Sep_11_1999_H51.txt Shift H52
        Start at 1999:254:07:00:00 GMT
                = 1999 Sep 12 04:00am EDT
        End       1999 Sep 12 06:10am EDT

   
SOT Lead	Bill Podgorski
SOT SC/ACA
FOT-SI		
HRC-SI          Gerry Austin
ACIS-SI		Paul Plucinsky, Fred Baganoff


Status/Plans:
------------
  - Run ACIS diagnostics per CAP 412.
  - Running P13 load
  - SOT covers contact time only 


      
EVENTS							    DONE	OBSID
--------------						    ----	-----
Start Shift                                             254:0700           53 - P13 load
----- Out of Contact------
AOS DSS-46                                              254:0825
----- Real time------ 
Confirm configuration                                   254:0825
   (see details below)
Start CAP 412, ACIS Diagnostic test                     255:0844
Change OBSID to 62428                                   255:0856        62428
ACIS Start science, CAP step 6                          255:0859
   (~2000s Timed Exposure on S2 and S3, faint mode)
Scheduled turn-off of COMM in daily load                255:1010
Real-time transmitter turn-on                           255:1011
ACIS Stop science (step 10)                             255:1020
Change OBSID to 62427                                   255:1023
ACIS Start Science, CAP 412 step 13                     255:1024
   (Event histogram, S detector)
Execute CAP 413 to set ACIS FP temp to -120C            255:1030
Reset format to 1                                       255:1046
Set OBSID to 62426 for HRC Observation                  255:1048
Complete CAP 412                                        255:1051
Loss of commanding                                      255:1053
LOS DSS-46                                              255:1010
----- Out of Contact------


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

1) At AOS the spacecraft configuration was nominal. It was in Normal Point mode
   with OBSID = 53. The SIM TSC was at -99616 (HRC-S) and the FA at -882.
   There were 5 stars observed and 3 FIDs. 
 
        RA:     79.201492
        DEC:    45.980237
        ROLL:   95.781850

   HOWEVER - format was 2, was not reset to 1 after last ACIS CAP(410). Load P13
             did not set format back to 1 since last observation when P12 was
             terminated (253:1950) (OBSID 1253) had been an HRC-I observation.


   This format problem made the initial part of OBSID 53 invalid. Will reset
   format to 1 before LOS and change OBSID to 62426 as replacement for 53.

   PROBLEM - LETG is NOT in as it should be.

2) Real time observation of LETG/HRC-S indicates a possible source at about
   40 arcmin off-axis in -Y direction, falling on -Y HRC-S channel plate. This
   may be the object mentioned in the quick-look analysis of OBSID 62435,
   

3) At LOS the ACIS Focal plane temp was -107.4C.

4) After LETG problem was noticed Bruce Twambly, Keith Havey were contacted to work
   problem. Bill Peterson FOT flight software, will also work problem.