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

57915  162     -1.675$    0.349    -0.642     2.021$    1.029$
57916  163     -1.667     0.318    -0.637     1.985     1.032
57917  164     -1.644     0.300    -0.615     1.942     1.031
57918  165     -1.619     0.282    -0.591     1.900     1.030
57919  166     -1.592     0.265    -0.566     1.859     1.029
57920  167     -1.574     0.248    -0.544     1.819     1.032
57921  168     -1.545     0.234    -0.518     1.780     1.030
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     -1.457*    0.160*   -0.427*    1.619*    1.033*
57926  173     -1.435*    0.142*   -0.405*    1.578*    1.034*

II.  Frequency Offsets from linear least-squares fits on time-offsets over the period from 57915 to 57924
 -----------------------------------------------------------------------
|                                 | DELTA-F/F | UNCERTAINTY | STD. DEV. |
|           MEASUREMENT           |  (E-13)   | (+/- E-13)  |  (nsec.)  |
|---------------------------------|-----------|-------------|-----------|
|   SPC10 RELATIVE TO UTC(USNO)   |    2.624  |    0.055    |   4.311   |
|   SPC40 RELATIVE TO UTC(USNO)   |   -2.073  |    0.055    |   4.277   |
|   SPC60 RELATIVE TO UTC(USNO)   |    2.636  |    0.071    |   5.511   |
|   SPC40 RELATIVE TO SPC10       |   -4.669  |    0.019    |   1.465   |
|   SPC60 RELATIVE TO SPC10       |    0.043  |    0.020    |   1.526   |
 -----------------------------------------------------------------------

III.
Comments: 
Values derived from linear least squares extrapolation or interpolation are indicated by (*) next to the time offset. 
$ Starting DOY 162 (MJD 57915) USNO multi-channel receiver has been displaying bad data. The problem could be due to the Klobuchar calculation. Bad data are 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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