ACIS SOT Shift Report 

See http://cxc.harvard.edu/mta/SOT_reports/sot-shift.html

Report M7613.

    Start at 2020:146:23:05 GMT
             = 07:05 pm EDT May 25, 2020
    End   at 2018:147:02:30 GMT
             = 10:35 pm EDT May 25, 2020

ACIS SOT Shift Report May 25, 2020

ACIS Personnel: John ZuHone, Paul Plucinsky, Catherine Grant, Jack Steiner, Dick Edgar

PLAN
----
We ran CAP1527 to execute a 16 hour ECS measurement during the recovery from the
Safe Mode on DOY 145. The Obsid for this measurement is 62655. Originally, it
was assumed that this ECS measurement would occur at tail-Sun attitude which is
hot for ACIS, so this is a 4 CCD ECS measurement clocking I1-I3 and S3 since a 5
or 6 CCD measurement would have violated the 1DPAMZT limit. Because there was
not enough time in the comm to maneuver the spacecraft to a tail-Sun attitude,
the ECS measurement was executed at normal Sun, which is advantageous since it
results in a cold and stable focal plane.

CLD File executed:

1A_4_CTI_16H_135.cld

SUMMARY:
--------

The CAP executed exactly as expected. 

TIMELINE (GMT days 146-147)
----------------------
146:23:05  AOS on DSS 65
146:23:05  Telemetry in Format 5
147:02:00  Verified radiation levels acceptable
147:02:03  OC switches to Format 2
147:02:05  Obsid set to 62655
147:02:07  1A_4_CTI_24H_135.cld uploaded
147:02:08  SCS-135 enabled and activated
147:02:10  LOAD_TE observed
147:02:10  System configuration and Huffman table dumped
147:02:11  1STAT1ST bit changed from 1 to 0 indicating science run started
147:02:13  FP temp = -119.9 C and steady
147:02:13  1DPAMZT (DPA box temp) = +9.3 C
147:02:14  1DPICACU/1DPICBCU currents rose to correct values
147:02:23  First Bias map starts to be telemetered
147:02:25  FEP and BEP temperatures between +3 and +12 C
147:02:30  First event data; event rates on I0-I3, & S3 look reasonable
147:02:35  LOS