Subject: SOT shift report 2001-02-28 M587
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Feb_28_2001_M587.txt.

Shift M587. 
	Start at 59:20:00  GMT
		 = 03:00pm    28 Feb EST
	End	   06:00pm    28 Feb
   
SOT Lead	M. Freeman

(Times will be given in GMT on day 59. In general
times are rough, not precise.)

PLAN
----
Continue running load FEB2601c. The entire orbit will be  OBSID 2091,
an ACIS-S/HETG observation of NGC 3783, simultaneous with HST/STIS to study the
X-ray & UV absorbers. During the subsequent perigee passage we will do
the monitor window acquisition test and ACA dark field calibration.

Next Comms:
 059:22:00 to 23:00 (this shift)
 060:06:20 to 07:20
 060:11:00 to 15:50 Dark Field calibration
 060:23:00 to 00:00
 061:08:00 to 09:00
 061:15:45 to 17:45
 062:01:45 to 03:45
 062:06:20 to 08:20
 062:13:25 to 14:50
 062:21:40 to 23:30
 063:08:10 to 10:10
 063:14:00 to 15:00
 063:23:10 to 00:10

Orbital events:
 2001:060:18:16:05.507    216      ORBIT PERIGEE    ACA operations.

 2001:062:02:00:38.395    217      ORBIT APOGEE                       
 2001:063:09:45:27.201    217      ORBIT PERIGEE                      

 2001:064:17:29:28.632    218      ORBIT APOGEE                       
 2001:066:01:14:57.917    218      ORBIT PERIGEE                      

 2001:067:08:58:01.308    219      ORBIT APOGEE                       
 2001:068:16:43:00.267    219      ORBIT PERIGEE                 


EVENTS					Time	OBSID
------					----	-----
Start shift			    059:2000
AOS (DSS-34, Canberra)			2200
Status nominal (note 1)			2204	2901
LOS (status essentially unchanged)	2300
End shift				2315

NOTES/ISSUES/PROBLEMS
---------------------

(1) Chandra status near AOS at 2200:

UTC 2001:059:22:04:18 (Feb28) f_ACE 1.40e+01 F_ACE 5.23e+06 Kp 3.0 R km 127741D
OBT 2001:059:22:03:49  CTUVCDU  9622248  OBC s/w NRML  FMT2_EPS    CPEstat NORM
OBT       99785029.63  ONLVCDU  9622240  OBC Errs   0
                                                     OBSID   2091  EPState  SUN
SIM TTpos   74423  HETG Angle  6.71  PCADMODE NPNT   RA   174.747  Bus V  29.93
SIM FApos    -467  LETG Angle 78.34  PCONTROL NPNT   Dec  -37.759  Bus I  31.78
                                     AOFSTAR  GUID   Roll  19.215
ACA Object FFFSSSSS    Dither  ENAB                                HRC-I HV OFF
ACA ImFunc TTTTTTTT    Dith Yang  -7.74    Yaw Rate     -0.23      HRC-S HV  ON
ACA CCD Temp  -10.4    Dith Zang  -2.03    Pitch Rate    0.05      OBSMode NEXT
ACA Int Time  1.698                        Roll Rate    -0.31      Door OP UNAC
AOACSTAT         OK    FSS SunBeta  SUN                            Door CL UNAC
                       FSS Alfa   -2.07    Batt 1 SOC  100.00%
Avg HRMA Temp 70.61    FSS Beta  -43.29    Batt 2 SOC  100.00%  ACIS Stat7-0 64
Avg OBA Temp  50.89    SA Resolv 132.31    Batt 3 SOC  100.00%  Cold Rad -127.9
OBA Tavg Fault NFLT    SA Sun Pres ILLM                         Warm Rad  -82.0
OBA Trng Fault NFLT                        +Y SA Amps   15.07   RadMon     ENAB
HRMA power    72.20    SCS 128   ACT       -Y SA Amps   15.66   EPHIN Geom LARG
OBA power     89.40    SCS 129   ACT       +Y SA Temp  116.22   E150        1.2
                       SCS 130   ACT       -Y SA Temp  117.32   E300        0.1
Roll Mom.     5.113    SCS 107  INAC                            E1300       0.0
Pitch Mom.  -20.235   UpL Cmd Acc  12713   EPH A-Leak  0.7120   P4GM        0.0
Yaw Mom.      3.196   Cmd Rej A      215   EPH B-Leak  0.1320   P41GM       0.0

(2) Radiation levels very low.  ACE EPAM3 flux is just 14 (threshold 5e04).
    Shanil, however, noted a full halo CME today beginning about 14:50GMT.
    Levels bear watching over the next few days.

(3) As noted yesterday, ACA occasionally losing track in slot 7 on a faint
    guide star, with a warm pixel (~300 counts) nearby.