FTS Report on DOY 179

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

57922  169     -1.524     0.214    -0.496     1.739     1.031
57923  170     -1.503     0.197    -0.471     1.700     1.034
57924  171     -1.479     0.180    -0.446     1.660     1.035
57925  172     -1.460     0.163    -0.425     1.623     1.037
57926  173     -1.440     0.146    -0.402     1.586     1.040
57927  174     -1.418     0.126    -0.381     1.545     1.039
57928  175     -1.396     0.111    -0.357     1.506     1.041
57929  176     -1.376     0.095    -0.334     1.470     1.043
57930  177     -1.355     0.075    -0.312     1.431     1.046
57931  178     -1.336     0.057    -0.290     1.393     1.048
57932  179     -1.313*    0.041*   -0.266*    1.354*    1.049*
57933  180     -1.292*    0.023*   -0.243*    1.316*    1.051*
 

II.  Frequency Offsets from linear least-squares fits on time-offsets over the period from 57922 to 57931
 -----------------------------------------------------------------------
|                                 | DELTA-F/F | UNCERTAINTY | STD. DEV. |
|           MEASUREMENT           |  (E-13)   | (+/- E-13)  |  (nsec.)  |
|---------------------------------|-----------|-------------|-----------|
|   SPC10 RELATIVE TO UTC(USNO)   |    2.427  |    0.016    |   1.257   |
|   SPC40 RELATIVE TO UTC(USNO)   |   -2.015  |    0.012    |   0.946   |
|   SPC60 RELATIVE TO UTC(USNO)   |    2.632  |    0.016    |   1.207   |
|   SPC40 RELATIVE TO SPC10       |   -4.447  |    0.013    |   1.002   |
|   SPC60 RELATIVE TO SPC10       |    0.207  |    0.013    |   0.996   |
 -----------------------------------------------------------------------

III.
Comments: 
Values derived from linear least squares extrapolation or interpolation are indicated by (*) next to the time offset.
$ Between DOY 162 (MJD 57915) and DOY 173 (MJD 57926) the USNO multi-channel receiver were displaying bad data. The problem was fixed since DOY 174 (MJD 57927). Bad data were being removed by hand. 

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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