Oct_13_1999_L82.txt Shift L82
        Start at 1999:286:11:30:00 GMT
                = 1999 Oct 13  7:30am EDT
        End       1999 Oct 13 12:00pm EDT

   
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Oct_13_1999_L82.txt.



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

Plan: - Running P21b load, SHORT eclipse (OBA setpoint raised)


EVENTS							    DONE	OBSID
--------------						    ----	-----
Start Shift                                             286:1130          303         
----- Real time------ DSS-54 (Madrid)
Chandra State at start of shift was nominal
   (see note 1)
Start maneuver to eclipse attitude                      286:1158        62352
Complete maneuver, acquire 5 stars (3 ACQ, 2 GUIDE)     286:1303
Eclipse start                                           286:1409
Eclipse end (see note 2)                                286:1433
LOS                                                     286:1520
End of shift                                            286:1600


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

1) Chandra's state at start of shift:

UTC 1999:286:11:30:01 (Wed Oct 13)
OBT 1999:286:11:29:33   CTUVCDU  5456767   FMT2_EPS   OBC s/w NRML  OBC Errs   0
OBT       56201373.00   ONLVCDU  5456760
                                                      OBSID    303  EPState  SUN
SIM TTpos  -99616   HETG Angle  81.3  PCADMODE NPNT   RA    10.707  Bus V  30.08
SIM FApos    -535   LETG Angle  81.3  PCONTROL NPNT   Dec   41.287  Bus I  35.84
                                      AOFSTAR  GUID   Roll 192.742
ACA Object SSSSSSSS     Dither  ENAB                                HRC-I HV OFF
ACA ImFunc NNNTTTTT     Dith Yang  -2.33    Yaw Rate     -0.01      HRC-S HV OFF
ACA CCD Temp  -10.4     Dith Zang  -7.98    Pitch Rate   -0.01      OBSMode NEXT
ACA Int Time  1.698                         Roll Rate     0.02      Door OP UNAC
AOACSTAT         OK     FSS SunAlfa NSUN                            Door CL UNAC
                        FSS Alfa  -17.35    Batt 1 SOC  100.00%
Avg HRMA Temp 70.58     FSS Beta  -49.66    Batt 2 SOC  100.00%
Avg OBA Temp  50.42     SA Resolv 146.06    Batt 3 SOC  100.00%  ACIS Stat7-0 66
OBA Tavg Fault NFLT     SA Sun Pres ILLM                         Cold Rad -120.7
OBA Trng Fault NFLT                                              Warm Rad  -82.0
HRMA power   118.10
OBA power    127.80                                              EPHIN Geom SMAL
                                                                 INT cnt     101
Roll Mom.     1.220                                              P41GM cnt     0
Pitch Mom.    1.706                                              A-Leak   0.1880
Yaw Mom.     10.419                                              B-Leak   0.0280

2) Eclipse performance was nominal. Bus voltage rose to 33.2 volts. OBA temps went
   up to 55 deg F and were trending down at LOS. Real time commanding of the EPS
   subsystem was required during the eclipse to adjust software timers which were
   setup incorrectly prior to eclipse entry.