FTS Report on DOY 172

I.  The following are clock offsets, in microseconds between the clocks
at each DSN complex and each complex relative to UTC(USNO).  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      USNO      USNO      USNO      SPC10     SPC10

56454  162     -1.728     0.377    -0.661     2.133     1.072
56455  163     -1.748     0.371    -0.688     2.119     1.063
56456  164     -1.770     0.363    -0.709     2.133     1.065
56457  165     -1.791     0.356    -0.733     2.148     1.062
56458  166     -1.810     0.349    -0.756     2.159     1.058
56459  167     -1.832     0.341    -0.780     2.173     1.055
56460  168     -1.853     0.336    -0.801     2.189     1.056
56461  169     -1.878     0.324    -0.828     2.204     1.055
56462  170     -1.902#    0.314    -0.856     2.216#    1.054#
56463  171     -0.268     0.311    -0.869%    0.580    -0.594%
56464  172     -1.281*    0.302*   -0.897*    1.578*    0.390*
56465  173     -1.212*    0.295*   -0.920*    1.501*    0.299*
Values derived from linear least squares extrapolation or interpolation are indicated by (*) next to the time offset. 

II.  Frequency Offsets from linear least-squares fits on time-offsets over the period from 56454 to 56463
 -----------------------------------------------------------------------
|                                 | DELTA-F/F | UNCERTAINTY | STD. DEV. |
|           MEASUREMENT           |  (E-13)   | (+/- E-13)  |  (nsec.)  |
|---------------------------------|-----------|-------------|-----------|
|   SPC10 RELATIVE TO UTC(USNO)   |   #####   |    #####    |   #####   |
|   SPC40 RELATIVE TO UTC(USNO)   |   -0.880  |    0.024    |   1.867   |
|   SPC60 RELATIVE TO UTC(USNO)   |   -2.711  |    0.036    |   2.826   |
|   SPC40 RELATIVE TO SPC10       |   #####   |    #####    |   #####   |
|   SPC60 RELATIVE TO SPC10       |   #####   |    #####    |   #####   |
 -----------------------------------------------------------------------

III.
Comments: 
# SPC 10 scheduled power outage on DOY 170 (MJD 56462) forced a time shift of about 1.5 microseconds. The frequency was also adjusted by 2.5*E-13 on DOY 171/1700 UTC. During the 12 hour period right after the power recovered, the frequency offset was inadvertently set to 1.2*E-12.
#### Publication of the SPC10 frequency offset will resume following at least 3 days valid time offset data after the discontinuity.
% SPC 60 frequency was adjusted by 5.7*E-13 on DOY 171 (MJD 56463).

NOTES: All DSN data are from the new multichannel receivers.
SPC 10 and SPC 60 offsets are commonviewed with USNO and with each other.
SPC 40 offsets are all-in-viewed with USNO and with SPC 10. 

FTS Contacts: Connie Dang (626)305-6194 :: Linh La (626)305-6184



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