Apr_28_2000_M280.txt Shift M280
        Start at 2000:119:18:00:00 GMT
                = 2000 Apr 28  2:00pm EDT
        End       2000 Apr 28  5:00pm EDT


See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_28_2000_M280.txt


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

Plan: - Running Apr2300B:

Seq #  ObsID       Target              start           SI     Grat    RA      dec    roll
-------------------------------------------------------------------------------------------
 ----  62071             CAL-ER 2000:119:16:12:55.066   --    --   80.0000  60.0000 305.78
 ----  62070             CAL-ER 2000:120:04:00:28.605   --    --   80.0000  60.0000 306.19

ORBITAL EVENTS:
 2000:118:16:13:14.321    100       EAPOGEE       ORBIT APOGEE
 2000:119:23:57:20.931    100       EPERIGEE      ORBIT PERIGEE
 2000:121:07:40:31.999    101       EAPOGEE       ORBIT APOGEE

EVENTS                                                      DONE     OBSID
--------------                                              ----     -----
Start Shift                                             119:1800     
AOS DSS-46 (Canberra 26m)                               119:1840     62071
Chandra status was nominal (see note 1)
LOS DSS-46 (Canberra 26m)                               119:2000
End of shift                                            119:2100


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

1) Chandra snapshot at 119:1850 was:

UTC 2000:119:18:52:01 (Fri Apr 28) f_ACE 2.19e+03  F_ACE 0.00e+00  R km  60591D
OBT 2000:119:18:50:48  CTUVCDU  7066111  OBC s/w NRML  FMT2_NORM   CPEstat 
OBT       73335048.20  ONLVCDU  7066048  OBC Errs   0
                                                     OBSID  62071  EPState  SUN
SIM TTpos  -99616  HETG Angle  80.2  PCADMODE NPNT   RA    80.003  Bus V  31.02
SIM FApos    -467  LETG Angle  79.1  PCONTROL NPNT   Dec   60.001  Bus I  29.50
                                     AOFSTAR  GUID   Roll 305.775
ACA Object SSSSSSSS    Dither  ENAB                                HRC-I HV OFF
ACA ImFunc TTTTTNNN    Dith Yang   0.47    Yaw Rate      0.19      HRC-S HV  ON
ACA CCD Temp  -10.4    Dith Zang  -6.49    Pitch Rate    0.10      OBSMode NEXT
ACA Int Time  1.698                        Roll Rate     0.08      Door OP UNAC
AOACSTAT         OK    FSS SunBeta  SUN                            Door CL UNAC
                       FSS Alfa   -0.18    Batt 1 SOC  100.00%
Avg HRMA Temp 70.61    FSS Beta   34.23    Batt 2 SOC  100.00%  ACIS Stat7-0 67
Avg OBA Temp  51.05    SA Resolv  55.70    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   14.68
HRMA power    99.30                        -Y SA Amps   15.66   EPHIN Geom LARG
OBA power    139.60                        +Y SA Temp  110.20   E1300         2
                                           -Y SA Temp  110.51   P4GM        790
Roll Mom.    -2.437    SCS 128                                  P41GM         0
Pitch Mom.   -6.323    SCS 129             UpL Cmd Acc  28321   A-Leak   0.3680
Yaw Mom.      0.036    SCS 130             Cmd Rej A      114   B-Leak   0.0600

2) Chandra's state at 119:1850 was:

                                       WAS                   EXPECTED
       PCAD MODE              =       NPNT                       NPNT
       CONTROL LAW FLAG       =       NPNT                       NPNT
       Stars:                 =          5                          5
       FIDS                   =          0                          0
       RA                     =     80.000 deg                 80.000
       DEC                    =     60.000 deg                 60.000
       ROLL                   =    305.778 deg                305.778
       Format                 =          2                          2
       OBSID                  =      62071                      62071
       SIM FA                 =       -467                       -468
       SIM TSC                =     -99616                     -99616
       HETGA                  =       80.2 deg (OUT)              OUT
       HETGB                  =       81.0 deg (OUT)              OUT
       LETGA                  =       80.2 deg (OUT)              OUT
       LETGB                  =       79.1 deg (OUT)              OUT
       EPHIN A-leak           =     0.3680
             B-leak           =     0.0600
       EPHIN Geom             =       LARG
             E1300            =          2    (RADMON trigger = 1319)
             P4GM             =        790    (RADMON trigger = 3542)
             P41GM            =          0    (RADMON trigger = 100)

       ACIS          FP Temp  =     -119.7
                      DEA Pwr =       22.9
                      DPA Pwr =       40.5

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

         Average Flux:         2200, rising, although perhaps starting to 
                               level off.
         2-hour Fluence:       1.64E+08   (SOT alert at 3.6E+8)
         Orbital Fluence:      0.00E+00   (SOT alert at 1.0E+9)

   The 2-hour fluence is at 46% of the alarm limit. The orbital fluence
   is reset to 0 while Chandra is below 70 Mm geocentric distance.
   The FOT is aware of the proton flux, and is monitoring.

4) Quick Look data review:

   There are no new quicklook datasets.