FTS Report on DOY 223

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

55409  213      0.243    -1.173    -2.414    -1.416    -2.656
55410  214      0.257    -1.197    -2.421    -1.455    -2.678
55411  215      0.273    -1.223    -2.431    -1.497    -2.704
55412  216      0.290    -1.244    -2.435    -1.534    -2.723
55413  217      0.306    -1.271    -2.445    -1.578    -2.750
55414  218      0.322    -1.294    -2.451    -1.618    -2.772
55415  219      0.338    -1.318    -2.458    -1.657    -2.795
55416  220      0.355    -1.343    -2.465    -1.700    -2.819
55417  221      0.372    -1.371    -2.472    -1.743    -2.843
55418  222      0.390    -1.393    -2.479    -1.785    -2.868
55419  223      0.405*   -1.417*   -2.487*   -1.824*   -2.890*
55420  224      0.421*   -1.442*   -2.494*   -1.864*   -2.913*
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 55409 to 55418
 -----------------------------------------------------------------------
|                                 | DELTA-F/F | UNCERTAINTY | STD. DEV. |
|           MEASUREMENT           |  (E-13)   | (+/- E-13)  |  (nsec.)  |
|---------------------------------|-----------|-------------|-----------|
|   SPC10 RELATIVE TO UTC(NIST)   |    1.894  |    0.014    |   1.086   |
|   SPC40 RELATIVE TO UTC(NIST)   |   -2.838  |    0.017    |   1.356   |
|   SPC60 RELATIVE TO UTC(NIST)   |   -0.832  |    0.012    |   0.921   |
|   SPC40 RELATIVE TO SPC10       |   -4.737  |    0.024    |   1.834   |
|   SPC60 RELATIVE TO SPC10       |   -2.716  |    0.016    |   1.260   |
 -----------------------------------------------------------------------

III.
Comments: * Values derived from linear least squares extrapolation or interpolation.

On DOY 167, it was discovered that the new FTS receivers have been incorrectly calibrated. The time offset could be off by up to 40 to 50 nanoseconds. 
SPC 10 receiver has been recalibrated remotely on DOY 176 (MJD 55372). The time offset was adjusted by 43 nanoseconds. 
SPC 40 and SPC 60 receiver will be recalibrated later.

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

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



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