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        @    MTA Monitoring Report 7/21/00 - 7/27/00    @
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Archive of all weekly reports
http://asc.harvard.edu/mta/REPORTS/weekly.html

Archive of Monthly reports
http://asc.harvard.edu/mta/REPORTS/MONTHLY

There will be no report next Friday due to the Chandra review.
The Report of August 11 will cover 2 weeks.

             ************ CTI trend *************

All CTI's are steady this week.

Software note:
A linear line fits on Mn K-alpha is now done for data points
within one sigma range. All data points outside of the range
are dropped. These out-outliers are usually observations made
during squeegee tests or higher temperature observations,
and will be dropped from database in near future.


          *********** ACIS Focal Temperature ********

There are three peaks as usual.

       Day (DOY)       Temp (C)        Width (DAY)

        202.1           -111.5          0.26
        204.7           -111.3          0.27
        207.3           -111.0          0.27

     ************** MTA Problem Tracking *****************

No new or renewed problems are reported this week.

                ******** Trending  ***********

Annual cycles are now clear for several ACIS electronics msids
(1DE28[A/B]VO, 1DP28[A/B]VO,1DAHHBVO).

software note:
Several msids are moved around in plots.

Following msids are now appeared in Battery Usage (spcbatt):
EB1DI, EB2DI, EB2V,EB1CI, EB2CI, EB3V, EB3CI, EB1V, EB3DI,
ECNV3V, ECNV2V, ECNV1V, EEPB5V

Following msids are now appeared in Spacecraft Electronics (spcelec):
ELBI, ELBV

Following msids are now appeared in IRU Temperatures and Electronics
(pcaditv):
AFSSPC1V, AGWS1V, AFSSPC2V, AGWS2V

             *************  Telemetry ***********

Transmitter [A/B] output power and transmitter [A/B] secondary
voltage of Spacecraft Electronics dropped to zero and issued
red alerts for the most part of this week. However, according to
Jeff Shirer (jshirer@cfa.harvard.edu), they are expected to be
zero when the associated transmitter is turned off, and hence
it is nothing to worried about.


             *********** Photon Page ************

MSID   DETECTOR        GRATING TARGET          ANALYSIS
- ---------------------------------------------------------

677     ACIS-S          NONE    4U1543-47       OK
737     ACIS-I          NONE    G347.5-0.5      OK
736     ACIS-I          NONE    G347.5-0.5      OK
668     ACIS-S          NONE    1746-331        OK
655     ACIS-I          NONE    TERZAN 5        OK
812     ACIS-S          HETG    PG 1404+226     OK GRATING ANALYSIS NOT COMPLETED
729     ACIS-I          NONE    KES 73          OK
636     ACIS-S          HETG    HD45348         OK GRATING ANALYSIS NOT COMPLETED
1828    ACIS-S          HETG    N132D           OK GRATING ANALYSIS NOT COMPLETED
121     ACIS-S          HETG    N132E           OK GRATING ANALYSIS NOT COMPLETED
701     ACIS-S          HETG    X0918-54        OK
5       ACIS-S          HETG    TW HYA          OK  GRATING ANALYSIS  NOT COMPLETED


HRC-I plate scale and focal length
From Maxim
I have looked at the reprocessed HRC-I plate scale data, plus an additional
long GTO observation of the star cluster, and got a 0.05%+-0.02% correction
of the focal length (the new value is 10066.5+-2.3 mm). This comes from the
on-axis star cluster data alone. The off-axis LMC X-1 pointings are
consistent. This focal length requires a 0.11% change of the ACIS pixel size
(compared to 0.16% before).