Subject: SOT shift report 2001-02-27 M586
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Feb_27_2001_M586.txt.

Shift M586. 
	Start at 058:19:30  GMT
		 = 02:30pm    27 Feb EST
	End	    4:30pm    27 Feb
   
SOT Lead	M. Freeman
(Times will be given in GMT on day 58.)

PLAN
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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.

Next Comms:
 059:02:55 to 04:55
 059:13:00 to 14:00
 059:22:00 to 23:00

Orbital events:
 2001:059:10:32:11.372    216      ORBIT APOGEE 
 2001:060:18:16:05.507    216      ORBIT PERIGEE

 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				    058:1930
AOS (DSS-24, Goldstone)				2000
Chandra status nominal, see note1		2005	2091
Rad levels still low, see note 2
Lost track on star in slot 7			2028
Reacquired sometime before			2031
LOS						2100
End shift					2130

NOTES/ISSUES/PROBLEMS
---------------------
(1) Chandra snapshot near AOS:

UTC 2001:058:20:05:19 (Feb27) f_ACE 3.16e+02 F_ACE 1.89e+06 Kp 2.7 R km 119846A
OBT 2001:058:20:04:49  CTUVCDU  9257215  OBC s/w NRML  FMT2_SSR    CPEstat NORM
OBT       99691489.39  ONLVCDU  9257200  OBC Errs   0
                                                     OBSID   2091  EPState  SUN
SIM TTpos   74423  HETG Angle  6.71  PCADMODE NPNT   RA   174.753  Bus V  29.93
SIM FApos    -467  LETG Angle 78.34  PCONTROL NPNT   Dec  -37.760  Bus I  33.55
                                     AOFSTAR  GUID   Roll  19.217
ACA Object FFFSSSSS    Dither  ENAB                                HRC-I HV OFF
ACA ImFunc TTTTTTTT    Dith Yang   7.37    Yaw Rate     -0.14      HRC-S HV  ON
ACA CCD Temp  -10.4    Dith Zang   6.00    Pitch Rate   -0.01      OBSMode NEXT
ACA Int Time  1.698                        Roll Rate    -0.09      Door OP UNAC
AOACSTAT         OK    FSS SunBeta  SUN                            Door CL UNAC
                       FSS Alfa   -0.88    Batt 1 SOC  100.00%
Avg HRMA Temp 70.61    FSS Beta  -42.62    Batt 2 SOC  100.00%  ACIS Stat7-0 65
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   16.05   RadMon     ENAB
HRMA power    35.80    SCS 128   ACT       -Y SA Amps   17.03   EPHIN Geom LARG
OBA power    166.00    SCS 129   ACT       +Y SA Temp  115.49   E150        5.3
                       SCS 130   ACT       -Y SA Temp  116.22   E300        0.1
Roll Mom.     4.720    SCS 107  INAC                            E1300       0.0
Pitch Mom.  -10.133   UpL Cmd Acc  12061   EPH A-Leak  0.8080   P4GM        0.1
Yaw Mom.      3.301   Cmd Rej A      194   EPH B-Leak  0.1480   P41GM       0.0

(2) Radiation levels in the ACE EPAM3, although higher than they have been for
    several days, have only managed to climb to "moderately low" (~300). 
    They are in flux, however, and bear watching.

(3) Loss of track on star in slot 7 several times during COMM.  Star is 
    fairly faint (10.5 mag) and has a warm pixel in the vicinity.  Sent
    email to ASCDS about ignoring this slot/star when processing this
    observation.