FTS Report on DOY 156

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

56072  146      0.088    -0.104    -0.750    -0.193    -0.836
56073  147      0.081    -0.117    -0.771    -0.201    -0.851
56074  148      0.077    -0.130    -0.789    -0.209    -0.865
56075  149      0.072    -0.138$   -0.806    -0.213$   -0.877
56076  150      0.067    -0.136    -0.825    -0.204    -0.891
56077  151      0.061%   -0.132    -0.843    -0.195%   -0.903%
56078  152      0.055    -0.127    -0.860    -0.185    -0.913
56079  153      0.049    -0.125    -0.878    -0.176    -0.926
56080  154     10.321#   -0.127    -0.898   -10.451#  -11.221#
56081  155     10.325    -0.119    -0.914   -10.445   -11.237
56082  156      7.573*   -0.117*   -0.933*  -10.435*   -8.506*
56083  157      8.565*   -0.114*   -0.951*  -12.262*   -9.516*
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 56072 to 56081
 -----------------------------------------------------------------------
|                                 | DELTA-F/F | UNCERTAINTY | STD. DEV. |
|           MEASUREMENT           |  (E-13)   | (+/- E-13)  |  (nsec.)  |
|---------------------------------|-----------|-------------|-----------|
|   SPC10 RELATIVE TO UTC(NIST)   |  114.770  |   40.009    | 3111.079   |
|   SPC40 RELATIVE TO UTC(NIST)   |    0.346  |    0.027    |   2.069   |
|   SPC60 RELATIVE TO UTC(NIST)   |   -2.090  |    0.012    |   0.931   |
|   SPC40 RELATIVE TO SPC10       |  -211.529  |   39.526    | 3073.542   |
|   SPC60 RELATIVE TO SPC10       |  -116.880  |   40.020    | 3111.952   |
 -----------------------------------------------------------------------

III.
Comments: 
$ SPC 40 prime frequency standard, old HM2 Symmetricom (HM-264) was switched to newly installed HM1 Symmetricom (HM-275) on DOY 149/0145 UTC.
% SPC 10 1 PPS generator failed DOY 151/1630 UTC. 
# SPC 10 MCA failed on DOY 153/2245 UTC. The Frequency Reference Distribution(FRD)failed, cutting off the 100 MHZ supply. It was restored at 2346 UTC, same day.
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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