FTS Report on DOY 198

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

56480  188      0.080     0.028    -0.464    -0.051    -0.539
56481  189      0.097     0.010    -0.442    -0.086    -0.535
56482  190      0.117    -0.001    -0.418    -0.117    -0.532
56483  191      0.136    -0.007    -0.398    -0.144    -0.532
56484  192      0.151    -0.019    -0.373    -0.170    -0.521
56485  193      0.168    -0.034    -0.351    -0.201    -0.515
56486  194      0.188    -0.046    -0.331    -0.234    -0.515
56487  195      0.202    -0.060    -0.305    -0.260    -0.502
56488  196      0.219    -0.073    -0.286    -0.291    -0.501
56489  197     -0.112@   -0.085    -0.261     0.030@   -0.128@
56490  198     -0.095%   -0.096*   -0.239*   -0.003%   -0.125%
56491  199     -0.078%   -0.108*   -0.217*   -0.036%   -0.122%
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 56480 to 56489
 -----------------------------------------------------------------------
|                                 | DELTA-F/F | UNCERTAINTY | STD. DEV. |
|           MEASUREMENT           |  (E-13)   | (+/- E-13)  |  (nsec.)  |
|---------------------------------|-----------|-------------|-----------|
|   SPC10 RELATIVE TO UTC(USNO)   |    #####  |    #####    |   #####   |
|   SPC40 RELATIVE TO UTC(USNO)   |   -1.416  |    0.030    |   2.330   |
|   SPC60 RELATIVE TO UTC(USNO)   |    2.602  |    0.015    |   1.197   |
|   SPC40 RELATIVE TO SPC10       |    #####  |    #####    |   #####   |
|   SPC60 RELATIVE TO SPC10       |    #####  |    #####    |   #####   |
 -----------------------------------------------------------------------

III.
Comments: 
@ SPC 10 Master Clock was reset following a planned station power outage on DOY 197 (MJD 56489). The reported time offset for DOY 197 has been computed from the average of the last 4 hours of that day. The time was shifted by about -0.35 microseconds. 
% Time offset is estimated based on the SPC10 current frequency drifting of about 2*E-13.
#### SPC10 frequency offset and drift was not affected by the power outage. SPC10 frequency offset with respect to USNO for this reporting period is assumed to remain unchanged at *approximately* 2.0E-13. Publication of the SPC10 frequency offset will resume following at least 3 days valid time offset data after the discontinuity.


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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