FTS Report on DOY 221

I.  The following are clock offsets, in microseconds between the clocks
at each DSN complex and each complex relative to UTC(NIST).  The offset
is a mean of readings using several GPS space vehicles in common view.


                SPC10     SPC40     SPC60     SPC40     SPC60
                MINUS     MINUS     MINUS     MINUS     MINUS
 MJD   DOY      NIST      NIST      NIST      SPC10     SPC10

54676  211      0.064     0.157^    1.095     0.093&    1.036
54677  212      0.084     0.150^    1.087     0.066&    1.003%
54678  213      0.102     0.145^    1.083     0.043&    0.998
54679  214      0.122     0.137$    1.074     0.015&    0.964
54680  215      0.145    -0.026#    1.067    -0.171&    0.940
54681  216      0.164    -0.032#    1.062    -0.196&    0.890
54682  217      0.184    -0.038#    1.056    -0.223&    0.877
54683  218      0.204    -0.044#    1.052    -0.248&    0.840
54684  219      0.225    -0.050#    1.042    -0.275&    0.820
54685  220      0.244    -0.056#    1.037    -0.301&    0.783
54686  221      0.265*   -0.062*    1.030*   -0.327*    0.760*
54687  222      0.285*   -0.068*    1.024*   -0.353*    0.731*

II.  Frequency Offsets from linear least-squares fits on time-offsets
over the period (54676 to 54685):

|------------------------------|-----------|-------------|-----------|
|                              | DELTA-F/F | UNCERTAINTY | STD. DEV. |
|        MEASUREMENT           |   (E-13)  | (+/- E-13)  |  (nsec.)  |
|------------------------------|-----------|-------------|-----------|
|  SPC10 RELATIVE TO UTC(NIST) |   2.338   |    0.014    |   1.084   |
|  SPC40 RELATIVE TO UTC(NIST) |  -0.696   |        0    |       0   |
|  SPC60 RELATIVE TO UTC(NIST) |  -0.742   |    0.017    |   1.327   |
|  SPC40 RELATIVE TO SPC10     |  -3.012   |    0.013    |   0.479   |
|  SPC60 RELATIVE TO SPC10     |  -3.281   |    0.117    |   9.155   |
|------------------------------|-----------|-------------|-----------|

III.  Comments:
* Values derived from linear least squares extrapolation or interpolation
^ Number obtained from the SPC40 GPS true time, with an offset.
& Direct subtraction between columns (SPC40-NIST) and (SPC10-NIST).
% There were not enough common-view SVs between SPC 60 and SPC 10. Direct subtraction was used.
$ The complex-wide power failure on DOY 214 (MJD 54679) caused the TA computer mother board to fail. 
  The spare TA computer also has a dead mother board. The MA was reset, the difference in  frequency was 150 nanoseconds. 
  TA computer was fixed on DOY 220 (MJD 54685). 
# Extrapolation backward used after the TA computer came back, and a different offset was used.