FTS Report on DOY 307

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

56954  297      0.462     0.786     0.508     0.325     0.050
56955  298      0.452     0.789     0.526     0.337     0.074
56956  299      0.444     0.798     0.545     0.354     0.104
56957  300      0.431     0.791     0.560     0.359     0.131
56958  301      0.417     0.780     0.569     0.363     0.154
56959  302      0.408     0.784     0.587     0.377     0.182
56960  303      0.398     0.785     0.603     0.387     0.207
56961  304      0.390     0.786     0.619     0.396     0.233
56962  305      0.377     0.785     0.636     0.407     0.260
56963  306      0.362     0.783     0.646     0.422     0.288
56964  307      0.354*    0.783*    0.664*    0.428*    0.313*
56965  308      0.343*    0.782*    0.679*    0.438*    0.339*
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 56954 to 56963
 -----------------------------------------------------------------------
|                                 | DELTA-F/F | UNCERTAINTY | STD. DEV. |
|           MEASUREMENT           |  (E-13)   | (+/- E-13)  |  (nsec.)  |
|---------------------------------|-----------|-------------|-----------|
|   SPC10 RELATIVE TO UTC(USNO)   |   -1.259  |    0.026    |   1.993   |
|   SPC40 RELATIVE TO UTC(USNO)   |   -0.086  |    0.056    |   4.327   |
|   SPC60 RELATIVE TO UTC(USNO)   |    1.769  |    0.031    |   2.380   |
|   SPC40 RELATIVE TO SPC10       |    1.170  |    0.042    |   3.261   |
|   SPC60 RELATIVE TO SPC10       |    3.046  |    0.018    |   1.374   |
 -----------------------------------------------------------------------

III.
Comments:  On DOY 335, re-adjusted time offsets for SPC 40 between DOY 302 (MJD 56960) and DOY 313 (MJD 56970) by 41.62 nanoseconds. This was to properly re-align the time offsets which occur due to the switch to using GPS B receiver following the GPS A computer failure.

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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