FTS Report on DOY 170

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

57182  160      0.560    -0.259    -0.333    -0.819    -0.890
57183  161      0.563    -0.265    -0.347    -0.827    -0.906
57184  162      0.565#   -0.276    -0.372    -0.839#   -0.930#
57185  163      0.568#   -0.288    -0.391    -0.849#   -0.952#
57186  164      0.570#   -0.299    -0.414    -0.859#   -0.973#
57187  165      0.572#   -0.304    -0.432    -0.869#   -0.995#
57188  166      0.575#   -0.317    -0.454    -0.880#   -1.017#
57189  167      0.577#   -0.326    -0.475    -0.890#   -1.040#
57190  168      0.571    -0.334    -0.494    -0.906    -1.062
57191  169      0.568    -0.351    -0.520    -0.918    -1.085
57192  170      0.576*   -0.357*   -0.538*   -0.926*   -1.106*
57193  171      0.577*   -0.367*   -0.558*   -0.936*   -1.127*
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 57182 to 57191
 -----------------------------------------------------------------------
|                                 | DELTA-F/F | UNCERTAINTY | STD. DEV. |
|           MEASUREMENT           |  (E-13)   | (+/- E-13)  |  (nsec.)  |
|---------------------------------|-----------|-------------|-----------|
|   SPC10 RELATIVE TO UTC(USNO)   |    0.145  |    0.046    |   3.565   |
|   SPC40 RELATIVE TO UTC(USNO)   |   -1.159  |    0.031    |   2.391   |
|   SPC60 RELATIVE TO UTC(USNO)   |   -2.406  |    0.028    |   2.215   |
|   SPC40 RELATIVE TO SPC10       |   -1.259  |    0.028    |   2.210   |
|   SPC60 RELATIVE TO SPC10       |   -2.537  |    0.019    |   1.499   |
 -----------------------------------------------------------------------

III.
Comments: 
# SPC 10 computers (both GPSA and GPSB) were automatically rebooted on DOY 162 (MJD 57184), unbeknown to FTS personnel. The receivers were not restarted, causing data gap from MJD 57184 thru 57187. GPSB receiver was recovered partially, only recorded 2 to 3 hours at end of each day (57188 and 57189). Data continued to be extrapolated.

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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