Aug_03_2000_M377.txt Shift M377
        Start at 2000:216:17:10:00 GMT
                = 2000 Aug  3  1:10pm EDT
        End       2000 Aug  3  3:00pm EDT

SOT shift report 2000-08-03 M377
   
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html

SOT Lead             Mark Freeman
SOT SC/ACA	
FOT-SI
HRC-SI  
ACIS-SI        
OTHER           

Plan: - Running JUL3000B near apogee. Observing Elais:N1 (obsid 888), 
        with ACIS-I.  This long observation (75ksec) will proceed all
        the way to radiation belt preparation at around 217:11:54.
   
ORBITAL EVENTS:

 2000:216:12:37:31.325    137       EAPOGEE       ORBIT APOGEE                       
 2000:217:14:27:15.524    137       EE1RADZ0      ELECTRON1 RADIATION ENTRY0         
 2000:217:20:21:59.836    137       EPERIGEE      ORBIT PERIGEE                      
 2000:217:20:31:15.524    137       EP1RADZ0      PROTON1 RADIATION ENTRY0           
 2000:217:21:19:15.524    137       XP1RADZ0      PROTON1 RADIATION EXIT0            
 2000:218:00:01:15.524    138       XE1RADZ0      ELECTRON1 RADIATION EXIT0          
 2000:219:04:05:20.035    138       EAPOGEE       ORBIT APOGEE                       
 2000:220:06:22:33.052    138       EE1RADZ0      ELECTRON1 RADIATION ENTRY0         
 2000:220:11:00:33.052    138       EP1RADZ0      PROTON1 RADIATION ENTRY0           
 2000:220:11:49:02.866    138       EPERIGEE      ORBIT PERIGEE                      


EVENTS                                                      DONE     OBSID
--------------                                              ----     -----
Start Shift                                             216:1710

Status at COMM was nominal (see note 1)                                888

End of shift and COMM                                   216:1900


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

1) Status during COMM (see notes 2,3):

UTC 2000:216:17:38:02 (Aug 3) f_ACE 1.13e+02 F_ACE 1.15e+07 Kp 3.7 R km 140944D
OBT 2000:216:17:37:08  CTUVCDU  6199990  OBC s/w NRML  FMT2_NORM   CPEstat 
OBT       81711428.47  ONLVCDU  6199976  OBC Errs   0
                                                     OBSID    888  EPState  SUN
SIM TTpos   92903  HETG Angle  80.2  PCADMODE NPNT   RA   242.580  Bus V  31.02
SIM FApos    -535  LETG Angle  78.3  PCONTROL NPNT   Dec   54.587  Bus I  27.22
                                     AOFSTAR  GUID   Roll 245.090
ACA Object FFFSSSSS    Dither  ENAB                                HRC-I HV  ON
ACA ImFunc TTTTTTTT    Dith Yang  -7.87    Yaw Rate      0.28      HRC-S HV OFF
ACA CCD Temp  -10.4    Dith Zang   3.97    Pitch Rate    0.04      OBSMode NEXT
ACA Int Time  1.698                        Roll Rate    -0.12      Door OP UNAC
AOACSTAT         OK    FSS SunBeta  SUN                            Door CL UNAC
                       FSS Alfa   -0.19    Batt 1 SOC  100.00%
Avg HRMA Temp 70.61    FSS Beta    3.51    Batt 2 SOC  100.00%  ACIS Stat7-0 64
Avg OBA Temp  50.97    SA Resolv  86.32    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   12.95
HRMA power    76.20    SCS 128             -Y SA Amps   14.10   EPHIN Geom LARG
OBA power     59.10    SCS 129             +Y SA Temp  108.17   E150       24.4
                       SCS 130             -Y SA Temp  108.70   E300        0.6
Roll Mom.    -4.305                                             E1300       0.1
Pitch Mom.   -5.232   UpL Cmd Acc  26092   EPH A-Leak  0.6760   P4GM        0.3
Yaw Mom.      0.732   Cmd Rej A       56   EPH B-Leak  0.1200   P41GM       0.0

2) Radiation levels still well below thresholds.

3) Telemetry was poor during first 20-25 minutes of contact with DSS-66,
with visible dropout affecting even the ACA realtime display.
This is probably a result of using a small dish (26m) near apogee.  Some
switching of channels and other work by the ground station apparently
cleared up most of the problem.

4) Playback restarted at 18:05.