBA Clock breaks: None Session Statistics Observations: 30 scheduled 30 correlated (included in the database) 20 recoverable (usable in Solve/nuSolve) 12 used Session fit: 64.864 ps UT1 formal error: 79.29 microsec Source Performance Number of Observations Scheduled Correlated* Used 0016+731 2 2 0 1053+815 3 3 2 1300+580 1 1 0 1418+546 3 3 3 NGC6251 3 3 0 1636+473 3 3 3 1746+470 4 4 2 1803+784 3 3 0 3C371 3 3 1 1823+689 2 2 0 2229+695 3 3 1 ------------ --------- ---------- ------ Source Total 30 30 12 * Correlated means included in the database. Please note that the number of recoverable (usable) observations cannot be broken down by source for Intensive solutions.