May_08_2000_M290.txt Shift M290
        Start at 2000:129:18:00:00 GMT
                = 2000 May 8  4:00pm EDT
        End       2000 May 8  8:00pm EDT


See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/May_08_2000_M290.txt


SOT Lead             Robert Cameron
SOT SC/ACA	     Bill Podgorski
FOT-SI
HRC-SI
ACIS-SI        
OTHER           

Plan: - Running Apr2300B:

Seq #  ObsID       Target              start           SI     Grat    RA      dec    roll
-------------------------------------------------------------------------------------------
400049 00682     XTE J1550-564  2000:129:23:00:33.464  ACIS-S NONE(*) 237.7587 -56.4906  17.26
200066 00641   PROXIMA CENTAURI 2000:130:00:01:53.464  ACIS-S NONE(*) 217.3927 -62.6922 348.96
(*)These observations should have used HETG, but are being done with HETG retracted.

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

1) Chandra snapshot at 129:2330

UTC 2000:129:23:30:02 (Mon May  8) f_ACE 4.83e+02  F_ACE 2.13e+08  R km 112460D
OBT 2000:129:23:29:30  CTUVCDU 10503073  OBC s/w NRML  FMT2_NORM   CPEstat 
OBT       74215770.43  ONLVCDU 10503064  OBC Errs   1
                                                     OBSID    682  EPState  SUN
SIM TTpos   79599  HETG Angle  80.6  PCADMODE NPNT   RA   237.753  Bus V  30.55
SIM FApos    -467  LETG Angle  79.1  PCONTROL NPNT   Dec  -56.494  Bus I  33.81
                                     AOFSTAR  GUID   Roll  17.256
ACA Object FFFSSSSS    Dither  ENAB                                HRC-I HV OFF
ACA ImFunc TTTTTTTT    Dith Yang -14.34    Yaw Rate     -0.26      HRC-S HV  ON
ACA CCD Temp  -10.4    Dith Zang   9.37    Pitch Rate   -0.43      OBSMode NEXT
ACA Int Time  1.698                        Roll Rate     0.08      Door OP UNAC
AOACSTAT         OK    FSS SunBeta NSUN                            Door CL UNAC
                       FSS Alfa   -0.43    Batt 1 SOC  100.00%
Avg HRMA Temp 70.61    FSS Beta   49.74    Batt 2 SOC  100.00%  ACIS Stat7-0 64
Avg OBA Temp  50.89    SA Resolv 140.10    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
HRMA power    58.30                        -Y SA Amps   16.64   EPHIN Geom LARG
OBA power    120.20                        +Y SA Temp  111.43   E1300        10
                                           -Y SA Temp  112.35   P4GM          7
Roll Mom.    -0.818    SCS 128                                  P41GM         0
Pitch Mom.    9.007    SCS 129             UpL Cmd Acc   6600   A-Leak   0.4640
Yaw Mom.      1.703    SCS 130             Cmd Rej A      189   B-Leak   0.0720

2) Chandra's state at 129:2330 was:

                                       WAS                   EXPECTED
       PCAD MODE              =       NPNT                       NPNT
       CONTROL LAW FLAG       =       NPNT                       NPNT
       Stars:                 =          5                          5
       FIDS                   =          3                          3
       RA                     =    237.759 deg                237.759
       DEC                    =    -56.491 deg                -56.491
       ROLL                   =      17.26 deg                  17.26
       Format                 =          2                          2
       OBSID                  =        682                        682
       SIM FA                 =       -467                       -468
       SIM TSC                =      79599                      79600
       HETGA                  =       80.6 deg (OUT)               IN
       HETGB                  =       81.0 deg (OUT)               IN
       LETGA                  =       79.8 deg (OUT)              OUT
       LETGB                  =       79.1 deg (OUT)              OUT
       EPHIN A-leak           =     0.4640
             B-leak           =     0.0720
       EPHIN Geom             =       LARG
             E1300            =         10    (RADMON trigger = 1319)
             P4GM             =          7    (RADMON trigger = 3542)
             P41GM            =          0    (RADMON trigger = 100)

       ACIS          FP Temp  =     -120.5
                      DEA Pwr =       47.8
                      DPA Pwr =       40.4

3) ACE 130-214 keV proton flux (p/cm2-s-sr-MeV) and fluence (p/cm2-sr-MeV):

         Average Flux:         540, rising, although perhaps starting to 
                               level off.
         2-hour Fluence:       3.86E+06   (SOT alert at 3.6E+8)
         Orbital Fluence:      2.14E+08   (SOT alert at 1.0E+9)

4) The HETG did not insert for the XTE J1550-564 observation, as expected,
   since the HETG A-side electronics retraction limit switch already shows 
   an "INSERTED" state. The Proxima Centauri observation will also occur 
   without the HETG. XTE J1550-564 is at about 0.4 Crab.
  
   A small HETG retraction was performed today, to attempt to set the 
   A-side limit switch to the retracted state. Only momentary closure of
   the switch was achieved. That data, together with data from previous 
   HETG motions, are being analyzed.

   FOT Mission Planning is preparing a replacement observing sequence
   without OTGs for the next few days.
   The FOT, Kodak TRW West and the SOT are preparing a recovery sequence
   for OTG operations. Further HETG testing will occur tomorrow.